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Medical titanium alloy artificial joint precise forging method

An artificial joint and precision forging technology, which is applied in the field of metal forging, can solve the problems of low raw material utilization rate, high die loss, and high production cost, and achieve the effect of increasing raw material utilization rate, small die loss, and reducing production cost

Active Publication Date: 2014-03-26
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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Problems solved by technology

However, in this process, the cut Ti6Al4V alloy rod is directly used as the raw material for die forging. There are many raw materials for die forging, and two die forgings are required. Therefore, the load required for forging is large, the die loss is high, and the utilization rate of raw materials is low. , resulting in higher production costs

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  • Medical titanium alloy artificial joint precise forging method
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  • Medical titanium alloy artificial joint precise forging method

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Embodiment Construction

[0023] The technical scheme of the present invention will be described in further detail below in conjunction with accompanying drawing and embodiment:

[0024] See attached Figure 1~3 As shown, the method of the present invention will be specifically described below taking the Ti6Al7Nb medical titanium alloy artificial hip joint handle as an example. The steps of this method are:

[0025] ⑴Select Φ35mm bar raw material, use lathe or band sawing machine to cut the material, the cutting length is 162±2mm, and make the billet by mechanical processing. The billet is processed from one end into a short diameter section with a length of 105±5mm and a diameter of Φ25mm 1. Starting from the other end, the billet is a long diameter section 2 with a length of 30±2mm to maintain the original bar diameter, and a tapered surface 3 is used to transition between the short diameter section 1 and the long diameter section 2;

[0026] The surface roughness of the blank is required to be 1.6...

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Abstract

The invention discloses a medical titanium alloy artificial joint precise forging method. According to the method, Ti6A17Nb alloy bar materials are fed and made into blanks first, the blanks are heated in a resistance furnace to 840-880DEG C, the heat of the blanks is preserved for 30-60 minutes, rod bending is conducted, sand blowing is conducted, surface defects are polished, and glass lubricant dip-coating is conducted; the blanks are heated in the resistance furnace to 900-960DEG C, the heat of the blanks is preserved for 30-60 minutes, in-die forging forming is conducted, edge cutting is connected on an edge cutting machine, sand blowing is conducted so as to remove surface oxidation layers, and surface defects are polished; the blanks are heated in the resistance furnace to 750-780DEG C, the heat is preserved for 30-60 minutes, polishing and sand blowing treatment are conducted, and finally Ti6A17Nb medical titanium alloy artificial joint forge piece finished products are obtained. According to the method, the processes of blank making and rod bending are further arranged before die forging, so that the material utilization rate is improved, and the production cost is greatly reduced; a rectification process is added after die forging, so that the size precision of forge pieces is improved, forging defects are reduced, and the product pass rate is improved.

Description

technical field [0001] The invention relates to a precision forging method for a medical titanium alloy artificial joint, belonging to the technical field of metal forging. Background technique [0002] Titanium and titanium alloys are widely used in the biomedical field due to their low density, high strength, low elastic modulus, excellent corrosion resistance, and good biocompatibility. They are ideal raw materials for the production of complex surgical implants. The titanium alloys implanted in early surgery were mainly pure titanium and Ti6Al4V alloy, but with the deepening of the application, the shortcomings of pure titanium and Ti6Al4V alloy were also found. The strength is high, but the V element contained is harmful to the human body. Therefore, the medical titanium alloy Ti6Al7Nb, which replaces V with Nb, was developed and used to produce artificial joints. The Swiss Sulzer Medical Technology Company first used Ti6Al7Nb alloy to produce hip joint handles in 198...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00B21J5/02
CPCA61F2/3094B23P15/00
Inventor 林莺莺牟哲杨大伟唐志今林海
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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