A kind of high abrasion cermet composite roll set and preparation method thereof
Technical field
The invention belongs to wear-resistant material technical fields, and in particular to a kind of high abrasion cermet composite roll set and its prepare
Method.
Background technology
Crushing is in the widely applied basic work of all conglomeraties such as mine, medicine, building materials, machinery, environmental protection, papermaking
Skill plays a crucial role in the development of national economy.High-pressure roller mill, vertical mill are wear-proof techniques currently on the market
The two kinds of disintegrating apparatus mainly used in field, roll surface mainly have antifriction alloy roller at present by years of researches and exploitation
Face, wear-resistant material hardfacing roll surface, hexagon powder metallurgy roll surface and hard alloy stud inlay four kinds of roll surface.Antifriction alloy roll surface
Using relatively broad, but there is a problem of that wearability is insufficient in actual application;The making work of wear-resistant material hardfacing roll surface
Skill is that two layers of different material is welded on wear resistant roll matrix, is chiefly used in cement industry, this kind of roll surface can repeatedly lose abrasion
Normal use after the roll surface of effect is repaired, but weld and compound bed boundary are easily cracked and lead to material in use
Material falls off;For hexagon powder metallurgy roll surface at present also in the experimental stage, the problem of being primarily present is that brittleness is larger, crushed
Stress concentration is easily generated in journey and crack initiation;Hard alloy stud inlays the unique design that roll surface has its relatively advanced, but
Roll surface failure is since the wearability of basis material is insufficient with compression strength mostly, and the selection of matrix roll surface material is into one
Step improves the key of its performance and service life.
Under numerous working conditions, it is desirable that material has higher wearability, while material being required to have good fracture
Toughness.It is met the requirements in general, single material is more difficult, therefore compound using the progress of the bimetallic of higher abrasion resistance and preferable toughness
Casting, using the method for centrifugal casting, makes a kind of not only wear-resisting but also Resisting fractre metal roller, can significantly promote the resistance to of material
Mill property, but the wear resistant roll set for applying such method to prepare has a metallurgical binding, easily there is hole in faying face, cracking lacks
It falls into, the service life that composite roll covers is made to substantially reduce;That there are centrifugal casting apparatus costs is higher using such preparation method simultaneously,
The problem of technical matters complexity.
Invention content
In view of the deficiencies of the prior art, the present invention proposes a kind of high abrasion cermet composite roll set and its preparation side
Method, the high abrasion cermet composite roll set be one kind using common middle low carbon steel or low-alloy steel as the preset inner sleeve of high tenacity, with
Ceramic-metal composite enhances block and high-wear-resistant alloy material is cast into the composite roll set of housing.The technology of preparing is with reasonable
Structure design, the preparation process of simple and flexible, make cermet composite roll set with higher wear-resisting property, mechanical tenacity and
Impact resistance.
The present invention uses common middle low carbon steel or low-alloy steel to be positioned over sand mold designated position for preset inner sleeve, and housing is gold
Belong to ceramic composite enhancing block to pour into a mould with high-wear-resistant alloy and form integrated composite roll set.Cermet is multiple in housing
Condensation material enhance block using temperature programmed control sintering method preparation, the technology low production cost, it is simple for process, can effectively control
The ceramic particle homogeneous distribution of high-volume fractional.In the preparation, sintering powder bottom is put into using the stainless steel part of inverted " t " type,
Ceramic-metal composite is enhanced and has more the tip portion for carrying out T-shape in block by designated position insertion sand mold, then in metal
Ceramic composite enhances pours into high-wear-resistant alloy liquid among block and preset inner sleeve.By subsequent heat treatment, whole composite wood
Expect performance boost, obtained composite roll set interface cohesion is preferable, the gross imperfections such as no hole, segregation, crackle.
A kind of high abrasion cermet composite roll set of the present invention, including preset inner sleeve and housing, the material of preset inner sleeve
For common middle low carbon steel or low-alloy steel, housing mould material, which is high-wear-resistant alloy and ceramic-metal composite, enhances block;
Housing wall thickness is that high abrasion cermet composite roll covers the 1/5~1/2 of whole wall thickness;
Wherein, the impact flexibility of the common middle low carbon steel or low-alloy steel is 21~100J/mm2;
The mass percent of ingredient and each ingredient that the high-wear-resistant alloy contains is:C:1.0%~3.5%, Mo:
2.0%~10.0%, Mn:0.5~1.0%, Cr:2.0~16%, V:0~10.0%, Ni:0~1.0%, W:0~20%,
Nb:0~3%, Ti:0~20%, Si:0.1%~1%, P:0~0.02%, S:0~0.01%, remaining is for Fe and unavoidably
Impurity;
The ceramic-metal composite enhancing block includes enhancing particle, and wear resistant alloy powders and stainless steel part are fixed
Part;The enhancing particle is as reinforced phase, and the wear resistant alloy powders are as matrix, in mass ratio, enhances particle:It is wear-resisting
Alloy powder=1:(1~4);The stainless steel part fixing piece is preferably that T-shape stainless steel part is fixing piece;
The enhancing particle is ceramic oxide particle and/or carbide ceramic particles;
Wherein, ceramic oxide particle is:Al2O3White fused alumina particle, Al2O3Brown Alundum particle, ZrO2-Al2O3Particle
(ZTA);Carbide ceramic particles are:WC particle, SiC particulate, TiC particles, VC particles, B4C particles, Mo2C particles, ZrC particles,
Cr3C2Particle.It is one such or several mixing to enhance particle, and average particle size range is 0.1~5mm.
In the ceramic-metal composite enhancing block, the matter of ingredient and each ingredient that wear resistant alloy powders contain
Measuring percentage is:C:1~6%, Si:0.1~1.0%, Cr:4~16%, Mo:0~10%, Mn:0~20%, Ti:0~
10%, Ni:0~20%, V:0~10%, Nb:0~3%, W:0~20%, P:0~0.02%, S:0~0.01%, remaining is
Iron and inevitable impurity.
The common middle low carbon steel or low-alloy steel are particularly preferred as Q235,20 steel, 20Cr steel, 40Cr steel, 40CrMo
One kind in steel, 42CrMoV steel, 40 steel or 45 steel.
The T-shape stainless steel part is preferably 316L types.
The ceramic-metal composite enhancing bulk shape is preferably in cylinder, tetragonal body, six arris cylinders
It is a kind of.
High abrasion cermet composite roll set prepared by the present invention, housing ceramic-metal composite enhance the base in block
Body hardness is 700~900HV, and ceramic particle hardness is 1400~2400HV, and interface hardness is 980~1300HV, composite roll set
Impact flexibility is 4~8J/mm2, the shear strength between preset inner sleeve and housing is 500~650MPa.
High abrasion cermet composite roll set prepared by the present invention is in high-pressure roller mill or vertical mill.
