CN104308152A - Wear-resisting high toughness shell core structure titanium-based bar material and preparation method thereof - Google Patents
Wear-resisting high toughness shell core structure titanium-based bar material and preparation method thereof Download PDFInfo
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Abstract
The invention claims a wear-resisting high toughness shell core structure titanium-based bar material and preparation method thereof and relates to the titanium-based bar material and preparation method thereof. The bad wear-resisting processing effect of the titanium or titanium alloy bar material can be solved. The wear-resisting high toughness shell core structure titanium-based bar material is composed of the outer wear-resisting shell layer and the inner high toughness core; the shell layer comprises the strengthening titanium-based composite material; the core is the titanium or titanium alloy. The preparation method comprises the steps as follows: 1, preparing the thin wall inner barrel; 2, locating the thin wall inner barrel into the mould; 3, pouring the powder, punching, taking the thin wall inner barrel out; 4, pumping into the vacuum state and hot pressed sintering. The wear-resisting high toughness shell core structure titanium-based bar material can keep high toughness of the titanium alloy and have the high wear-resisting performance of the titanium-based composite material.
Description
Technical field
The present invention relates to a kind of titanium base bar and preparation method thereof.
Background technology
Titanium alloy has lightweight, corrosion-resistant, specific strength advantages of higher, but its wearability is poor.In order to improve the wearability of titanium alloy and expand its range of application and improve service life, attempt multiple method.As in titanium alloy surface nitriding, ooze oxygen etc., but due to infiltration layer thinner, abrasion resistant effect is poor, and range of application is very limited.The another kind of method improving wearability prepares composite, by powder metallurgic method or fusion casting, in titanium alloy substrate, introduce ceramic phase, can significantly improve the wearability of titanium alloy substrate, but meanwhile the toughness of material declines to a great extent.Can also adopt the method for laser melting coating for flat sheet, prepare one deck titanium matrix composite to improve its wearability at plate surface, the method not only can improve its wearability but also can keep high tenacity, but is only limitted to process flat sheet; If adopt the method effects on surface have the titanium of radian or titanium alloy material particularly titanium or titanium alloy rod bar carry out laser melting coating, its abrasion-resistant titanium basic composite bed thickness is uneven, and effect is undesirable.
Summary of the invention
The present invention is the problem in order to solve titanium or titanium alloy rod bar surface abrasion resistance poor processing effect, and shell-and-core structure titanium base bar of a kind of wear-resisting high-ductility provided and preparation method thereof.
The shell-and-core structure titanium base bar of the wear-resisting high-ductility of the present invention is made up of the core of the wear-resisting shell in outside and inner high tenacity; Shell is the titanium matrix composite containing wild phase; Core is titanium or titanium alloy.
The shell-and-core structure titanium base bar of above-mentioned wear-resisting high-ductility is prepared according to the following steps:
One, thin-walled inner core is made according to the shape of bar core;
Two, thin-walled inner core is vertically put into hot pressed sintering mould central authorities;
Three, get shell matrix material powder and wild phase material powder to carry out ball milling and mix powder, then the space between mould and thin-walled inner core is poured into, pour the titanium or titanium alloy powder of making core into thin-walled inner core again, afterwards by shell and the compacting of core powder, extract thin-walled inner core out;
Four, vacuumize and carry out hot pressed sintering, namely obtain the shell-and-core structure titanium base bar of wear-resisting high-ductility.
The shell-and-core structure titanium base bar of the wear-resisting high-ductility that the present invention prepares both had maintained the feature of titanium alloy high tenacity, possessed again the advantage of titanium matrix composite high-wearing feature; Its outer hardness can reach HRC45-65.
Preparation method of the present invention is simple, easy to operate.Present invention employs special dress powder mode, Shell Materials and core material are separately loaded respectively, then together carries out vacuum heating-press sintering, thus obtain the shell-and-core structure material possessing different performance.The inventive method can prepare the shell of different-thickness as required, and the anti-wear performance by regulating the content of wild phase to control shell; And the cross section of core can have any shape, to meet different needs.
