东北大学学报:自然科学版 ›› 2017, Vol. 38 ›› Issue (5): 650-654.DOI: 10.12068/j.issn.1005-3026.2017.05.009

• 材料与冶金 • 上一篇    下一篇

淬火介质对耐磨铸钢组织和性能的影响

张雅静, 方胜民, 王金宝, 张国志   

  1. (东北大学 材料科学与工程学院, 辽宁 沈阳110819)
  • 收稿日期:2016-04-11 修回日期:2016-04-11 出版日期:2017-05-15 发布日期:2017-05-11
  • 通讯作者: 张雅静
  • 作者简介:张雅静(1964-),女,辽宁沈阳人,东北大学副教授; 张国志(1953-),男,辽宁阜新人,东北大学教授.
  • 基金资助:

    军工“十二五”预研项目(2011CY01YY01 ); 辽宁省科学技术基金资助项目(201403798); 沈阳市科学技术基金资助项目(F14-231-1-03).

Effect of Quenching Medium on Microstructure and Properties of Wear-Resistant Casting Steel

ZHANG Ya-jing, FANG Sheng-min, WANG Jin-bao, ZHANG Guo-zhi   

  1. School of Materials Science & Engineering,Northeastern University,Shenyang 110819,China.
  • Received:2016-04-11 Revised:2016-04-11 Online:2017-05-15 Published:2017-05-11
  • Contact: ZHANG Ya-jing
  • About author:-
  • Supported by:

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摘要:

分别研究了以水和机油作为淬火介质的42CrMo钢和双相耐磨钢淬火+回火后的显微组织和性能.确定了双相耐磨钢和42CrMo钢的最佳热处理工艺及性能.结果表明:双相耐磨钢经水淬和油淬回火后的显微组织均为板条马氏体+针状贝氏体+碳化物;42CrMo钢经水淬和油淬回火后的显微组织分别为回火马氏体+残余奥氏体和回火马氏体+铁素体+贝氏体.经过480h的低应力磨料磨损实验发现,水淬+280℃回火处理的42CrMo钢耐磨性能最好,其相对耐磨性可达高锰钢的1.558倍.

关键词: 双相耐磨钢, 42CrMo钢, 淬火介质, 热处理, 组织和性能, 磨料磨损

Abstract:

Microstructures and properties of 42CrMo steel and dual-phase wear-resistant steel after a quenching and tempering treatment were investigated, where water and quenching oil were used as quenching medium, respectively. The results show that both microstructures of the water-quenched+tempered and oil-quenched+tempered dual-phase wear-resistant steels are lath martensite, needle-like bainite and carbide. The microstructures of the water-quenched+tempered and oil-quenched+tempered 42CrMo steels are tempered martensite and retained austenite, and tempered martensite, ferrite and bainite, respectively. The optimum heat treatment and properties of 42CrMo steel and dual-phase wear-resistant steel can be obtained after the comparison of their microstructures and properties. As a result, the wear-resistant property of 42CrMo steel after water-quenching and tempering at 280℃ treatment is the best one, which is 1.558 times higher than that of a high manganese steel in a 480h low-stress abrasive wear experiment.

Key words: dual-phase wear-resistant steel, 42CrMo steel, quenching medium, heat treatment, microstructure and property, abrasive wear

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