The preparation method of the high abrasion cermet composite roll set of the present invention, specifically includes following steps:
Step 1, the preparation of ceramic-metal composite enhancing block:
(1) according to the ratio, weigh enhancing particle and wear resistant alloy powders, be put into mixed powder machine and mix powder, mix the powder time be 2~
4h obtains mixed material;
(2) part of the mixed material is put into crucible bottom, T-shape stainless steel part upside down uses mixture in crucible
Material fills up crucible, obtains the crucible for filling up material;
(3) crucible that will be filled with material uses temperature programmed control sintering process, and ceramic-metal composite, which is made, enhances block;
Step 2, high abrasion cermet composite roll covers preset inner sleeve cast:
(1) common middle low carbon steel or low-alloy steel are selected, is poured into a mould according to common pouring technology, size requirement is obtained
The preset inner sleeve of high abrasion cermet composite roll set;
(2) surface of the preset inner sleeve of high abrasion cermet composite roll set is surface-treated, it is accurate obtains size
The preset inner sleeve of the smooth high abrasion cermet composite roll set in surface;
Step 3, prepared by sand mold:
(1) sand mold raw material is weighed according to proportioning, after mixing, manufactures sand mold, sand mold uses prefabricated wood pattern molding, moulding to finish
Afterwards, filling CO 2 gas is cured, and then takes out prefabricated wooden model, obtains the sand mold after moulding;
The matching size of the size of sand mold and the high abrasion cermet composite roll set of preparation closes, specially:Sand mold it is interior
Diameter is the outer diameter of high abrasion cermet composite roll set, and the height of sand mold is higher by 5 than the height that high abrasion cermet composite roll covers
~15%, meanwhile, the circle of size identical as the preset inner sleeve outer diameter that high abrasion cermet composite roll covers is arranged in the bottom of sand mold
Cylindrical groove, the depth of groove are the 3~8% of preset inner sleeve height, according to high abrasion cermet on the cavity inner wall of sand mold
The ceramic-metal composite enhancing block setting T-shape stainless steel trough of composite roll set, T-shape stainless steel trough it is big
Small and shape is determined according to T-shape stainless steel part;
(2) it by the sand mold mold cavity surface brush fireproof coating after moulding, after igniting is dry, then is placed in baker and dries, it is cold
But after, cooling sand mold is obtained;
Step 4, high abrasion cermet composite roll set housing cast:
(1) cermet prepared in step 1 enhancing block is uniformly inserted into the inner wall surrounding of sand mold;
(2) the preset inner sleeve for the high abrasion cermet composite roll set that step 2 cast obtains is positioned over what step 3 manufactured
In groove in sand mold, whole be pushed into blast furnace is preheated, the casting mold after being preheated;Wherein, preheating temperature is
200~600 DEG C, preheating time is 2~6h;
(3) melting is carried out at 1500~1700 DEG C, obtains highly wear-resisting alloy steel molten steel, cast of coming out of the stove;The high abrasion
The mass percent of chemical composition and each chemical composition that steel alloy molten steel contains is:C:1.0%~3.5%, Mo:2.0%
~10.0%, Mn:0.5~1.0%, Cr:2.0~16%, V:0~10.0%, Ni:0~1.0%, W:0~20%, Nb:0~
3%, Ti:0~20%, Si:0.1%~1%, P:0~0.02%, S:0~0.01%, remaining for Fe and inevitably it is miscellaneous
Matter;
(4) after highly wear-resisting alloy steel molten steel is come out of the stove, using gravity-assist pouring, pouring temperature is 1400~1600 DEG C, is poured into
In casting mold after preheating, it is cooled to room temperature, carries out sand removal processing, and ceramic-metal composite is enhanced to " T " of block
The part that type stainless steel part is inserted into sand mold is cut off, and high abrasion cermet composite roll set after cooling will be obtained;
Step 5, high abrasion cermet composite roll set heat treatment:
(1) high abrasion cermet composite roll after cooling is covered in push-in high temperature furnace and is carried out at integral high-temperature diffusion annealing
Reason, air-cooled, the high abrasion cermet composite roll set after being annealed;Wherein, annealing temperature is 1050~1400 DEG C, when annealing
Between be 10~12h;
(2) the high abrasion cermet composite roll set after annealing is quenched, obtains quenched high abrasion metal pottery
Porcelain composite roll set;Wherein, hardening heat is 900~1000 DEG C, keeps the temperature 9~10h;
(3) quenched high abrasion cermet composite roll set is tempered, obtains high abrasion cermet composite roll
Set;Wherein, temperature is 350~550 DEG C, keeps the temperature 9~12h.
In the step 1 (2), the crucible is preferably corundum crucible, and the shape of crucible is made pottery according to the metal of preparation
Porcelain composite material enhances depending on the shape of block.
In the step 1 (3), the temperature programmed control sintering process, specially:The crucible that will be filled with material is put into atmosphere
It is sintered in protection stove, protective atmosphere is argon gas, and sintering temperature is 1100~1500 DEG C, and sintering time is 6~20h, is obtained
Ceramic-metal composite enhances block;The protection stove is first to vacuumize, and then passes to argon gas, forms argon gas and protects gas
Atmosphere.
In the step 2 (1), the common middle low carbon steel or low-alloy steel, toughness are 21~100J/mm2, tool
Body is preferably one kind in Q235,20 steel, 20Cr steel, 40Cr steel, 40CrMo steel, 42CrMoV steel, 40 steel or 45 steel.
In the step 2 (2), the surface treatment, specially:High abrasion metal is removed using machining process
Ceramic Composite roller covers the surface scale of preset inner sleeve, is cleaned to clean surface with alcohol or acetone soln, and ensure height
The dimensional accuracy of the preset inner sleeve workpiece of wear-proof metal ceramic composite roll set.
In the step 3 (1), the mass percent of raw material and each raw material that the sand mold includes is:Molding sand:75
~80%, clay:10~14%, surplus is water, and molding sand is the mixing of one or more of zircon sand, emergy, chromite sand.
In the step 3 (2), the fireproof coating is alumina powder, and the drying, temperature is 300~700
DEG C, the time is 2~8h.
In the step 4 (3), preferably, the melting, carries out in electric arc furnaces.
In the step 4 (3), before highly wear-resisting alloy steel molten steel is come out of the stove, refining deterioration agent is added, to highly wear-resisting alloy steel
Molten steel carries out Metamorphism treatment.
After tested, made from method described above high abrasion ceramic-metal composite enhancing block matrix hardness >=
700HV, high-wear-resistant alloy pouring area hardness >=800HV, preset inner sleeve hardness >=200HB, composite roll set impact flexibility be >=
4J/mm2, shear strength >=500MPa between preset inner sleeve and housing, and ceramic particle Hardness loss is smaller, ceramic particle with
Basal body interface is apparent metallurgical binding, and cast high-wear-resistant alloy liquid is combined closely with reinforcement and preset inner sleeve interface, whole
End finds that the generation of crackle, the high abrasion cermet composite roll set meet the use item that wear-resistant material crushes field after heat treatment
Part.
A kind of high abrasion cermet composite roll set of the present invention and preparation method thereof, compared to the prior art, has as follows
Feature:
(1) preparation process of the present invention it is simple, it is easily operated, be convenient for industrialization large-scale production;
(2) present invention prepares composite roll set using preset inner sleeve method, after high temperature diffusion annealing is handled, preset inner sleeve with it is outer
Set is metallurgical binding, does not occur hole, crack defect;
(3) present invention employs a variety of ceramic particle reinforced metal base composites, since used ceramic particle has
There are higher hardness, usually the 2~10 of conventional metals wear-resistant material hardness times, be applied to composite roll set housing surface layer,
The service life of roller set workspace is improved to greatest extent;In addition the enhancing block in the present invention is that sintering method is made, can
Individually reach wear-resisting use condition, it can be preferably multiple with highly wear-resisting alloy steel molten steel (potting syrup) in the casting process of step 4
Merging is not broken up.
(4) wear-resisting workspace of the present invention is the 1/5~1/2 of whole roller set, effective saving wear-resistant material
Cost, and its preset inner sleeve be built-in high tenacity middle low carbon steel or low-alloy steel, it is recyclable to re-work use;
(5) high-pressure roller mill or vertical mill high abrasion cermet composite roll set prepared by the present invention, high abrasion close
The cast region of golden steel molten steel generates effective metallurgical binding between preset inner sleeve and cermet enhancing block, no hole,
Cracking phenomena;
(6) high abrasion cermet composite roll of the invention set after heat treatment, exists a large amount of in the tissue of housing pouring area
MC, M2C-type carbide, both equally distributed carbide can be used as the main wear-resisting phase of housing pouring area;Outside workspace
With workspace matrix metallurgical binding occurs for coating metal Ceramic Composite block, and ceramic particle is uniformly distributed in block, volume
Score controlled range is in 25~50% (wt%), since ceramic high hard, high abrasion characteristic makes the wearability of its roll surface workspace
It greatly promotes.