Accompanying drawing explanation
Fig. 1 is the dress powder schematic diagram of the shell-and-core structure titanium base bar of the wear-resisting high-ductility of preparation the present invention, and wherein, 1 is thin-walled inner core, and 2 is moulds, and 3 is push-down heads, and arrow 4 is core material loading positions, and arrow 5 is Shell Materials loading positions.
Fig. 2 is cross section photomacrograph and the interface enlarged drawing of the shell-and-core structure titanium base bar of wear-resisting high-ductility prepared by embodiment 1.
Detailed description of the invention
Technical solution of the present invention is not limited to following cited detailed description of the invention, also comprises any combination between each detailed description of the invention.
Detailed description of the invention one: the shell-and-core structure titanium base bar of the wear-resisting high-ductility of present embodiment is made up of the core of the wear-resisting shell in outside and inner high tenacity; Shell is the titanium matrix composite containing wild phase; Core is titanium or titanium alloy.
Detailed description of the invention two: the difference of present embodiment and detailed description of the invention one is: the thickness 1 ~ 10mm of shell.Other is identical with embodiment one.
Detailed description of the invention three: the difference of present embodiment and detailed description of the invention one or two is: the diameter of core is 5 ~ 400mm.Other is identical with embodiment one or two.
Detailed description of the invention four: the difference of one of present embodiment and detailed description of the invention one to three is: the wild phase raw material in shell is TiB
2, B
4c, LaB
6, B, C or SiC.Other is identical with one of embodiment one to three.
Detailed description of the invention five: the difference of one of present embodiment and detailed description of the invention one to four is: the matrix material in shell is TA, TB or TC series titanium alloy.Other is identical with one of embodiment one to four.
Detailed description of the invention six: the difference of one of present embodiment and detailed description of the invention one to five is: the content of the wild phase in shell is 3vol.% ~ 25vol.%.Other is identical with one of embodiment one to five.
Detailed description of the invention seven: the difference of one of present embodiment and detailed description of the invention one to six is: the content of the wild phase in shell is 8vol.% ~ 15vol.%.Other is identical with one of embodiment one to six.
Detailed description of the invention eight: the difference of one of present embodiment and detailed description of the invention one to seven is: the titanium alloy forming core is TA, TB or TC series titanium alloy.Other is identical with one of embodiment one to seven.
Detailed description of the invention nine: present embodiment prepares the shell-and-core structure titanium base bar of wear-resisting high-ductility according to the following steps:
One, thin-walled inner core is made according to the shape of bar core;
Two, thin-walled inner core is vertically put into hot pressed sintering mould central authorities;
Three, get shell matrix material powder and wild phase material powder to carry out ball milling and mix powder, then the space between mould and thin-walled inner core is poured into, pour the titanium or titanium alloy powder of making core into thin-walled inner core again, afterwards by shell and the compacting of core powder, extract thin-walled inner core out;
Four, vacuumize and carry out hot pressed sintering, namely obtain the shell-and-core structure titanium base bar of wear-resisting high-ductility.
In present embodiment, the wall thickness of thin-walled inner core is less than 1mm.
Present embodiment can prepare the shell-and-core structure titanium base bar of varying cross-section shape according to mould and thin-walled inner core.The shell-and-core structure titanium base bar dress powder of the wear-resisting high-ductility of present embodiment as shown in Figure 1.
Detailed description of the invention ten: the difference of present embodiment and detailed description of the invention nine is: in step 3, rotational speed of ball-mill is 120 ~ 200r/min, ratio of grinding media to material is 3 ︰ 1, and Ball-milling Time is 4 ~ 8h.Other step and parameter identical with embodiment nine.
Detailed description of the invention 11: the difference of present embodiment and detailed description of the invention nine or ten is: in step 4, hot pressed sintering temperature is 1000 ~ 1500 DEG C, hot pressed sintering pressure is 10 ~ 100MPa, and the hot pressed sintering time is 0.5 ~ 5h.Other step and parameter identical with embodiment nine or ten.
Detailed description of the invention 12: the difference of one of present embodiment and detailed description of the invention nine to ten one is: in step 3, wild phase raw material is TiB
2, B
4c, LaB
6, B, C or SiC; Matrix material is TA, TB or TC series titanium alloy; Core titanium alloy is TA, TB or TC series titanium alloy.Other step and parameter identical with one of embodiment nine to ten one.
