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40 Cr钢转向节轴部直径对其淬火态组织和硬度的影响

QI Bin,ZHOU Wenhua,FAN Zhijun,YUAN Song, JI Xinwei, JIANG Nengwen,XU Zhong,ZHOU Xiying

Shanghai Metals（2022）

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Abstract
将轴部直径为50和70 mm的40Cr钢转向节加热至860℃保温120 min水淬.检测了不同轴径的转向节淬火后的显微组织和硬度.结果表明:轴径为50 mm的转向节从表面到心部的组织主要为马氏体,而轴径为70 mm的转向节表面为马氏体,芯部为珠光体+少量铁素体.轴径为50 mm的转向节被淬透,从表面至15 mm深处的平均硬度为54 HRC;而轴径为70 mm的转向节未被淬透,从表面至15 mm深处的平均硬度为50 HRC.
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