Description of the drawings
Fig. 1 is the long crucible structure schematic diagram that the present invention enhances block for sintering metal ceramic composite;
(a) enhance the crucible structure of block for being sintered cylinder metal ceramic composite for the embodiment of the present invention 1
Stereogram;
(b) enhance block from Fig. 1 (a) A-A cross-section structures for the cylinder metal ceramic composite of the embodiment of the present invention 1
Figure;
(c) enhance the sectional structure chart of block for the cuboid ceramic-metal composite of the embodiment of the present invention 3;
(d) enhance the sectional structure chart of block for six arris cylinder ceramic-metal composites of the embodiment of the present invention 4;
The structural schematic diagram of preset inner sleeve in Fig. 2, the embodiment of the present invention 3;
Enhance block in Fig. 3, the embodiment of the present invention 3 and is inserted into schematic diagram;
Housing pours into a mould schematic diagram in Fig. 4, the embodiment of the present invention 3;
The high abrasion cermet composite roll set diagrammatic side-view cross-sectional structural schematic diagram prepared in Fig. 5, the embodiment of the present invention 3;
The high abrasion cermet composite roll set prepared in Fig. 6, the embodiment of the present invention 3 overlooks schematic cross-sectional view;
Vertical mill prepared by Fig. 7, the embodiment of the present invention 1 covers diagrammatic side-view cross-sectional structural representation with high abrasion cermet composite roll
Figure;
High-pressure roller mill prepared by Fig. 8, the embodiment of the present invention 5 high abrasion cermet composite roll covers metal in housing and makes pottery
Porcelain block interface electron probe picture;
The preset inner sleeve and housing that vertical mill prepared by Fig. 9, the embodiment of the present invention 2 high abrasion cermet composite roll covers
Interface electron probe picture;
In attached drawing, 1 enhances block for cermet, and 1-1 is T-shape stainless steel part, and 1-2 is enhancing particle, and 1-3 is enhancing
Wear resistant alloy powders in block, 2 be preset inner sleeve, and 3 be sand mold, and 4 be T-shape stainless steel trough, and 5 be groove, and 6 be housing
Pouring area.
Specific implementation mode
With reference to embodiment, the present invention is described in further detail.
Embodiment 1
A kind of high abrasion cermet composite roll set is a kind of compound tapered vertical grinding roll cover of high abrasion cermet, is used for
In vertical mill comprising the material of preset inner sleeve 2 and housing, preset inner sleeve is 20 steel, and housing mould material is high-wear-resistant alloy
Enhance block with ceramic-metal composite;Housing wall thickness is that high abrasion cermet composite roll covers the 1/2 of whole wall thickness;
The described ceramic-metal composite enhancing block 1 include enhancing particle 1-2, Cr, C wear resistant alloy powders 1-3 and
T-shape stainless steel part 1-1;The WC particle is as reinforced phase, and Cr, C wear resistant alloy powders are as matrix, by quality
Than WC particle:Wear resistant alloy powders=1:4;The T-shape stainless steel part is fixing piece, specially 316L types;
The basis material of the described ceramic-metal composite enhancing block, ingredient that wear resistant alloy powders contain and each
The mass percent of ingredient is:C:1.0%, Si:1.0%, Cr:16%, Mo:0.5%, Ti:1.0%, W:4.0%, P:
0.02%, S:0.01%, remaining is iron and inevitable impurity.
It is tungsten-cobalt series hard alloy (WC+Co) that WC, which enhances particle, and chemical composition is by weight percentage:WC:94%,
Co:6.0%.
The mass percent of 20 steel of preset interior cover material, chemical composition and each ingredient is C:0.02%, surplus is
Iron and inevitable impurity.
A kind of preparation method of high abrasion cermet composite roll set, specifically includes following steps:
Step 1, the preparation of ceramic-metal composite enhancing block:
(1) ceramic-metal composite enhancing block used by enhancing ceramic phase particle be WC particle, grain size be 2~
4mm, bending strength 1850MPa, hardness 92HRA.By weight, enhance particle:Wear resistant alloy powders=1:4, it weighs
Enhance particle and wear resistant alloy powders, be put into mixed powder machine and mix powder, it is 2h to mix the powder time, obtains mixed material;
(2) part of the mixed material is put into cylindrical corundum crucible bottom, the bottom T-shape stainless steel part (316L) is Φ
The disk of 40mm × 5mm, top are Φ 3mm × 120mm cylinders, and upside down uses mixture in Φ 50mm × 80mm crucibles
Material fills up crucible, the crucible for filling up material is obtained, as shown in Fig. 1 (a);
(3) will be filled with material crucible be put into first vacuumize, then pass to argon gas as protection gas atmosphere protection stove in
It is sintered, sintering temperature is 1100 DEG C, sintering time 8h, obtains ceramic-metal composite enhancing block, prepared
Ceramic-metal composite enhances shown in block such as Fig. 1 (b).
Step 2, high abrasion cermet composite roll covers preset inner sleeve cast:
(1) 20 steel are selected, according to common pouring technology, the preset inner sleeve for carrying out high abrasion cermet composite roll set is poured
Note, size are upper surface outer diameter 0.5m, internal diameter 0.4m, lower surface outer diameter 0.4m, internal diameter 0.3m, preset inner sleeve height 0.9m.
(2) oxide skin that high abrasion cermet composite roll covers preset inner sleeve surface is removed using mechanical processing mode, used
Alcohol or acetone soln cleaning, the high abrasion cermet composite roll for obtaining size requirement cover preset inner sleeve.
Step 3, prepared by sand mold:
(1) internal diameter of sand mold is the outer diameter of high abrasion cermet composite roll set, and the height of sand mold is made pottery than high abrasion metal
The height of porcelain composite roll set is high by 15%, meanwhile, bottom setting and the high abrasion cermet composite roll of sand mold cover outside preset inner sleeve
The cylinder shape groove of the identical size of diameter, the depth of groove are the 5% of preset inner sleeve height.Use emergy, chromite sand, clay
And suitable quantity of water, mixing, sand mold 3 is manufactured, sand mold uses prefabricated wood pattern molding, the quality hundred of raw material and each raw material that sand mold includes
Point ratio is:Molding sand:75%, clay:14%, surplus is water, and filling CO 2 gas cures after moulding, then takes wooden model
Go out.
The size of sand mold will be closed with the preset inner sleeve matching size in step 2, and sand mold internal diameter is 0.65m, thickness 0.3m, bottom
Portion is reserved with the cylinder shape groove 5 of size identical as preset inner sleeve lower surface outer diameter in step 2, and the depth of groove 5 is 0.045m.
Block is enhanced according to the ceramic-metal composite of high abrasion cermet composite roll set on the cavity inner wall of sand mold
T-shape stainless steel trough 4 is set, and the size and shape of T-shape stainless steel trough is determined according to T-shape stainless steel part.
(2) after sand mold makes, mold cavity surface brush oxygenerating aluminium fireproof coating, drying of lighting a fire, then be placed in baker and dry,
Drying temperature is 300 DEG C, time 8h, for use after its cooling.
Step 4, high abrasion cermet composite roll set housing cast:
(1) WC particle enhancing Cr, C cermet enhancing block in step 1 is uniformly inserted into the designated position of sand mold.
