CN103667800A - Precise forging method for CoCrMo alloy artificial joint - Google Patents
Precise forging method for CoCrMo alloy artificial joint Download PDFInfo
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- CN103667800A CN103667800A CN201310658923.1A CN201310658923A CN103667800A CN 103667800 A CN103667800 A CN 103667800A CN 201310658923 A CN201310658923 A CN 201310658923A CN 103667800 A CN103667800 A CN 103667800A
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Abstract
The invention relates to a precise forging method for a CoCrMo alloy artificial joint. The method comprises the following steps: carrying out blanking and blank making so as to obtain a forging blank material; subjecting the blank material to forging and correction; and finally, carrying out polishing and grit blasting so as to obtain a CoCrMo alloy artificial joint forging. The invention has the following advantages: an appropriate forging temperature range for the CoCrMo alloy artificial joint is determined for the first time, remelting and heat preservation are carried out after forging and correction, so the CoCrMo alloy forging has god strength matching with plasticity.
Description
Technical field
The present invention is a kind of CoCrMo alloy joint prosthesis precision forging method, belongs to metal forging technical field.The method has been filled up the blank of domestic CoCrMo alloy joint prosthesis forging process.
Background technology
Joint prosthesis is one of most important progress of obtaining in 20th century of art of orthopedic surgery, it is made and can only walk by dependance on walking stick over, patient that even can only amputation, can as normal people, walk, also make rheumatoid arthritis and the Osteoarthritis of some joint havocs in late period, by operation, obtained and stood and walking function, partially or completely recovered self care ability.And along with China's aging increased population, the number of suffering from joint disease increases day by day, to the demand of joint prosthesis is corresponding, day by day increase, therefore strengthen the research and development of joint prosthesis are had important practical significance.At present, conventional artificial joint material comprises medical stainless steel, titanium alloy and cobalt base alloy.But the corrosion resistance nature of medical stainless steel is poor, easily there is the regression that metal ion is organized diffusion and embedded material self property towards periphery in it, thereby cause toxic side effect and graft failure in corrosive environment; The wear resisting property of titanium alloy is poor, and its wear particle producing between bone easily causes that bone dissolves, absorbs, and its higher Young's modulus easily produces " stress shielding ", causes graft failure; Although and cobalt base alloy price is higher, there is good corrosion resistance nature, outstanding wear resisting property and lower Young's modulus, it is therefore the ideal material in preparation high-end artificial knee joint, hip joint and the little joint of backbone etc.
At present, the manufacturing process of metallic substance joint prosthesis is divided into casting and forges two kinds, be easier to, and tooling cost is lower, so cobalt base alloy joint prosthesis is to be cast into master owing to casting the processing of joint prosthesis.The method > > that mono-kind of patent CN1203818C < < prepares cobalt base alloy joint prosthesis taper shank provides a kind of casting technique of joint prosthesis taper shank, the method of this process using directional freeze has obtained the higher joint prosthesis foundry goods of dimensional precision, and the CoCrMo alloy joint prosthesis blank salient features of manufacturing according to this technique all meets the requirement of the standard YY0117.3-93 of medicine office of country.But, along with the progressively attention of people to self medical rehabilitation cause and medical safety, people improve constantly the performance requriements of joint prosthesis, new standard YY0117.3-2005 is also stricter to the detection of CoCrMo alloy joint prosthesis performance, therefore casts CoCrMo alloy joint prosthesis conforming product rate and decreases.And with respect to casting joint prosthesis, forge joint prosthesis and obtain tiny, uniform microtexture owing to making thick cast structure obtain fragmentation, therefore there is higher strength and toughness.Many external joint prosthesis manufacturers have released forging CoCrMo alloy joint prosthesis one after another, but because domestic CoCrMo alloy forging technology is also immature, the production of domestic forging CoCrMo alloy joint prosthesis is still blank.Compare with titanium alloy, when cobalt base alloy forges, plasticity is lower, and resistance to deformation is larger, so its forging difficulty is larger, and smithing technological parameter is difficult to determine.For these reasons, often there is the defects such as crackle, filling be discontented in the CoCrMo joint prosthesis that traditional precision die forging process is produced, and conforming product rate is not high, and mechanical property is also difficult to meet the requirement of international standard ISO5832-12.
