CN1974827A - Cold and hot shearing edge steel for shearing thick plate - Google Patents
Cold and hot shearing edge steel for shearing thick plate Download PDFInfo
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- CN1974827A CN1974827A CN 200610098291 CN200610098291A CN1974827A CN 1974827 A CN1974827 A CN 1974827A CN 200610098291 CN200610098291 CN 200610098291 CN 200610098291 A CN200610098291 A CN 200610098291A CN 1974827 A CN1974827 A CN 1974827A
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Abstract
The present invention discloses one kind of cold and hot shearing edge steel for shearing thick plate and its production process. The cold and hot shearing edge steel has properly matched alloy elements and carbon. Its production process includes the following steps: designing alloy, smelting and on-the-spot sample analysis and regulation, ladle refining at 1650-1670 deg.c, casting ingot, forging rod, electroslag remelting and forging into shear edge material. The cold and hot shearing edge steel has high hardness, high strength, high wear resistance, high impact toughness and high red hardness, and is suitable for making shear for shearing cold and hot thick plate.
Description
Technical field
The invention belongs to ferrous metallurgy steel alloy cutlery material, particularly a kind of production that is applicable to the shearing edge steel of the cold shears of shearing plate of moderate thickness, hot shears simultaneously.
Background technology
In steel rolling was produced, shears was the equipment that is used for steel plate (base) is cut into specified dimension, is bringing into play the effect that will weigh in steel plate production.It is oblique blade type shears that the world uses maximum, and its groundwork principle is that two cutting edges up and down are installed on the upper and lower cutter platform, drives upper and lower cutting edge by the relative movement of cutter platform up and down and under pressure steel plate is cut off.Cutting edge bears high loading when work stress, frictional force and surging force also will be born the certain high temperature effect simultaneously.Usually, will be called cold shear, will be called hot-shear blade at the cutting edge of 700～1100 ℃ of work of temperature at the cutting edge of room temperature～400 ℃ work.Main failure forms according to the service condition cutting edge of cutting edge is the cutting edge wearing and tearing, heap sword, tipping, fracture.Therefore the performance requriements to cutting edge is: high rigidity, high strength, high tenacity, high crash-proof.Cutting edge bears stress at work, and heat is turned bent, impacts the effect of complex stresses such as thermal stresses, must guarantee that viscous deformation does not take place from work the time cutting edge.Intensity hardness is the important performance indexes of cutting edge.Usually the hardness of cold shear is about HRC60, and hot-shear blade hardness is in HRC42～50.High-wearing feature, cutting edge bears frictional force when work, and its wear pattern is very complicated, usually based on sliding friction.High wear resistance can guarantee that the geometrical dimension of cutting edge does not change, and can improve the work-ing life of cutting edge.Enough impelling strength, the shock action that cutting edge the time will bear iron and steel repeatedly in work tends to take place that cutting edge peels off or whole fracture, and is especially more fragile when the cold cut slab.High anti-rapid heat cycle of red hardness, thermal conductivity and thermal fatigue resistance.During hot shearing since the iron and steel temperature all more than 700 ℃, cutting edge self temperature when shearing tends to be higher than more than 500～600 ℃, therefore when satisfying high strength, high rigidity, high-wearing feature and enough impelling strength, also require cutting edge to have high red hardness, good thermal conductivity and higher thermal fatigue resistance, it is one group of important performance indexes of hot-shear blade.
At present, cold shears shear-steel commonly used is high-carbon alloy steel, and its metallographic structure is that histogram undissolved carbide on the high-carbon tempered martensite matrix.Mainly contain high-carbon high-alloy shearing edge steel and high-carbon low-alloy shearing edge steel two classes.The high-carbon high-alloy cold shears is representative with steel with Cr12MoV, contains 1.4～2.3%C, 11～13%Cr, also has a spot of Mo and V.This steel hardenability is good, is organized as on the high-carbon tempered martensite matrix histogram after the thermal treatment and a large amount of undissolved carbides, and the hardness high-wearing feature is good, but impact resistance poor (toughness is low), and intensity is not high, easy tipping when shearing plate of moderate thickness and cause cutting edge to lose efficacy.The high-carbon low-alloy cold shears is representative with steel with 7CrMnSiMoV, contains 0.7～0.8%C, and alloying element belongs to polynary a small amount of, is mainly used in raising hardening capacity.Metallographic structure is based on the high-carbon tempered martensite after the thermal treatment, and undissolved carbide quantity seldom though hardness and intensity are higher, wears no resistance, and in use easy bald sword needs the frequent cutting edge of changing when shearing high-strength plate of moderate thickness, and work-ing life is low.
