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热处理是机械制造工艺中的重要工序,由于热处理不当而造成的质量问题,往往会影响产品的使用寿命。然而,也有一些质量事故,从表面上看似乎是热处理的责任,但进一步调查分析,却与热处理根本无关。现举例说明,以“正本清源,澄清事实”,使我们在工作中不为假象所迷惑。轴瓦被腐蚀影响主轴寿命我厂生产的高精度外圆磨床主轴,除出口产品及MG1431型磨床系采用38CrMoAl氮化钢外,多数是采用9Mn2V合金工具钢或GCr15轴承钢。主轴经锻造→球化退火→调质→机械加工→中频表面淬火→精磨→超精磨。轴瓦则采用30％铅青铜。由于主轴轴径
Heat treatment is an important process in the mechanical manufacturing process. The quality problems caused by improper heat treatment often affect the service life of the product. However, there are also some quality accidents that appear superficially responsible for heat treatment, but further investigation and analysis have nothing to do with heat treatment. By way of example, we are trying to “clarify the facts in the first place and clarify the facts,” so that we are not fooled by illusion in our work. Bearing bush corrosion is affected spindle life I produced high-precision cylindrical grinding spindle, with the exception of export products and MG1431-type grinding machine with 38CrMoAl nitrided steel, the majority is the use of 9Mn2V alloy tool steel or GCr15 bearing steel. Spindle forging → ball annealing → quenching and tempering → machining → IF surface hardening → grinding → super-precision grinding. Bearing is the use of 30% lead bronze. Due to the spindle shaft diameter