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一、绪言 钢的尺寸稳定性系指钢在热处理与加工完毕后。在不受外力作用或在低于其弹性极限的应力作用下抵抗永久形变的能力。目前精密机械与仪器的精度日益提高。很多精密零件的相对尺寸精度已达到10~(-6)——10(-7),因此对材料的尺寸稳定性提出了极高的要求。滚动轴承钢是精密
First, the introduction of steel dimensional stability refers to the steel after the heat treatment and processing. Ability to resist permanent deformation without external force or under stress below its elastic limit. The accuracy of precision machinery and instruments is increasing day by day. The relative dimensional accuracy of many precision parts has reached 10 -6 (-6) - 10 (-7), so the dimensional stability of the material made a very high demand. Rolling bearing steel is precision