Powder metallurgy method for preparing high-density complicated shape titanium alloy product

A complex shape, powder metallurgy technology, applied in the field of preparation of titanium alloy products, can solve the problems of high cost of titanium alloy products, low utilization rate of raw materials, difficult processing of titanium alloys, etc., so as to save processing costs and avoid machining processes. , to avoid the effect of the blanking stage

Inactive Publication Date: 2008-08-13
GUIZHOU TAIYI TECH DEV
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Problems solved by technology

This method has the disadvantages of complex process, high energy consumption, low utilization rate of raw materials, and low yield. At the same time, titanium alloy itself is difficult to process, which results in high co

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Mix Ti powder with a certain particle size distribution and added powder containing Al, V, Fe and Mo elements. The particle size ratio of titanium powder is: -100 mesh ~ +150 mesh titanium powder accounts for 84wt%, -325 mesh Titanium powder accounts for 16wt%; in the added powder, the proportions of each element in the mixed powder are: Al element accounts for 6wt%, V element accounts for 4wt%, Fe element accounts for 0wt%, and Mo element accounts for 0wt%. After mixing evenly, the powder is formed by bidirectional molding with a pressing pressure of 500 MPa. In the subsequent multi-stage sintering process, the formed green body was first held at a low temperature stage of 120 °C for 30 minutes, then heated to 850 °C at a heating rate of 10 °C / min, and then heated to 1260 °C at a heating rate of 2 °C / min. ℃, and keep warm for 5 hours. The sintering atmosphere is vacuum, and the vacuum degree is controlled at 1×10 -2 ~1×10 -3 Pa. After the heat preservation is over,...

Embodiment 2

[0014] Ti powder with a certain particle size distribution and added powder containing Al, V, Fe and Mo elements are used for mixing. Among them, the particle size ratio of titanium powder is: -150 mesh ~ +250 mesh titanium powder accounts for 73wt%, -250 ~ +400 mesh titanium powder accounted for 27wt%; in the added powder, the proportions of each element in the mixed powder were: Al element accounted for 4.5wt%, V element accounted for 3wt%, Fe element accounted for 2wt%, and Mo element accounted for 1wt%. After mixing evenly, the powder is formed by cold isostatic pressing with a pressing pressure of 400 MPa. In the subsequent multi-stage sintering process, the shaped body was first held at a low temperature stage of 100 °C for 1 hour, then heated to 900 °C at a heating rate of 15 °C / min, and then heated to 1320 °C at a heating rate of 4 °C / min. ℃, and keep warm for 4 hours. The sintering atmosphere is protected by argon. After the heat preservation is over, it is quenched...

Embodiment 3

[0016] Mix Ti powder with a certain particle size distribution and added powder containing Al, V, Fe and Mo elements. The particle size ratio of titanium powder is: -100 mesh to +200 mesh titanium powder accounts for 71wt%, -250 mesh Titanium powder accounts for 29wt%; in the added powder, the proportions of each element in the mixed powder are: Al element accounts for 3wt%, V element accounts for 2wt%, Fe element accounts for 0.4wt%, and Mo element accounts for 0.3wt%. After mixing evenly, the powder is formed by one-way molding with a floating female mold with a pressing pressure of 400 MPa. In the subsequent multi-stage sintering process, the formed body was first held at a low temperature stage of 90 °C for 2 hours, then heated to 800 °C at a heating rate of 20 °C / min, and then heated to 1200 °C at a heating rate of 3 °C / min. ℃, and keep warm for 7 hours. The sintering atmosphere is vacuum, and the vacuum degree is controlled at 1×10 -2 ~1×10 -3 Pa. After the heat pres...

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Abstract

A powder metallurgy method for producing titanium alloy products with high density and a complicated shape by using Ti powder and additive powder containing Al, V, Fe, and Mo elements as raw materials, comprising mixing the Ti powder with a certain granularity proportion and the additive powder with a certain component range evenly, preparing powder green bodies by using a cold press forming method, using a multi-stage heating technique giving priority to middle-low temperature quick heating and high temperature slow heating during sinter process, performing quenching immediately after the heating process is completed, thereby prepares the Ti alloy sintering blank, and the titanium alloy products with high density and a complicated shape are finally produced by forge work and subsequent anneal process. Since the powder metallurgy technique has the characteristics of near net shape and easily control components, alloying is realized easily. At the same time, the high-usage of raw material is provided, the raw material cost and processing cost are saved, and the production energy consumption is reduced greatly. The method is suitable for producing titanium alloy products with high density and a complicated shape.

Description

Technical field: [0001] The invention relates to a method for preparing titanium alloy products, in particular to a powder metallurgy method for preparing high-density and complex-shaped titanium alloy products. Background technique: [0002] At present, high-density and complex-shaped titanium alloy products, such as golf club heads, engine turbine blades, dental tools, spectacle frames, and car wipers, usually use a series of processes such as casting and subsequent machining, thermal processing, and heat treatment. Method preparation. This method has the disadvantages of complex process, high energy consumption, low utilization rate of raw materials, and low yield. At the same time, titanium alloy itself is difficult to process, which results in high cost of high-density and complex-shaped titanium alloy products. There is no relevant public report on the preparation of high-density and complex-shaped titanium alloy products by powder metallurgy. Invention content: ...

Claims

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Application Information

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IPC IPC(8): B22F3/16B22F1/00
Inventor 王智勇
Owner GUIZHOU TAIYI TECH DEV
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