(2) the preset inner sleeve for the high abrasion cermet composite roll set that step 2 cast obtains is positioned over what step 3 manufactured
In groove in sand mold, whole be pushed into blast furnace is preheated, the casting mold after being preheated;Wherein, preheating temperature is
200 DEG C, preheating time 6h;
(3) use electric arc furnaces in 1500 DEG C of melting highly wear-resisting alloy steel molten steel, the chemical composition of molten steel is according to weight percent
For:C:1.0%, Mo:2.0%, Mn:0.5%, Cr:8.0%, V:3.0%, Si:1%, P:0.02%, S:0.01%, remaining is
Fe and inevitable impurity carry out Metamorphism treatment using refining deterioration agent before coming out of the stove to high alloy molten steel.
(4) it after highly wear-resisting alloy steel molten steel is come out of the stove, is burnt and is noted using gravity, pouring temperature is 1400 DEG C, after being poured into preheating
Casting mold housing pouring area 6 in, be cooled to room temperature, carry out sand removal processing, and ceramic-metal composite enhances block
T-shape stainless steel part be inserted into sand mold part cut off, high abrasion cermet composite roll set after cooling will be obtained;
Step 5, the heat treatment of tapered Vertical Mill high abrasion cermet composite roll set:
(1) high abrasion cermet composite roll after cooling is covered in push-in high temperature furnace and is carried out at integral high-temperature diffusion annealing
Reason, air-cooled, the high abrasion cermet composite roll set after being annealed;Wherein, annealing temperature is 1050 DEG C, and annealing time is
10h;
(2) composite roll is covered and carries out quenching treatment, hardening heat is 900 DEG C, air-cooled after heat preservation 9h;
(3) composite roll is covered and carries out temper, temperature is 550 DEG C, air-cooled after heat preservation 9h.
The high abrasion cermet composite roll set prepared through above-mentioned technique, as shown in fig. 7, housing cermet composite wood
The matrix hardness of material enhancing block is 706HV, and ceramic particle hardness is 1509HV, and interface hardness is 1000HV, pouring area hardness
960HV, it is 4J/mm that composite roll, which covers impact flexibility,2, the shear strength between preset inner sleeve and housing is 500MPa.In this temperature
Lower casting, which is oozed, to work well, and casting oozes region without end casting.The wear-resisting working region thickness of this high abrasion composite wood is controllable, ceramics
Grain is evenly distributed, and improves the wearability of tapered vertical mill roller set to greatest extent, can reach vertical grinding roll cover under adverse circumstances
Use condition.
Embodiment 2
A kind of high abrasion cermet composite roll set is a kind of high abrasion cermet roller sleeve of high pressure roller grinder, for height
In pressure roller grinding machine comprising the material of preset inner sleeve and housing, preset inner sleeve is 20 steel, and housing mould material is high-wear-resistant alloy
Enhance block with ceramic-metal composite;Housing wall thickness is that high abrasion cermet composite roll covers the 1/3 of whole wall thickness;
The ceramic-metal composite enhancing block includes enhancing particle, and Cr, Mn wear resistant alloy powders and T-shape are not
Become rusty steel part;The ZTA ceramic particles are as reinforced phase, and Cr, Mn wear resistant alloy powders are as matrix, in mass ratio,
ZTA ceramic particles:Wear resistant alloy powders=1:4;The T-shape stainless steel part is fixing piece, specially 316L types;
The basis material of the described ceramic-metal composite enhancing block, ingredient that wear resistant alloy powders contain and each
The mass percent of ingredient is:C:6.0%, Si:0.1%, Cr:4.0%, Mo:10%, Ti:3.0%, W:2.0%, P:
0.02%, S:0.01%, remaining is iron and inevitable impurity.
Ceramic particle is selected as ZTA ceramic particles, and grain size is the quality percentage of 10 mesh, chemical composition and each ingredient
Than for:Al2O3For 55~60%, ZrO2It is 35~39%, inevitable impurity≤1%.
The mass percent of 20 steel of preset interior cover material, chemical composition and each ingredient is C:0.02%, surplus is
Iron and inevitable impurity.
A kind of preparation method of high abrasion cermet composite roll set, specifically includes following steps:
Step 1, the preparation of ceramic-metal composite enhancing block:
(1) enhancing ceramic phase particle used by ceramic-metal composite enhancing block is ZTA ceramic particles, and grain size is
2~4mm, bending strength 1850MPa, hardness 92HRA.By weight, ZTA ceramic particles:Wear resistant alloy powders=1:
2, enhancing particle and wear resistant alloy powders are weighed, is put into mixed powder machine and mixes powder, it is 3h to mix the powder time, obtains mixed material;
(2) part of the mixed material is put into cylindrical corundum crucible bottom, the bottom T-shape stainless steel part (316L) is Φ
The disk of 40mm × 5mm, top are Φ 3mm × 120mm cylinders, and upside down uses mixture in Φ 50mm × 80mm crucibles
Material fills up crucible, obtains the crucible for filling up material;
(3) will be filled with material crucible be put into first vacuumize, then pass to argon gas as protection gas atmosphere protection stove in
It is sintered, sintering temperature is 1500 DEG C, sintering time 6h, obtains ceramic-metal composite enhancing block.
Step 2, high abrasion cermet composite roll covers preset inner sleeve cast:
(1) 20 steel are selected, according to common pouring technology, carry out pouring for the preset inner sleeve of high abrasion cermet composite roll set
Note, size are outer diameter 0.5m, inner sleeve 0.4m, preset inner sleeve height 0.9m.
(2) oxide skin that high abrasion cermet composite roll covers preset inner sleeve surface is removed using mechanical processing mode, used
Alcohol or acetone soln cleaning, the high abrasion cermet composite roll that specified size is made cover preset inner sleeve.
Step 3, prepared by sand mold:
(1) internal diameter of sand mold is the outer diameter of high abrasion cermet composite roll set, and the height of sand mold is made pottery than high abrasion metal
The height of porcelain composite roll set is high by 10%, meanwhile, the preset inner sleeve of the bottom setting and high abrasion cermet composite roll set of sand mold
The cylinder shape groove of the identical size of outer diameter, the depth of groove are the 3% of preset inner sleeve height.Using emergy, chromite sand, glue
Soil and suitable quantity of water, mixing manufacture sand mold, and sand mold uses prefabricated wood pattern molding, the quality of raw material and each raw material that sand mold includes
Percentage is:Molding sand:80%, clay:10%, surplus is water, and filling CO 2 gas cures after moulding, then by wooden model
It takes out.
The size of sand mold will be closed with the preset inner sleeve matching size in step 2, and sand mold internal diameter is 0.65m, thickness 0.3m, bottom
Portion is reserved with the cylinder shape groove of size identical as preset inner sleeve lower surface outer diameter in step 2, and the depth of groove is 0.027m.
Block is enhanced according to the ceramic-metal composite of high abrasion cermet composite roll set on the cavity inner wall of sand mold
T-shape stainless steel trough is set, and the size and shape of T-shape stainless steel trough is determined according to T-shape stainless steel part.
(2) after sand mold makes, mold cavity surface brush oxygenerating aluminium fireproof coating, drying of lighting a fire, then sand mold is placed in baker
Middle drying, drying temperature are 700 DEG C, time 2h, for use after its cooling.
Step 4, high abrasion cermet composite roll set housing cast:
(1) ZTA particles enhancing Cr, Mn cermet enhancing block in step 1 is uniformly inserted into the designated position of sand mold.