Summary of the invention
The precision forging technology that the object of this invention is to provide a kind of CoCrMo alloy joint prosthesis.The CoCrMo alloy joint prosthesis forging that adopts this technique to produce to meet international standard ISO5832-12 to require, efficiently solves the problems such as CoCrMo alloy joint prosthesis forge crack, filling be discontented, and conforming product rate is improved greatly.
The object of the invention is to be achieved through the following technical solutions:
This kind of CoCrMo alloy joint prosthesis precision forging method, the chemical composition of described CoCrMo alloy and mass percent are: Cr26.0～30.0%, Mo5.0～7.0%, C≤0.35%, Ni≤1.0%, Fe≤0.75%, Mn≤1.0%, Si≤1.0%, N≤0.25%, surplus is Co, it is characterized in that: steps of the method are:
(1) select CoCrMo alloy bar material, with lathe or band sawing machine blanking, by mechanical workout mode, make blank;
(2) while resistance furnace being heated to 1000 ℃～1050 ℃, put into blank, until resistance furnace, again after temperature, be incubated 20～40min, take out blank and on hydropress, carry out knee, air cooling is to room temperature, and blast, polishes surperficial, removes defect pit, folding, crack defect;
(3) while resistance furnace being heated to 1050 ℃～1100 ℃, put into blank, until resistance furnace, again after temperature, be incubated 20～40min, by mold heated to 200 ℃～350 ℃ and be incubated heat penetration, graphite spraying lubricant in mould cavity, in stove, take out blank, putting into mould cavity forges, then the pre-forging after forging is used to cutting die trimming on bead cutter, the resistance furnace of after trimming, pre-forging being put into again to stove temperature and be 1050 ℃～1100 ℃ melts down insulation 5min～10min, after the water-cooled of coming out of the stove, carry out blast processing, remove surface oxide layer, polishing surface imperfection,
The deflection forging described in this step is that blank is to 85～90% of required deflection between finished product;
(4) while resistance furnace being heated to 1000 ℃～1050 ℃, put into pre-forging, until resistance furnace, again after temperature, be incubated 20～40min, by mold heated to 200 ℃～350 ℃ and be incubated heat penetration, graphite spraying lubricant in mould cavity, in stove, take out pre-forging, put into mould cavity correction and obtain forging, the resistance furnace of after correction, forging being put into again to stove temperature and be 1000 ℃～1050 ℃ melts down insulation 5min～10min, the water-cooled of coming out of the stove, then the overlap of polishing, forging edge trimming is round and smooth, blast is removed surface oxide layer, this forging is CoCrMo alloy joint prosthesis finished product,
The deflection of proofreading and correct described in this step is that blank is to 10～15% of required deflection between finished product.
In forging process, titanium alloy artificial joint is at blocking and proofread and correct rear Direct Air-Cooled to room temperature, and CoCrMo alloy joint prosthesis can melt down insulation after blocking and finish-forging, then water-cooled is to room temperature, this measure is the generation for fear of precipitated phase in CoCrMo alloy forging process, thereby improves intensity and the plasticity of CoCrMo alloy joint prosthesis.
Aspect smithing technological parameter, because CoCrMo alloy contains more high-melting-point element, during forging, plasticity is low, resistance to deformation is large, therefore its forging temperature is higher, and suitable forging temperature interval is narrow, and the smithing technological parameter in the present invention program just obtains through lot of experiments.