Detailed description of the invention 13: the difference of one of present embodiment and detailed description of the invention nine to ten two is: in rapid three shells, the volume ratio of wild phase and matrix material is 3 ︰ 97 ~ 25 ︰ 75.Other step and parameter identical with one of embodiment nine to ten two.
Embodiment 1
Prepare the shell-and-core structure titanium base bar of wear-resisting high-ductility according to the following steps:
One, Circular Thin inner core is made;
Two, thin-walled inner core is vertically put into hot pressed sintering mould central authorities;
Three, shell matrix material TC4 Titanium Powder and wild phase raw material TiB is got
2ceramic powder carries out ball milling and mixes powder, and rotational speed of ball-mill is 200r/min, and ratio of grinding media to material is 3 ︰ 1, and Ball-milling Time is 5h; Then pour the space between mould and thin-walled inner core into, then pour the TC4 titanium alloy powder making core into thin-walled inner core, afterwards by shell and the compacting of core powder, extract thin-walled inner core out;
Four, vacuumize and carry out hot pressed sintering, hot pressed sintering temperature is 1200 DEG C, and hot pressed sintering pressure is 25MPa, and the hot pressed sintering time is 1h, namely obtains the shell-and-core structure titanium base bar of wear-resisting high-ductility.
Wherein, wild phase raw material TiB
2the quality of ceramic powder accounts for 5% of Shell Materials gross mass.
In the shell of the shell-and-core structure titanium base bar of the wear-resisting high-ductility that the present embodiment is prepared, wild phase TiBw accounts for 8.5vol.% in shell.
The shell-and-core structure titanium base bar of wear-resisting high-ductility prepared by the present embodiment, its shell thickness is 10mm, and core diameters is 20mm.
Carry out hardness test to the shell-and-core structure titanium base bar different parts of wear-resisting high-ductility prepared by the present embodiment to show, shell (8.5vol.%TiBw/TC4) hardness reaches HRC50, and core (TC4 titanium alloy) hardness is HRC32.Room temperature friction-wear test test result shows, and the coefficient of friction of TC4 titanium alloy is 0.5, and the coefficient of friction of the shell-and-core structure titanium base bar of wear-resisting high-ductility prepared by the present embodiment is only 0.3.
Room temperature impact toughness test result shows, and the impact flexibility of TC4 titanium alloy is 500kJ/m
2, the impact flexibility of 8.5vol.%TiBw/TC4 composite is only 280kJ/m
2, the impact flexibility of the shell-and-core structure titanium base bar of wear-resisting high-ductility prepared by the present embodiment reaches 430kJ/m
2.
The shell-and-core structure titanium base bar of wear-resisting high-ductility prepared by the invention of experiment proved not only substantially increases the anti-wear performance of titanium material, and ensure that and its higher toughness considerably increase its service life.
The cross section photomacrograph of the shell-and-core structure titanium base bar of wear-resisting high-ductility prepared by the present embodiment and interface enlarged drawing are as shown in Figure 2.As shown in Figure 2, the shell-and-core structure titanium base bar density of wear-resisting high-ductility prepared by the present embodiment is high, and without hole, and interface cohesion is good, ensure that excellent combination property.
Embodiment 2
Prepare the shell-and-core structure titanium base bar of wear-resisting high-ductility according to the following steps:
One, gear-like thin-walled inner core is made;
Two, thin-walled inner core is vertically put into hot pressed sintering mould central authorities;
Three, get shell matrix material TC4 Titanium Powder and wild phase raw material B powder to carry out ball milling and mix powder, rotational speed of ball-mill is 200r/min, and ratio of grinding media to material is 3 ︰ 1, and Ball-milling Time is 7h; Then pour the space between mould and thin-walled inner core into, then pour the TC4 titanium alloy powder making core into thin-walled inner core, afterwards by shell and the compacting of core powder, extract thin-walled inner core out;
Four, vacuumize and carry out hot pressed sintering, hot pressed sintering temperature is 1300 DEG C, and hot pressed sintering pressure is 25MPa, and the hot pressed sintering time is 1h, namely obtains the shell-and-core structure titanium base bar of wear-resisting high-ductility.
