Novel cobalt-base alloy for surgical implant and application thereof

Abstract

The invention discloses a novel forgeable cobalt-base alloy for surgical implant and application through which the content of cobalt and chromium is reduced on the basis of the Co-Cr-Mo alloy and the mechanical property and corrosion-resistant property are optimized by adding a proper amount of iron and manganese elements and by adding the nitrogen element. The novel forgeable cobalt-base alloy is characterized by comprising the following chemical components by weight: less than or equal to 0.08 percent of C, 16-24 percent of Cr, 10-20 percent of Fe, 5-20 percent of Mn, 2-6 percent of Mo, 0.2-0.6 percent of N, less than or equal to 0.1 percent of Ni, less than or equal to 0.5 percent of Si, less than or equal to 0.01 percent of S, less than or equal to 0.02 percent of P and the balance of Co. The alloy has excellent mechanical property and corrosion-resistant property, can be used for avoiding the nickel damage and reducing the cost of the alloy, has excellent toughness combination and cold and hot working performance and has important social and economic significance.

Description

technical field [0001] The invention belongs to the field of alloys, and in particular provides a novel cobalt-based alloy for surgical implantation and its application. Background technique [0002] Cobalt-based alloys are alloy materials formed by adding elements such as chromium, nickel, molybdenum, and tungsten to cobalt as a matrix. Cobalt-based alloys are typically represented by cobalt-chromium-molybdenum alloys. They are mainly divided into two basic types: casting and hot forging. Such as cast CoCrMo alloy, forged CoCrMo alloy, CoNiCrMo and so on. Cobalt-based alloys have excellent wear resistance and corrosion resistance. According to their usage, cobalt-based alloys can be divided into cobalt-based wear-resistant alloys, cobalt-based high-temperature resistant alloys and cobalt-based wear-resistant alloys. [0003] Medical cobalt-based alloy has good corrosion resistance, wear resistance and thermal fatigue resistance, high thermal conductivity, low thermal expan...

AI Technical Summary

Problems solved by technology

Therefore, in the existing cobalt-based alloys, except that the cobalt-chromium-molybdenum alloy does not contain nickel elements, other wrought cobalt-based alloys contain more than 9% nickel elements, and nickel ions have great potential toxic and side effects on the human body. sensitization, carcinogenic hazards

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