(2) the preset inner sleeve for the high abrasion cermet composite roll set that step 2 cast obtains is positioned over what step 3 manufactured
In groove in sand mold, whole be pushed into blast furnace is preheated, the casting mold after being preheated;Wherein, preheating temperature is
600 DEG C, preheating time 2h;
(3) use electric arc furnaces in 1700 DEG C of melting highly wear-resisting alloy steel molten steel, the chemical composition of molten steel is according to weight percent
For:C:1.0%, Mo:2.0%, Mn:0.5%, Cr:16%, W:2.0%, Si:1.0%, P:0.02%, S:0.01%, remaining
For Fe and inevitable impurity, Metamorphism treatment is carried out to high alloy molten steel using refining deterioration agent before coming out of the stove.
(4) it after highly wear-resisting alloy steel molten steel is come out of the stove, is burnt and is noted using gravity, pouring temperature is 1600 DEG C, after being poured into preheating
Casting mold housing pouring area in, be cooled to room temperature, carry out sand removal processing, and ceramic-metal composite enhancing block
The part that T-shape stainless steel part is inserted into sand mold is cut off, and high abrasion cermet composite roll set after cooling will be obtained;
Step 5, the heat treatment of high abrasion cermet composite high pressure roller mill roller set:
(1) high abrasion cermet composite roll after cooling is covered in push-in high temperature furnace and is carried out at integral high-temperature diffusion annealing
Reason, air-cooled, the high abrasion cermet composite roll set after being annealed;Wherein, annealing temperature is 1400 DEG C, and annealing time is
10h;
(2) composite roll is covered and carries out quenching treatment, hardening heat is 1000 DEG C, air-cooled after heat preservation 10h;
(3) composite roll is covered and carries out temper, temperature is 450 DEG C, air-cooled after heat preservation 12h.
The high-pressure anti-wear machine composite roll set prepared through above-mentioned technique, housing ceramic-metal composite enhance the base of block
Body hardness is 701HV, and ceramic particle hardness is 1400HV, and interface hardness is 980HV, and pouring area hardness is 920HV, composite roll set
Impact flexibility is 8J/mm2, the shear strength between preset inner sleeve and housing is 650MPa..The gained composite wood after high temperature casting is oozed
Material end is cracked, and it is apparent metallurgical binding to enhance ZTA particles and FeMnCr basal body interfaces in block, as the electronics of Fig. 9 is visited
Shown in needle picture, therefore the roller sleeve of high pressure roller grinder that the method is prepared meets the use condition that high abrasion crushes.
Embodiment 3
A kind of high abrasion cermet composite roll set is a kind of high abrasion cermet composite high pressure roller mill roller set, is used
In high-pressure roller mill comprising the material of preset inner sleeve and housing, preset inner sleeve is 20 steel, and housing mould material is high abrasion
Alloy and ceramic-metal composite enhance block;Housing wall thickness is that high abrasion cermet composite roll covers the 1/4 of whole wall thickness;
The ceramic-metal composite enhancing block includes enhancing particle, and Cr, Mo wear resistant alloy powders and T-shape are not
Become rusty steel part;The Al2O3White fused alumina+Al2O3Brown Alundum is as reinforced phase, and Cr, Mo wear resistant alloy powders are as base
Body, in mass ratio, Al2O3White fused alumina:Al2O3Brown Alundum:Wear resistant alloy powders=0.5:0.5:4;The T-shape stainless steel
Part is fixing piece, specially 316L types;
The basis material of the described ceramic-metal composite enhancing block, ingredient that wear resistant alloy powders contain and each
The mass percent of ingredient is:C:1.5%, Si:0.5%, Cr:10%, Mo:10%, Ti:1.0%, Nb:3.0%, P:
0.02%, S:0.01%, remaining is iron and inevitable impurity.
Ceramic particle is selected as Al2O3White fused alumina+Al2O3Brown Alundum particle, grain size are 1~3mm, and chemical composition is
Al2O3:99wt.% or more contains a small amount of iron oxide, silica etc. and inevitable impurity.
The mass percent of 20 steel of preset interior cover material, chemical composition and each ingredient is C:0.02%, surplus is
Iron and inevitable impurity.
A kind of preparation method of high abrasion cermet composite roll set, specifically includes following steps:
Step 1, the preparation of ceramic-metal composite enhancing block:
(1) enhancing ceramic phase particle used by ceramic-metal composite enhancing block is Al2O3White fused alumina+Al2O3Palm fibre
Corundum in granules, grain size are 0.5~2mm, 3.6~3.8gcm of bulk density-3, elastic bullet amount be 350~370 × 106MPa,
Fracture toughness is 1~5.0MPaM1/2, hardness be 1800~2000HV, coefficient of thermal expansion is 7.0~8.4 × 10-6.By weight
Than Al2O3White fused alumina:Al2O3Brown Alundum particle:Wear resistant alloy powders=0.5:0.5:1, weigh enhancing particle and antifriction alloy
Powder is put into mixed powder machine and mixes powder, and it is 4h to mix the powder time, obtains mixed material;
(2) part of the mixed material is put into Noah's ark corundum crucible bottom, the bottom T-shape stainless steel part (316L) is 100mm
The square piece of × 60mm × 5mm, top are Φ 3mm × 120mm cylinders, and upside down is used in 120mm × 80mm × 40mm crucibles
Mixed material fills up crucible, obtains the crucible for filling up material;
(3) will be filled with material crucible be put into first vacuumize, then pass to argon gas as protection gas atmosphere protection stove in
It is sintered, sintering temperature is 1200 DEG C, sintering time 20h, obtains ceramic-metal composite enhancing block, prepared
Ceramic-metal composite enhances shown in block sectional structure chart such as Fig. 1 (c).
Step 2, high abrasion cermet composite roll covers preset inner sleeve cast:
(1) 20 steel are selected, pouring for the preset inner sleeve of high abrasion cermet composite roll set is carried out according to common pouring technology
Note, size are outer diameter 0.5m, internal diameter 0.4m, preset inner sleeve height 0.9m.
(2) oxide skin that high abrasion cermet composite roll covers preset inner sleeve surface is removed using mechanical processing mode, used
Alcohol or acetone soln cleaning, prepared high abrasion cermet composite roll cover preset inner sleeve structural schematic diagram, such as Fig. 2
It is shown.
Step 3, prepared by sand mold:
(1) internal diameter of sand mold is the outer diameter of high abrasion cermet composite roll set, and the height of sand mold is made pottery than high abrasion metal
The height of porcelain composite roll set is high by 5%, meanwhile, outside the bottom setting of sand mold and the preset inner sleeve of high abrasion cermet composite roll set
The cylinder shape groove of the identical size of diameter, the depth of groove are the 8% of preset inner sleeve height.Use emergy, chromite sand, clay
And suitable quantity of water, mixing, sand mold is manufactured, sand mold uses prefabricated wood pattern molding, the quality hundred of raw material and each raw material that sand mold includes
Point ratio is:Molding sand:78%, clay:12%, surplus is water, and filling CO 2 gas cures after moulding, then takes wooden model
Go out.
The size of sand mold will be closed with the preset inner sleeve matching size in step 2, and sand mold internal diameter is 0.65m, thickness 0.3m, bottom
Portion is reserved with the cylinder shape groove of size identical as preset inner sleeve lower surface outer diameter in step 2, and the depth of groove is 0.072m, such as
Shown in Fig. 3.
Block is enhanced according to the ceramic-metal composite of high abrasion cermet composite roll set on the cavity inner wall of sand mold
T-shape stainless steel trough is set, and the size and shape of T-shape stainless steel trough is determined according to T-shape stainless steel part.
(2) after sand mold makes, mold cavity surface brush oxygenerating aluminium fireproof coating, drying of lighting a fire, then sand mold is placed in baker
Middle drying, drying temperature are 500 DEG C, time 4h, for use after its cooling.
Step 4, high abrasion cermet composite roll set housing cast:
(1) by the Al in step 12O3White fused alumina+Al2O3It is uniform that Brown Alundum particle enhances Cr, Mo cermet enhancing block
It is inserted into the designated position of sand mold, as shown in Figure 4.