Wherein, the quality of wild phase raw material B powder accounts for 2.29% of Shell Materials gross mass.
In the shell of the shell-and-core structure titanium base bar of the wear-resisting high-ductility that the present embodiment is prepared, wild phase TiBw accounts for 12vol.% in shell.
The shell-and-core structure titanium base bar of wear-resisting high-ductility prepared by the present embodiment, its shell thickness is 6mm, and core diameters is 20mm.
Carry out hardness test to the shell-and-core structure titanium base bar different parts of wear-resisting high-ductility prepared by the present embodiment to show, shell (12vol.%TiBw/TC4) hardness reaches HRC54, and core (TC4 titanium alloy) hardness is HRC32.Room temperature friction-wear test test result shows, and the coefficient of friction of TC4 titanium alloy is 0.5, and the coefficient of friction of the shell-and-core structure titanium base bar of wear-resisting high-ductility prepared by the present embodiment is only 0.26.
Room temperature impact toughness test result shows, and the impact flexibility of TC4 titanium alloy is 500kJ/m
2, the impact flexibility of 12vol.%TiBw/TC4 composite is only 230kJ/m
2, the impact flexibility of the shell-and-core structure titanium base bar of wear-resisting high-ductility prepared by the present embodiment reaches 460kJ/m
2.
The shell-and-core structure titanium base bar of wear-resisting high-ductility prepared by the invention of experiment proved not only substantially increases the anti-wear performance of titanium material, and ensure that and its higher toughness considerably increase its service life.
Embodiment 3
Prepare the shell-and-core structure titanium base bar of wear-resisting high-ductility according to the following steps:
One, Circular Thin inner core is made;
Two, thin-walled inner core is vertically put into hot pressed sintering mould central authorities;
Three, shell matrix material TA15 Titanium Powder and wild phase raw material TiB is got
2ceramic powder carries out ball milling and mixes powder, and rotational speed of ball-mill is 150r/min, and ratio of grinding media to material is 3 ︰ 1, and Ball-milling Time is 5h; Then pour the space between mould and thin-walled inner core into, then pour the TC4 titanium alloy powder making core into thin-walled inner core, afterwards by shell and the compacting of core powder, extract thin-walled inner core out;
Four, vacuumize and carry out hot pressed sintering, hot pressed sintering temperature is 1300 DEG C, and hot pressed sintering pressure is 30MPa, and the hot pressed sintering time is 3h, namely obtains the shell-and-core structure titanium base bar of wear-resisting high-ductility.
Wherein, wild phase raw material TiB
2the quality of ceramic powder accounts for 7.06% of Shell Materials gross mass.
In the shell of the shell-and-core structure titanium base bar of the wear-resisting high-ductility that the present embodiment is prepared, wild phase TiBw accounts for 12vol.% in shell.
The shell-and-core structure titanium base bar of wear-resisting high-ductility prepared by the present embodiment, its shell thickness is 5mm, and core diameters is 30mm.
Carry out hardness test to the shell-and-core structure titanium base bar different parts of wear-resisting high-ductility prepared by the present embodiment to show, shell (12vol.%TiBw/TA15) hardness reaches HRC56, and core (TC4 titanium alloy) hardness is HRC32.Room temperature friction-wear test test result shows, and the coefficient of friction of TC4 titanium alloy is 0.5, and the coefficient of friction of the shell-and-core structure titanium base bar of wear-resisting high-ductility prepared by the present embodiment is only 0.25.
Room temperature impact toughness test result shows, and the impact flexibility of TC4 titanium alloy is 500kJ/m
2, the impact flexibility of 12vol.%TiBw/TA15 composite is only 210kJ/m
2, the impact flexibility of the shell-and-core structure titanium base bar of wear-resisting high-ductility prepared by the present embodiment reaches 440kJ/m
2.
The shell-and-core structure titanium base bar of wear-resisting high-ductility prepared by the invention of experiment proved not only substantially increases the anti-wear performance of titanium material, and ensure that and its higher toughness considerably increase its service life.
