对16Cr14Co12Mo5耐热耐蚀轴承钢在1050℃高温淬火后，在490～540℃两次回火后的组织性能以及强韧化机制进行研究。结果表明：随着回火温度的升高，抗拉强度Rm逐渐增加，最大时超过了1900MPa，屈服强度Rp0.2在500℃回火后达到1400MPa，随后逐渐减小；断面收缩率和伸长率略有减小，而硬度略有增长。材料强韧化主要源于高位错板条马氏体以及其中残余奥氏体薄膜和沉淀析出的碳化物和金属间化合物。采取适宜淬回火工艺制度所导致弥散析出的碳化物和金属间化合物是试样的强度和韧性达到最佳配合的关键。
After quenching at 1050℃, microstructures and Mechanical Properties and mechanism of strength-toughening of heat and corrosion resistant bearing steel 16Cr14Co12Mo5 was investigated after 490-540℃ double tempering. The results show that the tensile strength Rm gradually increases and its Maximum is above 1900MPa;the yielding strength Rp0.2 is above 1400MPa after tempering at 500℃ and then decrease gradually; both A and Z decrease slightly, but HRC increase fairly small. The strength-toughening of material mainly comes of high density dislocation martensitic laths, residual anstenitic between martensitic, precipitation of carbides and intermetallic compounds. The precipitation of carbides and intermetallic compounds, which was the key to achieve the best match between strength and toughness of samples, was obtained through appropriately quenching and tempering technology.
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