Hot-shear blade steel grade class commonly used is more, because demanding red hardness generally all can contain alloying element W and Mo, can be divided into tungsten (W) substantially is that alloy hot shears shear-steel and chromium (Cr) are alloy hot shears shear-steel.The tungsten based alloy shearing edge steel is with 3Cr
2W
8The V representative, contain 8%W, have high red hardness and heat resistance, because alloying element content is high and be carbide forming element, so carbide quantity is many, the carbide thermostability height of while tungsten, when quenching heating, be difficult to dissolve in austenite, the undissolved carbide of volume is arranged in the tissue after the thermal treatment, and the fragility that has increased steel has reduced the thermal conductivity of steel, and heap sword, tipping and brittle failure easily take place in the use.Chromium alloy hot shears shear-steel is representative with 4CrW2Si and 4Cr5MoVSi etc., and steel interalloy unit is that various types of content is not low yet, but carbon thing comparatively small amt, thermostability is also lower.Undissolved carbide quantity is few after the thermal treatment, and strength and toughness is higher, but matrix interalloy constituent content is lower, thereby red hardness and wear resistance are lower, cutting edge quick abrasion in shearing the plate of moderate thickness process, and work-ing life is lower.
In a word, existing cold shear and hot shears shear-steel, the contradiction between ubiquity wear resistance and the toughness, the cutting edge material that wear resistance is high, poor toughness; Its wear resistance of material is low again preferably for toughness, seems particularly outstanding for cold shears shear-steel contradiction when shearing plate of moderate thickness especially, and the contradiction between wear resistance and the toughness has seriously restricted the raising in cutting edge work-ing life.
Summary of the invention
The purpose of this invention is to provide and a kind ofly have preferably wear resistance and the cold and hot cutting edge of flexible plate of moderate thickness simultaneously with steel and production technique.
The alloy element component of the cold and hot dual-purpose shearing edge steel design of plate of moderate thickness of the present invention is (Wt%): C:0.35～0.60, Si:0.25～1.50, Mn:0.25～1.50, Cr:3.00～7.00, W:1.00～3.50, Mo:1.00～4.50, V:0.50～3.00, Nb:0.50～3.00, Re:0.05～0.15, Cu :≤0.050, P :≤0.025, S :≤0.025, and surplus is Fe.
In the mentioned component scope, the content of main alloy element and carbon, should mate according to the following equation mutually:
The cold and hot dual-purpose shearing edge steel of plate of moderate thickness of the present invention production process:
1, intermediate frequency furnace is smelted
Carry out Alloying Design → purification furnace charge → smelting and on-the-spot sample analysis and whole → 1650 ℃～1670 ℃ ladle refinings (Argon-bottom blowing 4-5 minute) of transferring by above-mentioned alloying element composition and coupling.
2, ingot casting:
1580 ℃～1540 ℃ ingot castings, 880 ℃～750 ℃ demouldings
3, forge bar:
Heating temperature: 1250 ℃～1200 ℃
Initial forging temperature: 1150 ℃～1100 ℃
Final forging temperature: 900 ℃～820 ℃
4, esr:
In order further to improve the mechanical property of cutting edge, bar will be handled through esr, reduces impurity in the steel, improves the cleanliness factor of steel, and adjusts the texture of steel.
5, forging stock material: the starting material (base) that are swaged into cutting edge processing
Heating temperature: 1180 ℃～1140 ℃
Initial forging temperature: 1050 ℃～1000 ℃
Final forging temperature: 900 ℃～850 ℃
Forge the back red annealing of sending.
In order to give full play to the potentiality of alloying element, except the content of correct selection alloying element and mating mutually, the secondary hardening technology that also will adopt the present invention to study is heat-treated, obtain the metallographic structure of the composite alloy carbide that disperse distributes on the carbon tempered martensite matrix in low, guarantee to reach required mechanical property.