With respect to existing CoCrMo alloy joint prosthesis manufacturing process, the present invention has the following advantages:
1. determined the rational knee of CoCrMo alloy, hot closed-die forging, Tc, the resistance to deformation while effectively reducing CoCrMo alloy forging, has avoided the defects such as forge crack, filling be discontented to produce;
2. after hot closed-die forging, correcting process, CoCrMo alloy joint prosthesis forging is melted down to insulation, then water-cooled is to room temperature, can effectively improve CoCrMo alloy joint prosthesis forging intensity and plasticity, thereby guarantee that its mechanical property meets the requirement of international standard ISO5892-12.
Embodiment
The present invention be take CoCrMo alloy artificial hip joint stem and technical solution of the present invention is specifically described as example.
Embodiment:
The chemical composition of this kind of alloy and mass percent are: Cr26.0～30.0%, and Mo5.0～7.0%, C≤0.35%, Ni≤1.0%, Fe≤0.75%, Mn≤1.0%, Si≤1.0%, N≤0.25%, surplus is Co, it is characterized in that: steps of the method are:
(1) select the CoCrMo alloy bar material of Φ 30mm, with lathe or band sawing machine blanking, by mechanical workout mode, make blank, requiring surfaceness is 1.6, checks blank surface quality, if any crackle, pit etc., need defect be removed by the method for polishing, and should guarantee that blank surface is without dirt;
(2) while resistance furnace being heated to 1000 ℃～1050 ℃, put into blank, until resistance furnace, again after temperature, be incubated 30min, by part, take out blank and on hydropress, carry out knee, air cooling is to room temperature, and blast, polishes surperficial, removes defect pit, folding, crack defect;
(3) while resistance furnace being heated to 1050 ℃～1100 ℃, put into blank, until resistance furnace, again after temperature, be incubated 30min, by mold heated to 200 ℃～350 ℃ and be incubated heat penetration, graphite spraying lubricant in mould cavity, in stove, take out blank, putting into mould cavity forges, then the pre-forging after forging is used to cutting die trimming on bead cutter, the resistance furnace of after trimming, pre-forging being put into again to stove temperature and be 1050 ℃～1100 ℃ melts down insulation 10min, after the water-cooled of coming out of the stove, carry out blast processing, remove surface oxide layer, polishing surface imperfection;
The deflection forging described in this step is that blank is to 85～90% of required deflection between finished product;
(4) while resistance furnace being heated to 1000 ℃～1050 ℃, put into pre-forging, until resistance furnace, again after temperature, be incubated 30min, by mold heated to 200 ℃～350 ℃ and be incubated heat penetration, graphite spraying lubricant in mould cavity, in stove, take out pre-forging, put into mould cavity correction and obtain forging, the resistance furnace of after correction, forging being put into again to stove temperature and be 1000 ℃～1050 ℃ melts down insulation 5min～10min, the water-cooled of coming out of the stove, then the overlap of polishing, forging edge trimming is round and smooth, blast is removed surface oxide layer, this forging is CoCrMo alloy joint prosthesis finished product,
The deflection of proofreading and correct described in this step is that blank is to 10～15% of required deflection between finished product.
Through check, the CoCrMo alloy artificial hip joint stem forging of producing by this technique, the defect such as product surface flawless, filling are discontented, conforming product rate reaches more than 90%.CoCrMo alloy artificial hip joint stem forging mechanical property by this explained hereafter meets international standard ISO5832-12 requirement completely, and itself and ISO5832-12 standard-required mechanical property contrast as shown in table 1.
Table 1CoCrMo alloy artificial hip joint stem forging mechanical property and the contrast of ISO5832-12 standard-required mechanical property.