Embodiment 4
Prepare the shell-and-core structure titanium base bar of wear-resisting high-ductility according to the following steps:
One, Circular Thin inner core is made;
Two, thin-walled inner core is vertically put into hot pressed sintering mould central authorities;
Three, shell matrix material TC4 Titanium Powder and wild phase raw material B is got
4c ceramic powder carries out ball milling and mixes powder, and rotational speed of ball-mill is 180r/min, and ratio of grinding media to material is 3 ︰ 1, and Ball-milling Time is 4h; Then pour the space between mould and thin-walled inner core into, then pour the TC4 titanium alloy powder making core into thin-walled inner core, afterwards by shell and the compacting of core powder, extract thin-walled inner core out;
Four, vacuumize and carry out hot pressed sintering, hot pressed sintering temperature is 1200 DEG C, and hot pressed sintering pressure is 30MPa, and the hot pressed sintering time is 2h, namely obtains the shell-and-core structure titanium base bar of wear-resisting high-ductility.
Wherein, wild phase raw material B
4the quality of C ceramic powder accounts for 2.86% of Shell Materials gross mass.
In the shell of the shell-and-core structure titanium base bar of the wear-resisting high-ductility that the present embodiment is prepared, wild phase TiBw+TiCp accounts for 15vol.% in shell.
The shell-and-core structure titanium base bar of wear-resisting high-ductility prepared by the present embodiment, its shell thickness is 3mm, and core diameters is 15mm.
Carry out hardness test to the shell-and-core structure titanium base bar different parts of wear-resisting high-ductility prepared by the present embodiment to show, shell 15vol.% (TiBw+TiCp)/TC4 hardness reaches HRC57, and core (TC4 titanium alloy) hardness is HRC32.Room temperature friction-wear test test result shows, and the coefficient of friction of TC4 titanium alloy is 0.5, and the coefficient of friction of the shell-and-core structure titanium base bar of wear-resisting high-ductility prepared by the present embodiment is only 0.24.
Room temperature impact toughness test result shows, and the impact flexibility of TC4 titanium alloy is 500kJ/m
2, the impact flexibility of 15vol.% (TiBw+TiCp)/TC4 composite is only 220kJ/m
2, the impact flexibility of the shell-and-core structure titanium base bar of wear-resisting high-ductility prepared by the present embodiment reaches 420kJ/m
2.
The shell-and-core structure titanium base bar of wear-resisting high-ductility prepared by the invention of experiment proved not only substantially increases the anti-wear performance of titanium material, and ensure that and its higher toughness considerably increase its service life.
Embodiment 5
Prepare the shell-and-core structure titanium base bar of wear-resisting high-ductility according to the following steps:
One, Circular Thin inner core is made;
Two, thin-walled inner core is vertically put into hot pressed sintering mould central authorities;
Three, shell matrix material TB8 Titanium Powder and wild phase raw material LaB is got
6ceramic powder carries out ball milling and mixes powder, and rotational speed of ball-mill is 120r/min, and ratio of grinding media to material is 3 ︰ 1, and Ball-milling Time is 6h; Then pour the space between mould and thin-walled inner core into, then pour the TC4 titanium alloy powder making core into thin-walled inner core, afterwards by shell and the compacting of core powder, extract thin-walled inner core out;
Four, vacuumize and carry out hot pressed sintering, hot pressed sintering temperature is 1400 DEG C, and hot pressed sintering pressure is 15MPa, and the hot pressed sintering time is 2h, namely obtains the shell-and-core structure titanium base bar of wear-resisting high-ductility.
Wherein, wild phase raw material LaB
6the quality of ceramic powder accounts for 4.4% of Shell Materials gross mass.
Wild phase TiBw+La in the shell of the shell-and-core structure titanium base bar of the wear-resisting high-ductility that the present embodiment is prepared
2o
310vol.% is accounted in shell.
The shell-and-core structure titanium base bar of wear-resisting high-ductility prepared by the present embodiment, its shell thickness is 5mm, and core diameters is 80mm.
