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传统中、高碳弹簧钢在性能、生产和使用上存在许多缺点 ,为适应汽车工业发展的需要 ,研究了碳含量较低的新型低碳马氏体弹簧钢 35 Si2 Cr VB。经与传统弹簧钢 6 0 Si2 Mn A相比较 ,该钢不仅有高的强度、塑韧性 ,良好的综合力学性能 ,而且具有低的脱碳敏感性、高的淬透性和高的弹减抗力等。显微组织观察发现 ,由于 35 Si2 Cr VB钢的含碳量降低 ,其淬火组织发生了变化 ,几乎全是具有高位错密度的板条状马氏体 ,而只有极少量孪晶结构的片状马氏体
Traditionally, high carbon spring steel has many shortcomings in performance, production and use. In order to meet the needs of the automotive industry, a new type of low carbon martensitic spring steel 35 Si2 Cr VB with low carbon content was studied. Compared with the traditional spring steel 60Si2MnA, the steel not only has high strength, plasticity and toughness, good comprehensive mechanical properties, but also has low decarburization sensitivity, high hardenability and high resistance to elastic deformation Wait. Microstructure observation showed that the quenched microstructure of 35 Si2 Cr VB steels changed almost completely because of the low carbon content of 35 Si2 Cr VB steels, almost all of them were lath martensite with high dislocation density, Martensite