CN103056340B - Method for casting surface layer by using TiAlC-base ceramic powder as metal and titanium alloy - Google Patents

Method for casting surface layer by using TiAlC-base ceramic powder as metal and titanium alloy Download PDF

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Publication number
CN103056340B
CN103056340B CN201310003387.1A CN201310003387A CN103056340B CN 103056340 B CN103056340 B CN 103056340B CN 201310003387 A CN201310003387 A CN 201310003387A CN 103056340 B CN103056340 B CN 103056340B
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casting
tialc
powder
alloy
titanium alloy
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CN103056340A (en
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曹大力
董艳芳
李凯辉
刘延福
邵萍萍
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Shenyang University of Chemical Technology
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Shenyang University of Chemical Technology
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Abstract

The invention relates to an alloy surface casting method, in particular to a method for casting a surface layer by using TiAlC-base ceramic powder as metal and titanium alloy. TiAlC-base metal ceramic power or ceramic block is made from Ti2AlC, Ti3AlC2 and TiC1-x. The method includes: weighing materials according to the proportion, and performing ball milling, drying, tabletting and sintering to obtain Ti3AlC2 block material; cutting and grinding the Ti3AlC2 block material into grains, adhering the grains into a compound-base shell by zirconium acetate as binder; performing shell test, melting Ti alloy in a calcia crucible in a vacuum induction heating furnace, and vacuuming the furnace and filling argon during melting. The yttrium oxide can be replaced with the TiAlC-base ceramic powder used in method, so that production cost is lowered. The problems that alloy surface molding material for precision investment casting is expensive and production process is complex are solved.