Novel high-strength shearing edge steel provided by the invention is compared with the shearing edge steel that uses at present, has following advantage:
1, compare with the cold shears shear-steel of present use, novel shearing edge steel has high strength and very high impelling strength when guaranteeing high rigidity, high patience, in use is difficult for after tipping, cracking, long service life, the reconditioning reusable.
2, compare with the hot shears shear-steel of present use, novel shearing edge steel has higher red hardness, heat resistance and wear resistance, good thermal conductivity, long service life when guaranteeing high impelling strength.
3, because novel shearing edge steel has high rigidity, high strength, high-wearing feature, high impact toughness and red hardness simultaneously, thereby being applicable to making cold shear and hot-shear blade simultaneously, is a kind of cold and hot shearing edge steel of cutting dual-purpose that is used to shear plate of moderate thickness.
Embodiment
Attempt a kind of cold and hot dual-purpose shearing edge steel of cutting---HMB steel below, according to alloy element component (Wt%): C:0.35～0.60, Si:0.25～1.50, Mn:0.25～1.50, Cr:3.00～7.00, W:1.00～3.50, Mo:1.00～4.50, V:0.50～3.00, Nb:0.50～3.00, Re:0.05～0.15, Cu :≤0.050, P :≤0.025, S :≤0.025, surplus is Fe.In the mentioned component scope, the content of main alloy element and carbon, should mate according to the following equation mutually:
According to stating alloying element composition and matching relationship, the alloy total content coefficient that HMB steel of the present invention adopts is 0.682, and itself and carbon alloy equivalence ratio are 0.733～0.88.
The technological process of production of HMB steel cutting edge is as follows:
1, intermediate frequency furnace is smelted
Carry out Alloying Design → purification furnace charge → smelting and on-the-spot sample analysis and whole → 1650 ℃～1670 ℃ ladle refinings (Argon-bottom blowing 4-5 minute) of transferring by above-mentioned alloying element composition and coupling.
2, ingot casting:
1580 ℃～1540 ℃ ingot castings, 880 ℃～750 ℃ demouldings
3, forge bar:
Heating temperature: 1250 ℃～1200 ℃
Initial forging temperature: 1150 ℃～1100 ℃
Final forging temperature: 900 ℃～820 ℃
4, esr: in order further to improve the mechanical property of cutting edge, bar will be handled through esr, reduces impurity in the steel, improves the cleanliness factor of steel, and adjusts the texture of steel.
5, forging stock material: the starting material (base) that are swaged into cutting edge processing
Heating temperature: 1180 ℃～1140 ℃
Initial forging temperature: 1050 ℃～1000 ℃
Final forging temperature: 900 ℃～850 ℃
Forge the back red annealing of sending.
Comprehensive thermal treatment process is: normalizing temperature: 1120～1150 ℃, and high tempering: 640～680 ℃; Quenching temperature: 1050～1070 ℃, oil cooling; Tempering temperature: 530-570 ℃, air cooling, tempering 2～3 times.Hardness is HRC60～63 after the thermal treatment, α kv:11～15J/cm
2
Claims (1)
1, a kind of shearing edge steel production technique that is used to shear plate of moderate thickness is characterized in that described shearing edge steel alloy element component is (wt%): C:0.30～0.60, Si:0.25～1.50, Mn:0.25～1.50, Cr:3.00～7.00, W:1.00～3.50, Mo:1.00～4.50, V:0.50～3.00, Nb:0.50～3.00, Cu :≤0.050, P :≤0.025, S :≤0.025, surplus is Fe; In the mentioned component scope, the content of main alloy element and carbon, should mate according to the following equation mutually:
Production process according to the shearing edge steel of above-mentioned requirements is:
(1), intermediate frequency furnace is smelted
Alloying Design → purification furnace charge → smelting and on-the-spot sample analysis and whole → 1650 ℃～1670 ℃ ladle refinings (Argon-bottom blowing 4-5 minute) of transferring;
(2), ingot casting:
1580 ℃～1540 ℃ ingot castings, 880 ℃～750 ℃ demouldings;
(3), forge bar:
Heating temperature: 1250 ℃～1200 ℃
Initial forging temperature: 1150 ℃～1100 ℃
