The content of the invention
An object of the present invention is to propose a kind of joint prosthesis.
The second object of the present invention is to propose a kind of heat treatment method of joint prosthesis.
Realized especially by following technological means：
1. a kind of joint prosthesis, the material of the joint prosthesis is titanium alloy, the composition percentage by weight of the titanium alloyIt is than content：Al：4.5 ~ 5.2%, Ga：2.5 ~ 6.8%, V：3.8 ~ 4.8%, surplus is titanium and inevitable impurity, and in impurityFe≤0.20%, C≤0.05%, N≤0.01%；
Preparation method comprises the following steps：
（1）Raw material prepares and melting：From titanium sponge as electrode, in vacuum≤10Pa vacuum plasma welding chamberWelding electrode, uses vacuum consumable electrode arc furnace to carry out melting twice for titanium ingot casting；The titanium ingot casting and the middle of Ga, Al and V are closedGold is added to the melts of titanium alloy that required composition is smelted into vacuum melting furnace jointly；
（2）Hot investment casting：By step（1）Obtained melt is manually closed after being incubated using the method for hot investment castingSave semi-finished product；
（3）Annealing：By step（2）Obtained joint prosthesis semi-finished product are encased in vacuum induction heat-treatment furnace and heatedTo 520 ~ 590 DEG C, 40 ~ 50min is incubated, 620 ~ 690 DEG C are heated to, 20 ~ 30min is incubated, 750 ~ 780 DEG C, guarantor are heated toRoom temperature is air-cooled to after 55 ~ 65min of temperature；
（4）Artificial aging：By step（3）Joint prosthesis semi-finished product after processing, which are inserted, is heated to 310 ~ 360 in aging furnaceDEG C, insulation is cooled to room temperature after 4 ~ 6 hours；
（5）Subzero treatment：Joint prosthesis semi-finished product after artificial aging insert deep cooling box, cool to -120 ~ -180 DEG C, deeplyRoom temperature is returned to after 25 ~ 35min of cold treatment；
（6）Solution treatment：Joint prosthesis semi-finished product after subzero treatment are inserted in Solution Treatment Furnace, it is heated to 820 ~860 DEG C, water quenching after being incubated 0.8 ~ 1.2 hour；
（7）Second of artificial aging：Joint prosthesis semi-finished product after solution treatment are inserted in aging furnace and are heated to 320 ~360 DEG C, insulation is cooled to room temperature after 4 ~ 6 hours, that is, obtains joint prosthesis finished product.
Preferably, tensile strength >=980MPa of the joint prosthesis, elongation >=20% after forging, the contraction percentage of area >=45%。
Preferably, the modulus of elasticity of the joint prosthesis is 58 ~ 72GPa.
Preferably, the tensile strength of the joint prosthesis：Elongation after 990 ~ 1200MPa, forging：20 ~ 28%, section is receivedShrinkage：45 ~ 52%, modulus of elasticity is 59 ~ 71GPa.
A kind of manufacture method of joint prosthesis, comprises the following steps：
（1）Raw material prepares and melting：From titanium sponge as electrode, in vacuum≤10Pa vacuum plasma welding chamberWelding electrode, uses vacuum consumable electrode arc furnace to carry out melting twice for titanium ingot casting；The titanium ingot casting and the middle of Ga, Al and V are closedGold is added to the melts of titanium alloy that required composition is smelted into vacuum melting furnace jointly；
（2）Hot investment casting：By step（1）Obtained melt is manually closed after being incubated using the method for hot investment castingSave semi-finished product；
（3）Annealing：By step（2）Obtained joint prosthesis semi-finished product are encased in vacuum induction heat-treatment furnace and heatedTo 520 ~ 590 DEG C, 40 ~ 50min is incubated, 620 ~ 690 DEG C are heated to, 20 ~ 30min is incubated, 750 ~ 780 DEG C, guarantor are heated toRoom temperature is air-cooled to after 55 ~ 65min of temperature；
（4）Artificial aging：By step（3）Joint prosthesis semi-finished product after processing, which are inserted, is heated to 310 ~ 360 in aging furnaceDEG C, insulation is cooled to room temperature after 4 ~ 6 hours；
（5）Subzero treatment：Joint prosthesis semi-finished product after artificial aging insert deep cooling box, cool to -120 ~ -180 DEG C, deeplyRoom temperature is returned to after 25 ~ 35min of cold treatment；
（6）Solution treatment：Joint prosthesis semi-finished product after subzero treatment are inserted in Solution Treatment Furnace, it is heated to 820 ~860 DEG C, water quenching after being incubated 0.8 ~ 1.2 hour；
（7）Second of artificial aging：Joint prosthesis semi-finished product after solution treatment are inserted in aging furnace and are heated to 320 ~360 DEG C, insulation is cooled to room temperature after 4 ~ 6 hours, that is, obtains joint prosthesis finished product；
The material of the joint prosthesis is titanium alloy, and the composition content by weight percentage of the titanium alloy is：Al：4.5~5.2%, Ga：2.5 ~ 6.8%, V：3.8 ~ 4.8%, surplus is titanium and inevitable impurity.
Preferably, described Ga, Al and V intermediate alloy are Ti-Ga, Ti-Al and Ti-V intermediate alloy.