Description

By the method for TiAlC based ceramic powder material as metal and Ti alloy casting surface layer
Technical field
The present invention relates to a kind of casting alloy surface layer method, particularly relate to the method for a kind of TiAlC based ceramic powder material as metal and Ti alloy casting surface layer.
Background technology
Titanium or titanium alloy, owing to having excellent characteristic, is widely used in every field.And the production cost of titanium alloy component remains high.Alloy precision-investment casting is one of shaping important method of titanium alloy, is the successful techniques route that people explore the production cost reducing titanium alloy component.But because titanium has very high chemism, molten titanium almost can react with all refractory materials.Conventional refractory material, all can with molten titanium generation vigorous reaction, and the precision-investment casting surface layer Modeling Material of titanium alloy cannot be used for.The yittrium oxide that chemical stability is higher, zirconia or tungsten powder etc. are Modeling Materials conventional in current titanium alloy precise-investment casting, but these materials also exist the problem of fetch long price and complex manufacturing equally.
And the double carbide pottery TiAlC based ceramic metal powder of layer structure or ceramic block have unique design feature, not only take into account the satisfactory electrical conductivity of the strong corrosion resistance of pottery, anti-oxidant, high-temperature stability and metal, therefore can the yittrium oxide of expensive, the complex process of fictitious hosts, zirconia or tungsten powder etc., and molten titanium liquid does not react, it is made to be more suitable for as Ti alloy casting surface material.
Summary of the invention
The object of the present invention is to provide a kind of TiAlC based ceramic powder material as the method for metal and Ti alloy casting surface layer.TiAlC based ceramic metal powder or ceramic sand grains are as Ti alloy casting surface material, can ensure at high temperature not react with titanium alloy, can yittrium oxide be substituted, reduce production cost, solve the precision-investment casting surface layer Modeling Material costliness of titanium alloy and the problem of complex manufacturing.
The object of the invention is to be achieved through the following technical solutions:
By the method for TiAlC based ceramic powder material as metal and Ti alloy casting surface layer, method described in it comprises the surface material of TiAlC based ceramic metal powder as Titanium and titanium alloy precision casting, or as the investment precoat of metal titanium and its alloys sand casting ;tiAlC based ceramic metal powder or ceramic block are Ti 2alC, Ti 3alC 2, TiC 1-x; Described method comprises following preparation process: by each for raw material component by proportioning weighing, and then carry out ball milling, oven dry, compressing tablet, sintering, obtain Ti 3alC 2block materials; Carried out cutting and be polished into sand grains, use acetic acid zirconium to be binding agent, sticked into required composite base shell, with to be used; Carry out shell test, in vacuum induction heating furnace, Ti alloy is placed in lime crucible and melts, during melting, applying argon gas after the inherent vacuum of stove, pours into titanium alloy in casting mold, takes out obtained ganoid titanium alloy casting when casting temperature is reduced to room temperature.
By the method for TiAlC based ceramic powder material as metal and Ti alloy casting surface layer, method described in it comprises the surface material of TiAlC based ceramic metal powder as Titanium and titanium alloy precision casting, or as the investment precoat of metal titanium and its alloys sand casting ;tiAlC based ceramic metal powder or ceramic block are Ti 2alC, Ti 3alC 2, TiC 1-x; By each for raw material component by proportioning weighing, and then carry out ball milling, oven dry, compressing tablet, sintering, obtain TiC 1-xblock material; Block after sintering is smashed, grinds to form powder, obtain TiC 1-xcermet powder; TiC 1-xcermet powder, JFC type surfactant and octanol are put into yttrium colloidal sol and are mixed with coating; By TiC 1-xcoating is coated with equably and hangs over wax pattern surface, repeats stucco and becomes cermet powder; Backing layer is coated with after the abundant drying of shell surface layer; Backing layer coating is made up of mullite powder and Ludox, and after the abundant drying of shell, to shell dewaxing, the shell after dewaxing with stove cooling, with to be used, obtains the titanium alloy casting of any surface finish in roaster after titanium alloy being poured into shell mould.
Described by the method for TiAlC based ceramic powder material as metal and Ti alloy casting surface layer, prepare described in it in TiAlC based ceramic metal powder process and be mixed with a small amount of Ti 3al, TiC, graphite and TiAl 3dephasign.
Advantage of the present invention and effect are:
The present invention can solve a difficult problem for the precision-investment casting surface layer Modeling Material costliness of titanium alloy and the problem of complex manufacturing, the present invention can use the powder body material of TiAlC based ceramic metal and block materials as surface material, price is lower, technique preparation is simple, and do not react with molten titanium liquid under high temperature, obtained titanium alloy surface is bright and clean.And the materials such as yittrium oxide, zirconia or tungsten powder can be substituted, reduce production cost, bring considerable economic benefit and social benefit.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in detail.
Use TiAlC based ceramic powder material or ceramic block as the surface material of metal and Ti alloy casting, using TiAlC based ceramic metal powder or ceramic sand grains as titanium investment casting plane layer material.TiAlC based ceramic metal powder or ceramic block can be divided into Ti 2alC, Ti 3alC 2, TiC 1-xand a small amount of Ti is mixed with in preparation TiAlC based ceramic metal powder process 3al, TiC, graphite and TiAl 3deng dephasign.TiAlC based ceramic metal powder can be used as the surface material of Titanium and titanium alloy precision casting, also can be used as the investment precoat of metal titanium and its alloys sand casting .
Embodiment 1
Preparation Ti 3alC 2cermet block, the group powder proportionally carrying out proportioning adds: Ti powder, Al powder, C powder, corundum ball and absolute ethyl alcohol are weighing according to following weight fraction ratio:
48 parts, Ti powder;
9 parts, Al powder;
8 parts, C powder;
325 parts, corundum ball (5:1);
Absolute ethyl alcohol is appropriate.
Preparation Ti 3alC 2ceramic-metallic method is as follows:
(A) each for raw material component is pressed proportioning weighing, and then carry out ball milling, oven dry, compressing tablet, sintering, obtain Ti 3alC 2block materials;
(B) Ti will be obtained 3alC 2cermet block, is carried out cutting and is polished into 325,100 order sand grains, uses acetic acid zirconium to be binding agent, is sticked into required composite base shell, with to be used;
(C) carry out shell test, in vacuum induction heating furnace, Ti alloy is placed in lime crucible and melts, during melting, after inherent vacuum 7 below the Pa of stove, applying argon gas;
(D) titanium alloy is poured in casting mold, take out when casting temperature is reduced to room temperature, ganoid titanium alloy casting can be obtained.
Embodiment 2
Preparation Ti 2alC-TiC-Ti 3al cermet block, the group powder proportionally carrying out proportioning adds: Ti powder, Al powder, C powder, corundum ball and absolute ethyl alcohol are weighing according to following weight fraction ratio:
32 parts, Ti powder;
9.9 parts, Al powder;
3.6 parts, C powder;
227.5 parts, corundum ball (5:1);
Absolute ethyl alcohol is appropriate.
Prepare above-mentioned Ti 2alC-TiC-Ti 3the ceramic-metallic method of Al is as follows:
(A) each for raw material component is pressed proportioning weighing, and then carry out ball milling, oven dry, compressing tablet, sintering, obtain Ti 2alC-TiC-Ti 3al block materials;
(B) Ti will be obtained 2alC-TiC-Ti 3al cermet block, is carried out cutting and is polished into 100 order sand grains, uses high-temperature agglomerant, is sticked into required composite base shell, with to be used;
(C) carry out shell test, in vacuum induction heating furnace, metal Ti is placed in lime crucible and melts, during melting, after inherent vacuum 7 below the Pa of stove, applying argon gas;
(D) titanium alloy is poured in casting mold, take out when casting temperature is reduced to room temperature, ganoid titanium alloy casting can be obtained.
Embodiment 3
Preparation TiC 1-xcermet block, the group powder proportionally carrying out proportioning adds: Ti powder, Al powder, C powder, corundum ball and absolute ethyl alcohol are weighing according to following weight fraction ratio:
48 parts, Ti powder;
9.9 parts, Al powder;
7.2 parts, C powder;
325.5 parts, corundum ball (5:1);
Prepare above-mentioned TiC 1-xceramic-metallic method is as follows:
(A) each for raw material component is pressed proportioning weighing, and then carry out ball milling, oven dry, compressing tablet, sintering, obtain TiC 1-xblock materials;
(B) TiC will be obtained 1-xcermet block, is carried out cutting and is polished into 100 order sand grains, uses high-temperature agglomerant, is sticked into required composite base shell, with to be used;
(C) carry out shell test, in vacuum induction heating furnace, Ti alloy is placed in lime crucible and melts, during melting, after inherent vacuum 7 below the Pa of stove, applying argon gas;
(D) titanium alloy is poured in casting mold, take out when casting temperature is reduced to room temperature, ganoid titanium alloy casting can be obtained.
Embodiment 4
The group powder proportionally carrying out proportioning adds: Ti powder, Al powder, C powder, abrading-ball are weighing according to following weight fraction ratio:
48 parts, Ti powder;
9 parts, Al powder;
8 parts, C powder;
325 parts, corundum ball (5:1).
Prepare above-mentioned Ti 3alC 2-TiC-Ti 3the method of Al cermet powder is as follows:
(A) each for raw material component is pressed proportioning weighing, and then carry out ball milling, oven dry, compressing tablet, sintering, obtain Ti 3alC 2block materials;
(B) block after sintering is smashed, grind to form powder, obtain Ti 3alC 2cermet powder;
(C) by Ti 3alC 2a small amount of JFC type surfactant and octanol are put into acetic acid zirconium colloidal sol and are mixed with coating.(w( ti3AlC2-TiC-Ti3Al) %=100, powder liquor ratio is 0.19)
(D) by Ti 3alC 2-TiC-Ti 3al coating is coated with equably and hangs over wax pattern surface, repeats twice;
(E) stucco particle mean size is 130 μm of Ti 3alC 2cermet powder.
(F) after the abundant drying of shell surface layer, backing layer is coated with.Backing layer coating is then made up of mullite powder and Ludox;
(G) after the abundant drying of shell, to shell dewaxing, the shell after dewaxing cools with stove, with to be used in roaster;
(H), after titanium alloy being poured into shell mould, the titanium alloy casting of any surface finish can be obtained.
Embodiment 5
The group powder carrying out proportioning according to former ratio adds: Ti powder, Al powder, C powder are weighing according to following weight fraction ratio:
32 parts, Ti powder;
9.9 parts, Al powder;
3.6 parts, C powder.
Prepare above-mentioned Ti 2the ceramic-metallic method of AlC is as follows:
(A) each for raw material component is pressed proportioning weighing, and then carry out ball milling, oven dry, compressing tablet, sintering, obtain Ti 2alCl block materials;
(B) block after sintering is smashed, grind to form powder, obtain Ti 2alC cermet powder;
(C) Ti 2alC cermet powder, a small amount of JFC type surfactant and octanol are put into yttrium colloidal sol and are mixed with coating;
(D) by Ti 2alC coating is coated with equably and hangs over wax pattern surface, repeats twice;
(E) stucco particle mean size is 130 μm of Ti 2alC cermet powder;
((F) is coated with backing layer after the abundant drying of shell surface layer.Backing layer coating is then made up of mullite powder and Ludox;
(G) after the abundant drying of shell, to shell dewaxing, the shell after dewaxing cools with stove, with to be used in roaster;
(H), after titanium alloy being poured into shell mould, the titanium alloy casting of any surface finish can be obtained.
Embodiment 6
The group powder carrying out proportioning according to former ratio adds: Ti powder, Al powder, C powder weigh according to following weight fraction ratio:
48 parts, Ti powder;
9.9 parts, Al powder;
7.2 parts, C powder.
Prepare above-mentioned TiC 1-xthe method of cermet powder is as follows:
(A) each for raw material component is pressed proportioning weighing, and then carry out ball milling, oven dry, compressing tablet, sintering, obtain TiC 1-xblock material;
(B) block after sintering is smashed, grind to form powder, obtain TiC 1-xcermet powder;
(C) TiC 1-xcermet powder, a small amount of JFC type surfactant and octanol are put into yttrium colloidal sol and are mixed with coating;
(D) by TiC 1-xcoating is coated with equably and hangs over wax pattern surface, repeats twice;
(E) stucco particle mean size is 130 μm of TiC 1-xcermet powder;
(F) after the abundant drying of shell surface layer, backing layer is coated with.Backing layer coating is then made up of mullite powder and Ludox;
(G) after the abundant drying of shell, to shell dewaxing, the shell after dewaxing cools with stove, with to be used in roaster;
(H), after titanium alloy being poured into shell mould, the titanium alloy casting of any surface finish can be obtained.

