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一、粉末冶金的配方及其依据根据滚动轴承的工作特点,受力情况,破坏形式,要求轴承材料具有较高的强度和抗接触疲劳强度、较高的弹性极限,足够的耐磨性和强度,较高的淬透性和回火稳定性,较低的残余奥氏体量和一定韧性.对比了我厂的铁基粉末制品,性软(HB70～90),径向任溃强度(K值)为30～40公斤/毫米~2,不能达到要求.所以,我们在试制过程中.充分发挥了粉末冶金能将各种不同熔点的金属元素混合、烧结、扩散的优点,分析了锰、硅、二硫化钼、稀土等元素的特性,找出主要矛盾方面,用一分为二的观点,看待各元素在材料中所起的积极和消极作用,使它们
First, the formula of powder metallurgy and its basis According to the working characteristics of rolling bearings, the force situation, the destruction of forms require bearing material with high strength and resistance to contact fatigue strength, high elastic limit, adequate wear resistance and strength, High hardenability and tempering stability, low residual austenite content and a certain toughness.Compared with our iron-based powder products, soft (HB70 ~ 90), radial collapse strength (K value ) 30 ~ 40 kg / mm ~ 2, can not meet the requirements, so we in the trial process, give full play to the powder metallurgy can melt a variety of different melting point metal elements, sintering, diffusion advantages, analysis of manganese, silicon , Molybdenum disulfide, rare earth and other elements of the characteristics of the main contradictions to identify the use of halve the point of view of the elements in the material played a positive and negative role in making them