(2) the preset inner sleeve for the high abrasion cermet composite roll set that step 2 cast obtains is positioned over what step 3 manufactured
In groove in sand mold, as shown in figure 4, whole be pushed into blast furnace is preheated, the casting mold after being preheated;Wherein,
Preheating temperature is 500 DEG C, preheating time 3h;
(3) use electric arc furnaces in 1600 DEG C of melting highly wear-resisting alloy steel molten steel, the chemical composition of molten steel is according to weight percent
For:C:3.5%, Mo:2.0%, Mn:1.0%, Cr:2.0%, Ni:1.0%, W:2.0%, Si:1.0%, P:0.02%, S:
0.01%, remaining is Fe and inevitable impurity, and Metamorphism treatment is carried out to high alloy molten steel using refining deterioration agent before coming out of the stove.
(4) highly wear-resisting alloy steel molten steel is come out of the stove to be burnt using gravity and be noted, and pouring temperature is 1500 DEG C, is poured into pouring after preheating
In the housing pouring area 6 of injection molding tool, it is cooled to room temperature, carries out sand removal processing, and " T " of ceramic-metal composite enhancing block
The part that type stainless steel part is inserted into sand mold is cut off, and the side view for obtaining high abrasion cermet composite roll set after cooling is cutd open
View, overhead sectional view difference are as shown in Figure 5,6;
Step 5, the heat treatment of high abrasion composite high pressure roller mill roller set:
(1) high abrasion cermet composite roll after cooling is covered in push-in high temperature furnace and is carried out at integral high-temperature diffusion annealing
Reason, air-cooled, the high abrasion cermet composite roll set after being annealed;Wherein, annealing temperature is 1200 DEG C, and annealing time is
12h;
(2) composite roll is covered and carries out quenching treatment, hardening heat is 950 DEG C, air-cooled after heat preservation 9.5h;
(3) composite roll is covered and carries out temper, temperature is 350 DEG C, air-cooled after keeping the temperature 10 hours.
The high abrasion cermet composite roll set prepared through above-mentioned technique, ceramic-metal composite enhance the base of block
Body hardness is 780HV, and ceramic particle hardness is 1590HV, and interface hardness is 1100HV, and pouring area hardness is 920HV, composite roll
Set impact flexibility is 6J/mm2, the shear strength between preset inner sleeve and housing is 550MPa..What is prepared at this temperature is compound
Gained composite material flawless generates after there is material more excellent wearability, high temperature casting to ooze, and particle is smelting with basal body interface
Gold combines, and apparent bonding interface layer occurs, and the composite material that the method is prepared meets the use condition of high abrasion.
Embodiment 4
A kind of high abrasion cermet composite roll set is a kind of high abrasion cermet composite high pressure roller mill roller set, is used
In high-pressure roller mill comprising the material of preset inner sleeve 2 and housing, preset inner sleeve is 20 steel, and housing mould material is high resistance to
Break-in gold and ceramic-metal composite enhance block;Housing wall thickness is that high abrasion cermet composite roll covers the 1/ of whole wall thickness
2;
The ceramic-metal composite enhancing block 1 includes enhancing particle 1-2, Cr, Mo, Mn wear resistant alloy powders 1-
3 and T-shape stainless steel part 1-1;The B4C particles are as reinforced phase, and Cr, Mo, Mn wear resistant alloy powders are as base
Body, in mass ratio, B4C particles:Wear resistant alloy powders=1:3;The T-shape stainless steel part is fixing piece, specially 316L
Type;
The basis material of the described ceramic-metal composite enhancing block, ingredient that wear resistant alloy powders contain and each
The mass percent of ingredient is:C:2.0%, Si:0.8%, Cr:5.0%, Mo:6.0%, Mn:20%, Ti:10%, Nb:
1.0%, P:0.02%, S:0.01%, remaining is iron and inevitable impurity.
Ceramic particle is selected as B4C particles, grain size are 0.1~2mm.
The mass percent of 20 steel of preset interior cover material, chemical composition and each ingredient is C:0.02%, surplus is
Iron and inevitable impurity.
A kind of preparation method of high abrasion cermet composite roll set, specifically includes following steps:
Step 1, the preparation of ceramic-metal composite enhancing block:
(1) enhancing ceramic phase particle used by ceramic-metal composite enhancing block is B4C particles, by weight,
B4C particles:Wear resistant alloy powders=1:3, enhancing particle and wear resistant alloy powders are weighed, is put into mixed powder machine and mixes powder, when mixing powder
Between be 3h, obtain mixed material;
(2) part of the mixed material is put into hexagonal column shape corundum crucible bottom, the bottom T-shape stainless steel part (316L) is Φ
The disk of 60mm × 5mm, top are Φ 3mm × 120mm cylinders, and upside down is 60mm, in the crucible of a height of 80mm in the length of side,
Crucible is filled up with mixed material, obtains the crucible for filling up material;
(3) will be filled with material crucible be put into first vacuumize, then pass to argon gas as protection gas atmosphere protection stove in
It is sintered, sintering temperature is 1350 DEG C, sintering time 10h, obtains ceramic-metal composite enhancing block, prepared
Ceramic-metal composite enhances shown in block such as Fig. 1 (d).
Step 2, high abrasion cermet composite roll covers preset inner sleeve cast:
(1) 20 steel are selected, pouring for the preset inner sleeve of high abrasion cermet composite roll set is carried out according to common pouring technology
Note, size are outer diameter 0.5m, internal diameter 0.4m, preset inner sleeve height 0.9m.
(2) oxide skin that high abrasion cermet composite roll covers preset inner sleeve surface is removed using mechanical processing mode, used
Alcohol or acetone soln cleaning, the high abrasion cermet composite roll for obtaining size requirement cover preset inner sleeve.
Step 3, prepared by sand mold:
(1) internal diameter of sand mold is the outer diameter of high abrasion cermet composite roll set, and the height of sand mold is made pottery than high abrasion metal
The height of porcelain composite roll set is high by 12%, meanwhile, the preset inner sleeve of the bottom setting and high abrasion cermet composite roll set of sand mold
The cylinder shape groove of the identical size of outer diameter, the depth of groove are the 6% of preset inner sleeve height.Using emergy, chromite sand, glue
Soil and suitable quantity of water, mixing manufacture sand mold, and sand mold uses prefabricated wood pattern molding, the quality of raw material and each raw material that sand mold includes
Percentage is:Molding sand:76%, clay:13%, surplus is water, and filling CO 2 gas cures after moulding, then by wooden model
It takes out.
The size of sand mold will be closed with the preset inner sleeve matching size in step 2, and sand mold internal diameter is 0.65m, thickness 0.3m, bottom
Portion is reserved with the cylinder shape groove of size identical as preset inner sleeve lower surface outer diameter in step 2, and the depth of groove is 0.054m.
Block is enhanced according to the ceramic-metal composite of high abrasion cermet composite roll set on the cavity inner wall of sand mold
T-shape stainless steel trough is set, and the size and shape of T-shape stainless steel trough is determined according to T-shape stainless steel part.
(2) after sand mold makes, mold cavity surface brush oxygenerating aluminium fireproof coating, drying of lighting a fire, then sand mold is placed in baker
Middle drying, drying temperature are 600 DEG C, time 6h, for use after its cooling.
Step 4, high abrasion cermet composite roll set housing cast:
(1) by the B in step 14C particles enhancing Cr, Mo, Mn cermet enhancing block is uniformly inserted into the specific bit of sand mold
It sets.