Carry out hardness test to the shell-and-core structure titanium base bar different parts of wear-resisting high-ductility prepared by the present embodiment to show, shell 10vol.% (TiBw+La
2o
3)/TB8 hardness reaches HRC56, and core (TC4 titanium alloy) hardness is HRC32.Room temperature friction-wear test test result shows, and the coefficient of friction of TC4 titanium alloy is 0.5, and the coefficient of friction of the shell-and-core structure titanium base bar of wear-resisting high-ductility prepared by the present embodiment is only 0.26.
Room temperature impact toughness test result shows, and the impact flexibility of TC4 titanium alloy is 500kJ/m
2, 10vol.% (TiBw+La
2o
3the impact flexibility of)/TB8 composite is only 220kJ/m
2, the impact flexibility of the shell-and-core structure titanium base bar of wear-resisting high-ductility prepared by the present embodiment reaches 460kJ/m
2.
The shell-and-core structure titanium base bar of wear-resisting high-ductility prepared by the invention of experiment proved not only substantially increases the anti-wear performance of titanium material, and ensure that and its higher toughness considerably increase its service life.
Embodiment 6
Prepare the shell-and-core structure titanium base bar of wear-resisting high-ductility according to the following steps:
One, Circular Thin inner core is made;
Two, thin-walled inner core is vertically put into hot pressed sintering mould central authorities;
Three, shell matrix material TC4 Titanium Powder and wild phase raw material TiB is got
2ceramic powder carries out ball milling and mixes powder, and rotational speed of ball-mill is 200r/min, and ratio of grinding media to material is 3 ︰ 1, and Ball-milling Time is 5h; Then pour the space between mould and thin-walled inner core into, then pour the TA5 titanium alloy powder making core into thin-walled inner core, afterwards by shell and the compacting of core powder, extract thin-walled inner core out;
Four, vacuumize and carry out hot pressed sintering, hot pressed sintering temperature is 1300 DEG C, and hot pressed sintering pressure is 30MPa, and the hot pressed sintering time is 2h, namely obtains the shell-and-core structure titanium base bar of wear-resisting high-ductility.
Wherein, wild phase raw material TiB
2the quality of ceramic powder accounts for 11.76% of Shell Materials gross mass.
In the shell of the shell-and-core structure titanium base bar of the wear-resisting high-ductility that the present embodiment is prepared, wild phase TiBw accounts for 20vol.% in shell.
The shell-and-core structure titanium base bar of wear-resisting high-ductility prepared by the present embodiment, its shell thickness is 3mm, and core diameters is 40mm.
Carry out hardness test to the shell-and-core structure titanium base bar different parts of wear-resisting high-ductility prepared by the present embodiment to show, shell (20vol.%TiBw/TC4) hardness reaches HRC60, and core (TA5 titanium alloy) hardness is HRC27.Room temperature friction-wear test test result shows, and the coefficient of friction of TA5 titanium alloy is 0.65, and the coefficient of friction of the shell-and-core structure titanium base bar of wear-resisting high-ductility prepared by the present embodiment is only 0.2.
Room temperature impact toughness test result shows, and the impact flexibility of TA5 titanium alloy is 480kJ/m
2, the impact flexibility of 20vol.%TiBw/TC4 composite is only 160kJ/m
2, the impact flexibility of the shell-and-core structure titanium base bar of wear-resisting high-ductility prepared by the present embodiment reaches 445kJ/m
2.
The shell-and-core structure titanium base bar of wear-resisting high-ductility prepared by the invention of experiment proved not only substantially increases the anti-wear performance of titanium material, and ensure that and its higher toughness considerably increase its service life.
Claims (10)
1. a shell-and-core structure titanium base bar for wear-resisting high-ductility, is characterized in that the shell-and-core structure titanium base bar of wear-resisting high-ductility is made up of the core of the wear-resisting shell in outside and inner high tenacity; Shell is the titanium matrix composite containing wild phase; Core is titanium or titanium alloy.
2. the shell-and-core structure titanium base bar of wear-resisting high-ductility according to claim 1, is characterized in that the wild phase raw material in shell is TiB
2, B
4c, LaB
6, B, C or SiC.
