回火温度对高强弹簧钢微观组织和冲击性能的影响

夏博, 王斌, 张鹏, 李小武, 张哲峰

Effect of Tempering Temperature on Microstructure and Impact Properties of Two High-strength Leaf Spring Steels

XIA Bo, WANG Bin, ZHANG Peng, LI Xiaowu, ZHANG Zhefeng

图9 250℃回火态50CrMnMoVNb钢的冲击断口韧窝、解理面和组织中的带状偏析的SEM形貌和EDS结果

Fig.9 SEM morphologies and the EDS results of the dimples, cleavage planes at the impact fracture and the segregation bandings of 50CrMnMoVNb steel tempered at 250℃ (a) impact fracture morphology; (b) microstructures; (c) EDS element analysis results of cleavage surface and dimple; (d) EDS element analysis results of the banded segregation and matrix