(2) the high abrasion cermet composite roll that step 2 cast obtains is covered into preset inner sleeve and is positioned over the sand that step 3 manufactures
In groove in type, whole be pushed into blast furnace is preheated, the casting mold after being preheated;Wherein, preheating temperature 350
DEG C, preheating time 5h;
(3) use electric arc furnaces in 1500 DEG C of melting highly wear-resisting alloy steel molten steel, the chemical composition of molten steel is according to weight percent
For:C:3.0%, Mo:10%, Mn:0.5%, Cr:3%, V:10%, W:20%, Si:0.1%, P:0.02%, S:0.01%,
Remaining is Fe and inevitable impurity, and Metamorphism treatment is carried out to high alloy molten steel using refining deterioration agent before coming out of the stove.
(4) it after highly wear-resisting alloy steel molten steel is come out of the stove, is burnt and is noted using gravity, pouring temperature is 1450 DEG C, after being poured into preheating
Casting mold housing pouring area in, be cooled to room temperature, carry out sand removal processing, and ceramic-metal composite enhancing block
The part that T-shape stainless steel part is inserted into sand mold is cut off, and high abrasion cermet composite roll set after cooling will be obtained;
Step 5, the heat treatment of high abrasion cermet composite high pressure roller mill roller set:
(1) high abrasion cermet composite roll after cooling is covered in push-in high temperature furnace and is carried out at integral high-temperature diffusion annealing
Reason, air-cooled, the high abrasion cermet composite roll set after being annealed;Wherein, annealing temperature is 1100 DEG C, and annealing time is
10.5h;
(2) composite roll is covered and carries out quenching treatment, hardening heat is 920 DEG C, air-cooled after heat preservation 10h;
(3) composite roll is covered and carries out temper, temperature is 400 DEG C, air-cooled after heat preservation 11h.
Cermet composite roll set is prepared through above-mentioned technique to have excellent performance, ceramic-metal composite enhances the base of block
Body hardness is 800HV, and ceramic particle hardness is 1550HV, and interface hardness is 1090HV, and pouring area hardness is 940HV, composite roll
Set impact flexibility is 7J/mm2, the shear strength between preset inner sleeve and housing is 600MPa..Due to ceramic particle and metal phase
Between linear expansion coefficient mismatch, therefore in preparation process generate abundant residues stress, pass through above-mentioned heat treatment end find
The generation of formation of crack, improves the macro-mechanical property of material, and the composite roll set that the method is prepared meets high abrasion crushing
Use condition.
Embodiment 5
A kind of high abrasion cermet composite roll set is a kind of high abrasion cermet roller sleeve of high pressure roller grinder, for height
In pressure roller grinding machine comprising the material of preset inner sleeve and housing, preset inner sleeve is 20 steel, and housing mould material is high-wear-resistant alloy
Enhance block with ceramic-metal composite;Housing wall thickness is that high abrasion cermet composite roll covers the 1/5 of whole wall thickness;
The ceramic-metal composite enhancing block includes enhancing particle, and W, V wear resistant alloy powders and T-shape are stainless
Steel part;The TiC grains are as reinforced phase, and W, V wear resistant alloy powders are as matrix, in mass ratio, TiC
Grain:Wear resistant alloy powders=1:4;The T-shape stainless steel part is fixing piece, specially 316L types;
The basis material of the described ceramic-metal composite enhancing block, ingredient that wear resistant alloy powders contain and each
The mass percent of ingredient is:C:4.0%, Si:0.8%, Cr:5.0%, Ni:20%, V:10%, W:20%, P:0.02%,
S:0.01%, remaining is iron and inevitable impurity.
Ceramic particle is selected as TiC particles, and grain size is 0.1~1mm.
The mass percent of 20 steel of preset interior cover material, chemical composition and each ingredient is C:0.02%, surplus is
Iron and inevitable impurity.
A kind of preparation method of high abrasion cermet composite roll set, specifically includes following steps:
Step 1, the preparation of ceramic-metal composite enhancing block:
(1) enhancing ceramic phase particle used by ceramic-metal composite enhancing block is TiC particles, by weight,
Enhance particle:Wear resistant alloy powders=1:4, enhancing particle and wear resistant alloy powders are weighed, is put into mixed powder machine and mixes powder, when mixing powder
Between be 4h, obtain mixed material;
(2) part of the mixed material is put into hexagonal column shape corundum crucible bottom, the bottom T-shape stainless steel part (316L) is Φ
The disk of 60mm × 5mm, top are Φ 3mm × 120mm cylinders, and upside down is 60mm, in the crucible of a height of 80mm in the length of side,
Crucible is filled up with mixed material, obtains the crucible for filling up material;
(3) will be filled with material crucible be put into first vacuumize, then pass to argon gas as protection gas atmosphere protection stove in
It is sintered, sintering temperature is 1200 DEG C, sintering time 15h, obtains ceramic-metal composite enhancing block.
Step 2, high abrasion cermet composite roll covers preset inner sleeve cast:
(1) preferable 20 steel of toughness is selected, the pre- of high abrasion cermet composite roll set is carried out according to common pouring technology
The cast of inner sleeve is set, size is outer diameter 0.5m, internal diameter 0.4m, preset inner sleeve height 0.9m.
(2) oxide skin that high abrasion cermet composite roll covers preset inner sleeve surface is removed using mechanical processing mode, used
Alcohol or acetone soln cleaning, the high abrasion cermet composite roll that specified size is made cover preset inner sleeve.
Step 3, prepared by sand mold:
(1) internal diameter of sand mold is the outer diameter of high abrasion cermet composite roll set, and the height of sand mold is made pottery than high abrasion metal
The height of porcelain composite roll set is high by 15%, meanwhile, bottom setting and the high abrasion cermet composite roll of sand mold cover outside preset inner sleeve
The cylinder shape groove of the identical size of diameter, the depth of groove are the 4% of preset inner sleeve height.Use emergy, chromite sand, clay
And suitable quantity of water, mixing, sand mold is manufactured, sand mold uses prefabricated wood pattern molding, the quality hundred of raw material and each raw material that sand mold includes
Point ratio is:Molding sand:75%, clay:12%, surplus is water, and filling CO 2 gas cures after moulding, then takes wooden model
Go out.
The size of sand mold will be closed with the preset inner sleeve matching size in step 2, and sand mold internal diameter is 0.65m, thickness 0.3m, bottom
Portion is reserved with the cylinder shape groove of size identical as preset inner sleeve lower surface outer diameter in step 2, and the depth of groove is 0.036m.
Block is enhanced according to the ceramic-metal composite of high abrasion cermet composite roll set on the cavity inner wall of sand mold
T-shape stainless steel trough is set, and the size and shape of T-shape stainless steel trough is determined according to T-shape stainless steel part.
(2) after sand mold makes, mold cavity surface brush oxygenerating aluminium fireproof coating, drying of lighting a fire, then sand mold is placed in baker
Middle drying, drying temperature are 400 DEG C, time 5h, for use after its cooling.
Step 4, high abrasion cermet composite roll set housing cast:
(1) TiC particles enhancing W, V cermet enhancing block in step 1 is inserted into the designated position of sand mold.
(2) the preset inner sleeve for the high abrasion cermet composite roll set that step 2 cast obtains is positioned over what step 3 manufactured
In groove in sand mold, whole be pushed into blast furnace is preheated, the casting mold after being preheated;Wherein, preheating temperature is
350 DEG C, preheating time 5h;
(3) use electric arc furnaces in 1600 DEG C of melting highly wear-resisting alloy steel molten steel, the chemical composition of molten steel is according to weight percent
For:C:1.8%, Mo:5%, Mn:0.7%, Cr:5%, Nb:3%, Ti:20%, Si:0.5%, P:0.02%, S:0.01%,
Remaining is Fe and inevitable impurity, and Metamorphism treatment is carried out to high alloy molten steel using refining deterioration agent before coming out of the stove.
