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CoCrMo alloy is a kind of cobalt-based alloy which is resistant to wear and corrosion

CoCrMo alloy introduction
CoCrMo alloy (cobalt-chromium molybdenum) is one of the cobalt-base alloys, is also commonly known as a Stellite alloy, is a kind of wear and corrosion resistance of the cobalt-base alloy. The original cobalt base alloy is a cobalt-chromium binary alloy, later developed into a cobalt-chromium tungsten ternary component, and then later the development of cobalt-chromium molybdenum alloy. The cobalt-chromium molybdenum alloy is mainly composed of cobalt and contains a considerable amount of chromium, molybdenum and a small amount of nickel, carbon and other alloying elements, and occasionally also contains alloys such as iron. Depending on the composition of the alloy, they can be made into welding wire, powder for hard surfacing, thermal spraying, spray welding and other processes, as well as cast and forged parts and powder metallurgy parts.
CoCrMo alloy classification
Cobalt and chromium are two basic elements of cobalt-based alloys while adding molybdenum can produce finer grains and higher strength after casting or forging. Cobalt-chrome-molybdenum alloys are basically divided into two categories: CoCrMo alloy and CoNiCrMo alloy;
1. The CoCrMo alloy
The first category is CoCrMo alloys, usually cast products; In recent years, the synthetic mechanical properties of deformed cobalt-chromium-molybdenum alloy products have been greatly improved by technological improvement.

2. CoNiCrMo alloy
The other is CoNiCrMo alloys, which are usually (hot) forged and precision machined. Cast CoCrMo alloys have been used in dentistry for decades and are currently used to make artificial joints, while forged CoNiCrMo alloys are used to make heavy joints that can withstand heavy loads such as knees and hips. CoNiCrMo alloy is one of the promising forging cobalt-base alloy, originally called MP35N, when under stress, can be in the water of the sea (containing chloride ions) has high corrosion resistance, cold working can increase the strength of the alloy, but cold work have considerable difficulty, especially in manufacturing large devices, such as hip handle, only hot forging was suitable.
CoNiCrMo alloy wear-resistant properties of forging and casting CoCrMo alloy has good fatigue resistance and the advantage of high tensile strength, so it is suitable for application in long life and do not need or stress fatigue fracture, hip place of artificial joints, for example, for the implant is deeply embedded in the femoral bone marrow catheter this difficult and costly in terms of operation, This advantage is very important.
The elastic modulus of cobalt-based alloys does not change with the maximum tensile strength, which ranges from 220 to 234 GPa and is higher than that of other materials such as stainless steel.
CoCrMo alloys are particularly susceptible to work hardening and therefore cannot be manufactured in the same way as other metals, requiring vacuum precision casting instead. Controlling the mold temperature can control the grain size of the casting. The formation of coarse grains at higher temperatures will reduce the strength, but it will also precipitate large and far apart carbides and reduce the brittleness of the material.
CoCrMo alloy supplier
As a global CoCrMo alloy supplier, Tanki New Materials Co.Ltd has rich experiences in the properties, applications, and cost-effective manufacturing of advanced and engineered materials. Tanki New Materials Co.Ltd Aims to help All industries and Chemical Wholesalers to find high-quality, cheap price Nanomaterials and chemicals by providing turn-key customize manufacturing services. If you are looking for CoCrMo alloy, please feel free to send an inquiry for the latest CoCrMo alloy price.
 

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