Final forging temperature: 900 ℃～820 ℃
(4), esr:
In order further to improve the mechanical property of cutting edge, bar will be handled through esr, reduces impurity in the steel, improves the cleanliness factor of steel, and adjusts the texture of steel;
(5), forging stock material: the starting material (base) that are swaged into cutting edge processing
Heating temperature: 1180 ℃～1140 ℃
Initial forging temperature: 1050 ℃～1000 ℃
Final forging temperature: 900 ℃～850 ℃
Forge the back red annealing of sending.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006100982918A CN100462469C (en) | 2006-12-11 | 2006-12-11 | Cold and hot shearing edge steel for shearing thick plate |
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| CNB2006100982918A CN100462469C (en) | 2006-12-11 | 2006-12-11 | Cold and hot shearing edge steel for shearing thick plate |
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| CN1974827A true CN1974827A (en) | 2007-06-06 |
| CN100462469C CN100462469C (en) | 2009-02-18 |
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| CNB2006100982918A Active CN100462469C (en) | 2006-12-11 | 2006-12-11 | Cold and hot shearing edge steel for shearing thick plate |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102308014A (en) * | 2009-02-10 | 2012-01-04 | 盖伯.施马克坦贝格有限公司 | Steel alloy |
| CN103180075A (en) * | 2010-09-30 | 2013-06-26 | 丹尼尔和科菲森梅克尼齐有限公司 | Shear for shearing rolled products and associated production process |
| CN108018491A (en) * | 2017-12-19 | 2018-05-11 | 马鞍山市申力特重工机械股份有限公司 | Processing method with high-strength tenacity longitudinal shearing slitting blade |
| CN109321715A (en) * | 2018-10-29 | 2019-02-12 | 马鞍山市申力特重工机械股份有限公司 | A kind of wear-resisting roll-type hot rolling blade of high red hardness |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87107114A (en) * | 1987-10-22 | 1988-05-18 | 华中工学院 | High strength and tenacity, low-alloy cold-forming die steel |
-
2006
- 2006-12-11 CN CNB2006100982918A patent/CN100462469C/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102308014A (en) * | 2009-02-10 | 2012-01-04 | 盖伯.施马克坦贝格有限公司 | Steel alloy |
| CN103180075A (en) * | 2010-09-30 | 2013-06-26 | 丹尼尔和科菲森梅克尼齐有限公司 | Shear for shearing rolled products and associated production process |
| CN108018491A (en) * | 2017-12-19 | 2018-05-11 | 马鞍山市申力特重工机械股份有限公司 | Processing method with high-strength tenacity longitudinal shearing slitting blade |
| CN109321715A (en) * | 2018-10-29 | 2019-02-12 | 马鞍山市申力特重工机械股份有限公司 | A kind of wear-resisting roll-type hot rolling blade of high red hardness |
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| Publication number | Publication date |
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| CN100462469C (en) | 2009-02-18 |
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Effective date of registration: 20160628 Address after: 243131 Anhui city of Ma'anshan province Bowang Industrial Park District Bowang town Patentee after: Ma'anshan Shen Shen heavy industry machinery Limited by Share Ltd Address before: 243100 Anhui city of Ma'anshan province Bowang town Patentee before: Jinhai Metallurgical Machinery Co., Ltd., Ma'anshan |
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Effective date of registration: 20190121 Address after: 243131 Bowang Town East Industrial Park, Bowang District, Ma'anshan City, Anhui Province Patentee after: Jinhai Metallurgical Machinery Co., Ltd., Ma'anshan Address before: 243131 Bowang Town East Industrial Park, Bowang District, Ma'anshan City, Anhui Province Patentee before: Ma'anshan Shen Shen heavy industry machinery Limited by Share Ltd |
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Effective date of registration: 20200521 Address after: 243131 Anhui city of Ma'anshan province Bowang Industrial Park District Bowang town Patentee after: SHINITE MACHINERY Co.,Ltd. Address before: 243131 Bowang Town East Industrial Park, Bowang District, Ma'anshan City, Anhui Province Patentee before: MA'ANSHAN CITY JINHAI METALLURGY MACHINERY MAKINGCO., Ltd. |