Journal of Northeastern University:Natural Science ›› 2017, Vol. 38 ›› Issue (5): 650-654.DOI: 10.12068/j.issn.1005-3026.2017.05.009

• Materials & Metallurgy • Previous Articles     Next Articles

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
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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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