摘要
针对不同碳含量的NiCrMo淬火和低温回火高强度结构钢,通过微观组织结构分析、准静态拉伸、 低温Charpy-V冲击和K1c断裂韧性试验和断口形貌分析,以建立力学性能-微观组织-碳含量 之间的关系。结果表明:随着碳含量的增加,材料的强度与硬度呈线性增加,而塑性和韧性下降。 碳含量变化对试验钢力学性能的作用基本上是通过回火过程中析出的碳化物的数量和分布的变化 来实现的。
The mechanical property,microstructure,fracture morphology of tensile,Low temperature Charo-py V-notch impact and fracture toughness specimen of four high strength structure steels with different carbon contents were investigated. It is shown that strength and hardness with increase with increasing of carbon content linearly,while plasticity and toughness decreasing. It is the change of the quantity,distribution and mprphology of the carbides formed during tempering that affect the mechanical properties of the steels investigated.
出处
《热处理》
CAS
2003年第2期23-28,共6页
Heat Treatment