Claims (2)

1. with TiAlC based ceramic metal powder as the method for Ti alloy casting surface layer, it is characterized in that, described method comprises the surface material of TiAlC based ceramic metal powder as titanium alloy precision casting, or as the investment precoat of titanium alloy sand casting ;tiAlC based ceramic metal powder is Ti 3alC 2; Described method comprises following preparation process: by each for raw material component by proportioning weighing, and then carry out ball milling, oven dry, compressing tablet, sintering, obtain Ti 3alC 2block materials; Carried out cutting and be polished into sand grains, use acetic acid zirconium to be binding agent, sticked into required composite base shell, with to be used; Carry out shell test, in vacuum induction heating furnace, Ti alloy is placed in lime crucible and melts, during melting, applying argon gas after evacuation in stove, pours into titanium alloy in casting mold, takes out obtained ganoid titanium alloy casting when casting temperature is reduced to room temperature.
2. TiAlC based ceramic metal powder according to claim 1 is as the method for Ti alloy casting surface layer, it is characterized in that, is mixed with a small amount of Ti in described TiAlC based ceramic metal powder 3al, TiC, graphite and TiAl 3dephasign.
CN201310003387.1A 2013-01-06 2013-01-06 Method for casting surface layer by using TiAlC-base ceramic powder as metal and titanium alloy Expired - Fee Related CN103056340B (en)

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CN104072139A (en) * 2014-06-30 2014-10-01 沈阳化工大学 Preparation method of metallic titanium carbide ceramic
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CN104789808A (en) * 2015-04-29 2015-07-22 陕西理工学院 Titanium-aluminum-carbon-ceramic-reinforced Ti3Al-base composite material and preparation method thereof
CN105478658A (en) * 2015-12-31 2016-04-13 沈阳化工大学 Method for casting titanium alloy casting through sand mold
CN107497999A (en) * 2017-09-01 2017-12-22 东风精密铸造安徽有限公司 A kind of titanium investment pattern precision casting process
CN108436028A (en) * 2018-01-29 2018-08-24 安徽霍山科皖特种铸造有限责任公司 A kind of new type silica sol, water glass composite shell and preparation method thereof
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