Claims (1)
1. a CoCrMo alloy joint prosthesis precision forging method, the chemical composition of described CoCrMo alloy and mass percent are: Cr26.0～30.0%, Mo5.0～7.0%, C≤0.35%, Ni≤1.0%, Fe≤0.75%, Mn≤1.0%, Si≤1.0%, N≤0.25%, surplus is Co, it is characterized in that: steps of the method are:
(1) select CoCrMo alloy bar material, with lathe or band sawing machine blanking, by mechanical workout mode, make blank;
(2) while resistance furnace being heated to 1000 ℃～1050 ℃, put into blank, until resistance furnace, again after temperature, be incubated 20～40min, take out blank and on hydropress, carry out knee, air cooling is to room temperature, and blast, polishes surperficial, removes defect pit, folding, crack defect;
(3) while resistance furnace being heated to 1050 ℃～1100 ℃, put into blank, until resistance furnace, again after temperature, be incubated 20～40min, by mold heated to 200 ℃～350 ℃ and be incubated heat penetration, graphite spraying lubricant in mould cavity, in stove, take out blank, putting into mould cavity forges, then the pre-forging after forging is used to cutting die trimming on bead cutter, the resistance furnace of after trimming, pre-forging being put into again to stove temperature and be 1050 ℃～1100 ℃ melts down insulation 5min～10min, after the water-cooled of coming out of the stove, carry out blast processing, remove surface oxide layer, polishing surface imperfection,
The deflection forging described in this step is that blank is to 85～90% of required deflection between finished product;
(4) while resistance furnace being heated to 1000 ℃～1050 ℃, put into pre-forging, until resistance furnace, again after temperature, be incubated 20～40min, by mold heated to 200 ℃～350 ℃ and be incubated heat penetration, graphite spraying lubricant in mould cavity, in stove, take out pre-forging, put into mould cavity correction and obtain forging, the resistance furnace of after correction, forging being put into again to stove temperature and be 1000 ℃～1050 ℃ melts down insulation 5min～10min, the water-cooled of coming out of the stove, then the overlap of polishing, forging edge trimming is round and smooth, blast is removed surface oxide layer, this forging is CoCrMo alloy joint prosthesis finished product,
The deflection of proofreading and correct described in this step is that blank is to 10～15% of required deflection between finished product.
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104028770A (en) * | 2014-06-09 | 2014-09-10 | 宝鸡飞利有色金属材料有限公司 | Method for preparing medical spherical Co-Cr-Mo alloy particles |
| CN105256174A (en) * | 2015-10-22 | 2016-01-20 | 东北大学 | Biotic bone composite material and preparing method thereof |
| WO2018188279A1 (en) * | 2017-04-14 | 2018-10-18 | 涿州新卓立航空精密科技有限公司 | Novel artificial joint alloy and smelting process therefor |
| WO2018192180A1 (en) * | 2017-04-17 | 2018-10-25 | 涿州新卓立航空精密科技有限公司 | Forged artificial joint and novel production process and use of metal product |
| CN109680185A (en) * | 2019-01-15 | 2019-04-26 | 江苏奇纳新材料科技有限公司 | The CoCrMo alloy and its smelting technology of nitrogen pick-up |
| CN109822023A (en) * | 2019-02-21 | 2019-05-31 | 凯里学院 | A kind of heat cladding forging method of cobalt-base alloys ingot |
| CN110369655A (en) * | 2019-08-08 | 2019-10-25 | 无锡航亚科技股份有限公司 | A kind of forging method of CoCrMo tibial plateau prosthetic joint implants |
| CN110369654A (en) * | 2019-08-08 | 2019-10-25 | 无锡航亚科技股份有限公司 | A kind of forging method of titanium alloy tibial plateau prosthetic joint implants |
| CN110586823A (en) * | 2019-09-12 | 2019-12-20 | 中国航发北京航空材料研究院 | Aluminum alloy over-temperature forging method |
