完全退火态40Cr钢ECAP加工后的拉伸性能
Tensile Properties of Fully Annealed 40Cr Steel Processed by Equal-channel Angular Pressing
吴桂潮, 许晓静, 王 彬, 罗 勇
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作者单位：江苏大学 先进成形研究所, 江苏 镇江 212013
中文关键字：钢； ECAP加工； 微观组织； 力学性能
英文关键字：steel; ECAP; mechanical properties; microstructure
中文摘要：对经完全退火处理的40Cr钢在室温下实施了等效应变约为0.5的等通道转角挤压(ECAP)，发现钢中铁素体晶粒高效细化(从10～50 μm到1 μm)，珠光体组织亦发生明显的剪切变形。结果表明，经室温ECAP加工，铁素体+珠光体组织的中碳钢材料的屈服极限、抗拉强度大幅提升，塑性降低但仍保持在很高的水平。
英文摘要：A fully annealed 40Cr steel was processed by equal-channel angular press at room temperature, with an imposed equivalent strain about 0.5. The grain size of ferrite was refined(from 10～50 mm to 1mm). There was shear deformation in pearlite microstructure. The results demonstrate that the yield strength and tensile strength of 40Cr steel with ferrite-pearlite improve after ECAP. The ECAP steel has a high level of tensile ductility.