Precise forging method for CoCrMo alloy artificial joint

An artificial joint and precision forging technology, applied in the field of metal forging, can solve problems such as forging cracks and filling dissatisfaction, achieve the effects of reducing deformation resistance, improving strength and plasticity, and avoiding forging cracks

Inactive Publication Date: 2014-03-26
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

This process can produce CoCrMo alloy artificial joint forgings that meet the requirements of the international standard ISO5832-12, effectively solving the problems of forging cracks and filling dissatisfaction of CoCrMo alloy artificial joints, and greatly improving the qualified rate of products

Method used

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  • Precise forging method for CoCrMo alloy artificial joint

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Experimental program
Comparison scheme
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Embodiment

[0020] The chemical composition and mass percentage of this alloy 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%, the balance being Co, characterized in that: the steps of the method are:

[0021] ⑴Choose Φ30mm CoCrMo alloy rods, blank them with a lathe or band saw, and make blanks by machining. The surface roughness is required to be 1.6. Check the surface quality of the blanks. Remove the defects and ensure that there is no dirt on the surface of the billet;

[0022] ⑵Heat the resistance furnace to 1000 ℃ ~ 1050 ℃, put in the billet, wait for the resistance furnace to reach the temperature again, keep it warm for 30 minutes, take out the billet one by one and bend it on the hydraulic press, after air cooling to room temperature, blow sand, polish the surface, remove Defect pit, fold, crack defect;

[0023] (3) Put the billet into the resistance furnace when it is heated to 1050°C-1100°C, and keep it warm for 30 minutes after the resist...

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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 [0001] The invention relates to a CoCrMo alloy artificial joint precision forging method, which belongs to the technical field of metal forging. This method fills in the blank of domestic CoCrMo alloy artificial joint forging technology. Background technique [0002] Artificial joints are one of the most important advances in the field of orthopedic surgery in the 20th century. It enables patients who used to rely on crutches to walk, or even amputated limbs, to walk like normal people. Patients with rheumatoid arthritis and osteoarthritis have obtained standing and walking functions through surgery, and partially or completely recovered their ability to take care of themselves. With the increase of the aging population in our country, the number of people suffering from joint diseases is increasing day by day, and the demand for artificial joints is correspondingly increasing. Therefore, it is of great practical significance to increase the research and dev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/07C22F1/10A61L27/04B23P15/00B21J5/06
Inventor 林莺莺牟哲唐志今杨大伟林海
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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