3. the shell-and-core structure titanium base bar of wear-resisting high-ductility according to claim 1, is characterized in that the matrix material in shell is TA, TB or TC series titanium alloy.
4. the shell-and-core structure titanium base bar of wear-resisting high-ductility according to claim 1, is characterized in that the content of the wild phase in shell is 3vol.% ~ 25vol.%.
5. the shell-and-core structure titanium base bar of wear-resisting high-ductility according to claim 1, the titanium alloy that it is characterized in that forming core is TA, TB or TC series titanium alloy.
6. prepare the method for the shell-and-core structure titanium base bar of the wear-resisting high-ductility of claim 1, it is characterized in that the shell-and-core structure titanium base bar preparing wear-resisting high-ductility according to the following steps:
One, thin-walled inner core is made according to the shape of bar core;
Two, thin-walled inner core is vertically put into hot pressed sintering mould central authorities;
Three, get shell matrix material powder and wild phase material powder to carry out ball milling and mix powder, then the space between mould and thin-walled inner core is poured into, pour the titanium or titanium alloy powder of making core into thin-walled inner core again, afterwards by shell and the compacting of core powder, extract thin-walled inner core out;
Four, vacuumize and carry out hot pressed sintering, namely obtain the shell-and-core structure titanium base bar of wear-resisting high-ductility.
7. the preparation method of the shell-and-core structure titanium base bar of wear-resisting high-ductility according to claim 6, it is characterized in that in step 3, rotational speed of ball-mill is 120 ~ 200r/min, ratio of grinding media to material is 3 ︰ 1, and Ball-milling Time is 4 ~ 8h.
8. the preparation method of the shell-and-core structure titanium base bar of wear-resisting high-ductility according to claim 6, it is characterized in that in step 4, hot pressed sintering temperature is 1000 ~ 1500 DEG C, hot pressed sintering pressure is 10 ~ 100MPa, and the hot pressed sintering time is 0.5 ~ 5h.
9. the preparation method of the shell-and-core structure titanium base bar of wear-resisting high-ductility according to claim 6, is characterized in that in step 3, wild phase raw material is TiB
2, B
4c, LaB
6, B, C or SiC; Matrix material is TA, TB or TC series titanium alloy; Core titanium alloy is TA, TB or TC series titanium alloy.
10. the preparation method of the shell-and-core structure titanium base bar of wear-resisting high-ductility according to claim 6, is characterized in that the volume ratio of wild phase and matrix material in step 3 shell is 3 ︰ 97 ~ 25 ︰ 75.
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| CN108000004A (en) * | 2017-12-11 | 2018-05-08 | 哈尔滨工业大学 | A kind of preparation method of titanium flux-cored wire for 3D printing titanium matrix composite |
| CN109338159A (en) * | 2018-12-28 | 2019-02-15 | 哈尔滨工业大学（威海） | A kind of high-ductility titanium based composites preparation method |
| CN110344054A (en) * | 2019-08-08 | 2019-10-18 | 上海交通大学 | It is a kind of to utilize LaB6The method that titanium-based laser cladding coating is modified |
| CN114131015A (en) * | 2021-12-13 | 2022-03-04 | 上海交通大学 | Confined powder filling method for preparing configuration composite material |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108000004A (en) * | 2017-12-11 | 2018-05-08 | 哈尔滨工业大学 | A kind of preparation method of titanium flux-cored wire for 3D printing titanium matrix composite |
| CN108000004B (en) * | 2017-12-11 | 2019-11-05 | 哈尔滨工业大学 | A kind of preparation method of the titanium flux-cored wire for 3D printing titanium composite material |
| CN109338159A (en) * | 2018-12-28 | 2019-02-15 | 哈尔滨工业大学（威海） | A kind of high-ductility titanium based composites preparation method |
| CN110344054A (en) * | 2019-08-08 | 2019-10-18 | 上海交通大学 | It is a kind of to utilize LaB6The method that titanium-based laser cladding coating is modified |
| CN114131015A (en) * | 2021-12-13 | 2022-03-04 | 上海交通大学 | Confined powder filling method for preparing configuration composite material |
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