CAJ | 학술논문

研究了一次正火、二次正火和油淬三种热处理工艺对60 CrMnMo轧辊钢组织与性能的影响，并对一次正火、二次正火和油淬后的试样进行560℃、580℃和600℃回火处理。运用金相显微镜、硬度测试机等手段对不同工艺处理后的试样进行组织和性能检验分析。结果表明：不论是否进行回火，油淬后的60 CrMnMo轧辊钢试样硬度高于正火态试样。对于560℃、580℃和600℃回火处理，一次正火和油淬后的试样硬度值呈现下降趋势，而二次正火后的试样是呈现先上升后下降变化趋势。热处理后的60 CrMnMo轧辊钢金相组织各不相同，一次正火后的组织为贝氏体，二次正火后的组织为珠光体和铁素体，油淬后的组织为马氏体和碳化物。
연구료일차정화、이차정화화유쉬삼충열처리공예대60 CrMnMo알곤강조직여성능적영향，병대일차정화、이차정화화유쉬후적시양진행560℃、580℃화600℃회화처리。운용금상현미경、경도측시궤등수단대불동공예처리후적시양진행조직화성능검험분석。결과표명：불론시부진행회화，유쉬후적60 CrMnMo알곤강시양경도고우정화태시양。대우560℃、580℃화600℃회화처리，일차정화화유쉬후적시양경도치정현하강추세，이이차정화후적시양시정현선상승후하강변화추세。열처리후적60 CrMnMo알곤강금상조직각불상동，일차정화후적조직위패씨체，이차정화후적조직위주광체화철소체，유쉬후적조직위마씨체화탄화물。
Effects of a normalizing,secondary normalizing and oil quenching on microstructure and hardness of 60 CrMnMo rolled steel were investigated in the research. Tempering at 560℃,580℃ and 600℃ was considered for good plasticity. The microstructure and hardness of specimens were analyzed by OM and hardness tester. The re-sults showed hardness of oil quenched specimens was higher than that of normalized specimens. For the considered tempering temperature,hardness of a normalized and oil quenched specimens had a tendency to decrease. However, hardness of secondary normalized specimens had a tendency to increase and then decrease. The microstructure of heat treated 60 CrMnMo rolled steel by different processes was diverse. Bainite was found in a normalized specimen. Pearlite and ferrite were detected in secondary normalized specimens. Martensite and carbide were observed in oil quenched specimens.