Preferably, step（1）In, from titanium sponge as electrode, in 1 ~ 6Pa of vacuum vacuum plasma welding chamberWelding electrode.
Preferably, in the subzero treatment, the joint prosthesis semi-finished product after artificial aging insert deep cooling box, first coolTo after -69 ~ -88 DEG C, maintain after 10 ~ 22min of temperature, continue to be cooled to -140 ~ -180 DEG C, maintain to recover after 26 ~ 30min of temperatureTo room temperature.
Effect of the invention is that：
1, specific titanium alloy is handled by reasonable heat treating regime so that the property such as intensity, modulus of elasticity of joint prosthesisWhat can all be obtained increases substantially；
2, in heat treatment process, people is set by setting subzero treatment, and before subzero treatment, after annealingWork Ageing Treatment so that even tissue, is handled by the setting solution treatment after subzero treatment and artificial aging again,So that after microstructure crystal grain refinement and even tissue, strengthen to intensity, after reinforcing further cause springformAmount is improved, so that the property indices of joint prosthesis are better than existing joint prosthesis；
3, Reasonable adjustment is carried out by the component to joint prosthesis material titanium alloy, by adding Ga in Ti-Al alloysTo improve intensity, by using cooperatively to reach corrosion resistance for Ga and V, and conjunction is reached by setting the content of each elementReason coordinates with heat treatment and improves properties.
Embodiment 1
A kind of heat treatment method of joint prosthesis, the material of the joint prosthesis is titanium alloy, the composition of the titanium alloyContent is by weight percentage：Al：4.9%, Ga：4.1%, V：4.1%, surplus is titanium and inevitable impurity.Including following stepSuddenly：
（1）Raw material prepares and melting：From titanium sponge as electrode, in vacuum in 3Pa vacuum plasma welding chamberWelding electrode, uses vacuum consumable electrode arc furnace to carry out melting twice for titanium ingot casting；By the titanium ingot casting and Ti-Ga, Ti-Al and Ti-VIntermediate alloy is added to the melts of titanium alloy that required composition is smelted into vacuum melting furnace jointly；
（2）Hot investment casting：By step（1）Obtained melt is manually closed after being incubated using the method for hot investment castingSave semi-finished product；
（3）Annealing：By step（2）Obtained joint prosthesis semi-finished product are encased in vacuum induction heat-treatment furnace and heatedTo 560 DEG C, 45min is incubated, 660 DEG C are heated to, 26min is incubated, room is air-cooled to after being heated to 770 DEG C, insulation 59minTemperature；
（4）Artificial aging：By step（3）Joint prosthesis semi-finished product after processing, which are inserted in aging furnace, is heated to 331 DEG C, guarantorTemperature is cooled to room temperature after 5 hours；
（5）Subzero treatment：Joint prosthesis semi-finished product after artificial aging insert deep cooling box, cool at -160 DEG C, deep coolingRoom temperature is returned to after reason 29min；
（6）Solution treatment：Joint prosthesis semi-finished product after subzero treatment are inserted in Solution Treatment Furnace, 850 DEG C are heated to,Water quenching after being incubated 1 hour；
（7）Second of artificial aging：Joint prosthesis semi-finished product after solution treatment are inserted 350 are heated in aging furnaceDEG C, insulation is cooled to room temperature after 5 hours, that is, obtains joint prosthesis finished product.
Embodiment 2
A kind of heat treatment method of joint prosthesis, the material of the joint prosthesis is titanium alloy, the composition of the titanium alloyContent is by weight percentage：Al：5.0%, Ga：2.9%, V：4.0%, surplus is titanium and inevitable impurity.
Comprise the following steps：
（1）Raw material prepares and melting：From titanium sponge as electrode, in vacuum 0.8Pa vacuum plasma welding chamberWelding electrode, uses vacuum consumable electrode arc furnace to carry out melting twice for titanium ingot casting；By the titanium ingot casting and Ti-Ga, Ti-Al and Ti-VIntermediate alloy is added to the melts of titanium alloy that required composition is smelted into vacuum melting furnace jointly；
（2）Hot investment casting：By step（1）Obtained melt is manually closed after being incubated using the method for hot investment castingSave semi-finished product；
（3）Annealing：By step（2）Obtained joint prosthesis semi-finished product are encased in vacuum induction heat-treatment furnace and heatedTo 569 DEG C, 43min is incubated, 681 DEG C are heated to, 22min is incubated, room is air-cooled to after being heated to 769 DEG C, insulation 58minTemperature；
（4）Artificial aging：By step（3）Joint prosthesis semi-finished product after processing, which are inserted in aging furnace, is heated to 345 DEG C, guarantorTemperature is cooled to room temperature after 4.8 hours；
（5）Subzero treatment：Joint prosthesis semi-finished product after artificial aging insert deep cooling box, first cool to after -81 DEG C, maintainAfter temperature 19min, continue to return to room temperature after cooling to -160 DEG C, subzero treatment 28min；
（6）Solution treatment：Joint prosthesis semi-finished product after subzero treatment are inserted in Solution Treatment Furnace, 840 DEG C are heated to,Water quenching after being incubated 0.9 hour；
（7）Second of artificial aging：Joint prosthesis semi-finished product after solution treatment are inserted 351 are heated in aging furnaceDEG C, insulation is cooled to room temperature after 5 hours, that is, obtains joint prosthesis finished product.