| CN111534721A (en) * | 2020-05-21 | 2020-08-14 | 宿迁学院 | Co-Cr-Mo-N alloy and preparation method thereof |
| CN111575539A (en) * | 2020-04-23 | 2020-08-25 | 中国科学院金属研究所 | Preparation method of hot-working cobalt-based alloy rod wire |
| CN112247046A (en) * | 2020-09-30 | 2021-01-22 | 无锡航亚科技股份有限公司 | Forging method of alloy femoral stem forging |
| CN114273861A (en) * | 2021-12-27 | 2022-04-05 | 无锡航亚科技股份有限公司 | Forging method of TC4 cross special-shaped wing plate tibial tray artificial joint implant |
| CN115698351A (en) * | 2020-05-11 | 2023-02-03 | 海恩斯国际公司 | Deformable chromium-containing cobalt-based alloys with improved resistance to galling and chloride-induced crevice attack |
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| JP2012246510A (en) * | 2011-05-25 | 2012-12-13 | Kobe Steel Ltd | METHOD FOR MANUFACTURING Co-BASED ALLOY FOR LIVING BODY |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104028770A (en) * | 2014-06-09 | 2014-09-10 | 宝鸡飞利有色金属材料有限公司 | Method for preparing medical spherical Co-Cr-Mo alloy particles |
| CN105256174A (en) * | 2015-10-22 | 2016-01-20 | 东北大学 | Biotic bone composite material and preparing method thereof |
| WO2018188279A1 (en) * | 2017-04-14 | 2018-10-18 | 涿州新卓立航空精密科技有限公司 | Novel artificial joint alloy and smelting process therefor |
| WO2018192180A1 (en) * | 2017-04-17 | 2018-10-25 | 涿州新卓立航空精密科技有限公司 | Forged artificial joint and novel production process and use of metal product |
| CN109680185A (en) * | 2019-01-15 | 2019-04-26 | 江苏奇纳新材料科技有限公司 | The CoCrMo alloy and its smelting technology of nitrogen pick-up |
| CN109822023A (en) * | 2019-02-21 | 2019-05-31 | 凯里学院 | A kind of heat cladding forging method of cobalt-base alloys ingot |
| CN110369654B (en) * | 2019-08-08 | 2020-09-25 | 无锡航亚科技股份有限公司 | Forging method of titanium alloy tibial plateau artificial joint implant |
| CN110369654A (en) * | 2019-08-08 | 2019-10-25 | 无锡航亚科技股份有限公司 | A kind of forging method of titanium alloy tibial plateau prosthetic joint implants |
| CN110369655B (en) * | 2019-08-08 | 2020-08-21 | 无锡航亚科技股份有限公司 | Forging method of CoCrMo tibial plateau artificial joint implant |
| CN110369655A (en) * | 2019-08-08 | 2019-10-25 | 无锡航亚科技股份有限公司 | A kind of forging method of CoCrMo tibial plateau prosthetic joint implants |
| CN110586823A (en) * | 2019-09-12 | 2019-12-20 | 中国航发北京航空材料研究院 | Aluminum alloy over-temperature forging method |
| CN111575539A (en) * | 2020-04-23 | 2020-08-25 | 中国科学院金属研究所 | Preparation method of hot-working cobalt-based alloy rod wire |
| CN111575539B (en) * | 2020-04-23 | 2021-07-23 | 中国科学院金属研究所 | Preparation method of hot-working cobalt-based alloy rod wire |
| CN115698351A (en) * | 2020-05-11 | 2023-02-03 | 海恩斯国际公司 | Deformable chromium-containing cobalt-based alloys with improved resistance to galling and chloride-induced crevice attack |
| CN111534721A (en) * | 2020-05-21 | 2020-08-14 | 宿迁学院 | Co-Cr-Mo-N alloy and preparation method thereof |
| CN111534721B (en) * | 2020-05-21 | 2021-10-29 | 宿迁学院 | Co-Cr-Mo-N alloy and preparation method thereof |
| CN112247046A (en) * | 2020-09-30 | 2021-01-22 | 无锡航亚科技股份有限公司 | Forging method of alloy femoral stem forging |
| CN114273861A (en) * | 2021-12-27 | 2022-04-05 | 无锡航亚科技股份有限公司 | Forging method of TC4 cross special-shaped wing plate tibial tray artificial joint implant |
| CN114273861B (en) * | 2021-12-27 | 2023-09-01 | 无锡航亚科技股份有限公司 | Forging method of TC4 cross special-shaped wing plate tibial tray artificial joint implant |
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Application publication date: 20140326 |