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·276· 北京科技大学学报 1998年第3期 3 结论 ()淬火温度的制定要在保证淬火后形成淬火马氏体的同时,其回火组织的综合性能符 合使用要求,本实验表明淬火温度过高,材料的力学性能则从一较高值开始下降 (2)钢板由低温到高温的回火过程中组织变化规律是:回火马氏体一回火屈氏体一回火 索氏体,当组织为回火索氏体时,材料的强韧性才可能满足使用要求, (3)在250~400℃的回火温度范围内,有回火马氏体脆性存在区间.在制定调质工艺时, 需避开这一回火温度区间.而超过580℃的回火温度以后,综合力学性能指标则开始下降.回 火温度的选择根据实验结果可取在550~580℃这一范围 (4)所选化学成分的590MPa级钢板的合适调质工艺应为:淬火温度910~920℃,回火温 度550~580℃. 参考文献 1宋维锡,金属学,北京:冶金工业出版社,1989 2劳斯特克·威廉.金相组织解说.刘以宽,魏馥铭译,上海:上海科学技术出版社,1984 3科恩·M.钢的微合金化及控制轧制.李述创,向德渊译,北京:冶金工业出版社,1984 Quenching-tempering Process Effect on Microstructure and Properties of 590 MPa High Strength Thick Plate Liu Xuetong Wang Youming Xu Jiariguo Xue Guijun? 1)Material Science and Engineering School,UST Beijing,Beijing 100083,China 2)Technology Center,An'shan Iron and Steel Co,An'Shan 114001 ABSTRACT A new quenching-tempering technology system is gotten,in which the quenching temperature is about 910~920c and the tempering temperature is about 550~ 580C.With using this technology,the mechanical properties of the 590 MPa high strength thick plate are better satisfaction for the using demand.The new technology system is available for the steel plate of different composition. KEY WORDS quenching tempering;high strength steel plate;steel for engineering machinery
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