(4) it after highly wear-resisting alloy steel molten steel is come out of the stove, is burnt and is noted using gravity, pouring temperature is 1500 DEG C, after being poured into preheating
Casting mold housing pouring area in, be cooled to room temperature, carry out sand removal processing, and ceramic-metal composite enhancing block
The part that T-shape stainless steel part is inserted into sand mold is cut off, and high abrasion cermet composite roll set after cooling will be obtained;
Step 5, the heat treatment of high abrasion cermet composite high pressure roller mill roller set:
(1) high abrasion cermet composite roll after cooling is covered in push-in high temperature furnace and is carried out at integral high-temperature diffusion annealing
Reason, air-cooled, the high abrasion cermet composite roll set after being annealed;Wherein, annealing temperature is 1300 DEG C, and annealing time is
11h;
(2) composite roll is covered and carries out quenching treatment, hardening heat is 960 DEG C, air-cooled after heat preservation 9h;
(3) composite roll is covered and carries out temper, temperature is 450 DEG C, air-cooled after heat preservation 10h.
The high abrasion composite roll set prepared through above-mentioned technique, the matrix hardness that ceramic-metal composite enhances block are
790HV, ceramic particle hardness are 1400HV, and interface hardness is 1080HV, and pouring area hardness is 980HV, and composite roll set impact is tough
Property is 5J/mm2, the shear strength between preset inner sleeve and housing is 520MPa..The composite material prepared at this temperature has
More excellent wearability, gained composite material flawless generates after high temperature casting is oozed, and ceramic-metal composite enhances in block
It is metallurgical binding to enhance particle and wear resistant interface, and apparent bonding interface layer occurs, electron probe picture as shown in figure 8,
The composite material that the method is prepared meets the use condition of high abrasion.
Embodiment 6
A kind of high abrasion cermet composite roll set, with embodiment 5, the difference is that, housing cermet composite wood
Material enhancing block be using Cr, V, Mn be strengthen matrix, VC particles as reinforced phase, the high abrasion composite high pressure roller mill roller of preparation
Set, preset inner sleeve use the preferable 20Cr steel of toughness.
The quality for the ingredient and each ingredient that the wear resistant alloy powders of housing ceramic-metal composite enhancing block contain
Percentage is:C:4.0%, Si:0.6%, Cr:8%, Mo:20%, V:8.0%, Mn:15%, P:0.02%, S:0.01%,
Yu Weitie and inevitable impurity.
A kind of preparation method of high abrasion cermet composite roll set, with embodiment 5, the difference is that:
The chemical composition of the highly wear-resisting alloy steel molten steel material of cast is according to weight percent:C:3.0%, Mo:
6.0%, Mn:1%, Cr:8.0%, V:10%, Nb:1.0%, Ti:1.0%, Si:0.5%, P:0.02%, S:0.01%,
Remaining is Fe and inevitable impurity, and Metamorphism treatment is carried out to high alloy molten steel using refining deterioration agent before coming out of the stove.
Embodiment 7
A kind of high abrasion cermet composite roll set, with embodiment 5, the difference is that, housing cermet composite wood
Material enhancing block is to strengthen matrix, Mo with Cr, Ni, Mo2C particles are reinforced phase, the high abrasion composite high pressure roller mill roller of preparation
Set.Preset inner sleeve uses the preferable 40CrMo steel of toughness.
The quality for the ingredient and each ingredient that the wear resistant alloy powders of housing ceramic-metal composite enhancing block contain
Percentage is:C:2.0%, Si:1.0%, Cr:10%, Ni:10%, Mo:10%, P:0.02%, S:0.01%, remaining is iron
And inevitable impurity.
A kind of preparation method of high abrasion cermet composite roll set, with embodiment 5, the difference is that:
The chemical composition of the highly wear-resisting alloy steel molten steel material of cast is according to weight percent:C:2.8%, Mo:10%,
Mn:0.5%, Cr:4.0%, V:2.0%, Nb:1.0%, Ti:3.0%, Si:0.5%, P:0.02%, S:0.01%, remaining is
Fe and inevitable impurity carry out Metamorphism treatment using refining deterioration agent before coming out of the stove to high alloy molten steel.
Embodiment 8
A kind of high abrasion cermet composite roll set, with embodiment 5, the difference is that, housing cermet composite wood
Material enhancing block using W, Mn be strengthen matrix, ZrC particles as reinforced phase, the high abrasion composite high pressure roller mill roller set of preparation, in advance
It sets inner sleeve and uses preferable 40 steel of toughness.
The quality for the ingredient and each ingredient that the wear resistant alloy powders of housing ceramic-metal composite enhancing block contain
Percentage is:C:3.0%, Si:0.5%, Cr:5%, W:18%, Mn:20%, Nb:1.0%, P:0.02%, S:0.01%,
Yu Weitie and inevitable impurity.
A kind of preparation method of high abrasion cermet composite roll set, with embodiment 5, the difference is that:
The chemical composition of the highly wear-resisting alloy steel molten steel material of cast is according to weight percent:C:3.2%, Mo:
5.0%, Mn:0.6%, Cr:6.0%, V:10%, Nb:3%, Ti:2%, Si:0.5%, P:0.02%, S:0.01%, remaining
For Fe and inevitable impurity, Metamorphism treatment is carried out to high alloy molten steel using refining deterioration agent before coming out of the stove.
Embodiment 9
A kind of housing cermet enhancing block is to strengthen matrix, Cr with Ni, Mn3C2Particle is that the high abrasion of reinforced phase is multiple
Roller sleeve of high pressure roller grinder is closed, preset inner sleeve uses the preferable 42CrMoV steel of toughness.
The quality for the ingredient and each ingredient that the wear resistant alloy powders of housing ceramic-metal composite enhancing block contain
Percentage is:C:2.5%, Si:0.3%, Cr:12%, Ni:18%, Mn:20%, Nb:3.0%, P:0.02%, S:0.01%,
Remaining is iron and inevitable impurity.
A kind of preparation method of high abrasion cermet composite roll set, with embodiment 5, the difference is that:
The chemical composition of the highly wear-resisting alloy steel molten steel material of cast is according to weight percent:C:2.9%, Mo:
4.0%, Mn:0.6%, Cr:3.0%, V:1.0%, W:5.0%, Ti:1.0%, Si:0.5%, P:0.02%, S:0.01%,
Remaining is Fe and inevitable impurity, and Metamorphism treatment is carried out to high alloy molten steel using refining deterioration agent before coming out of the stove.
Embodiment 10
A kind of housing cermet enhancing block is that strengthen matrix, SiC particulate multiple as the high abrasion of reinforced phase using Ni, Mn, W
Roller sleeve of high pressure roller grinder is closed, preset inner sleeve uses the preferable Q235 of toughness.
The quality for the ingredient and each ingredient that the wear resistant alloy powders of housing ceramic-metal composite enhancing block contain
Percentage is:C:1.6%, Si:0.5%, W:10%, Mn:20%, Ni:8%, Nb:1.0%, P:0.02%, S:0.01%,
Yu Weitie and inevitable impurity.
A kind of preparation method of high abrasion cermet composite roll set, with embodiment 5, the difference is that:
The chemical composition of the highly wear-resisting alloy steel molten steel material of cast is according to weight percent:C:3.0%, Mo:
8.0%, Mn:0.8%, Cr:3.0%, V:10%, Ni:0.8%, W:12%, Ti:2.0%, Si:0.5%, P:0.02%, S:
0.01%, remaining is Fe and inevitable impurity, and Metamorphism treatment is carried out to high alloy molten steel using refining deterioration agent before coming out of the stove.