The Effect of Heating and Cooling Process During Quenching treatment on Microstructures and Properties of Wear-Resistant Steel NM450

Quenching is a conventional production process of wear-resistant steel, which has a decisive effect on the properties of wear-resistant steel. In this paper, the effects of quenching treatment on microstructures and mechanical properties of NM450 wear-resistant steel were investigated by optical mic...

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Bibliographic Details
Published in:Journal of physics. Conference series 2023-03, Vol.2459 (1), p.12037
Main Authors: Ji, WenBo, Lin, TianZi, Zuo, YuJian, Zhang, Tao, Tian, HongXin, Wang, Yong, Wang, YingShuo
Format: Article
Language:English
Subjects:
Air cooling
Direct quenching
Grain Boundary Segregation
Grain size
Heating
Martensite
Mechanical properties
Microstructure
Optical microscopy
Optical properties
Physics
Toughness
Wear resistance
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Summary:Quenching is a conventional production process of wear-resistant steel, which has a decisive effect on the properties of wear-resistant steel. In this paper, the effects of quenching treatment on microstructures and mechanical properties of NM450 wear-resistant steel were investigated by optical microscopy and scanning electric microscopy. The results show that during the process of heating temperature of 880 °C and air cooling to 850 °C before quenching, the ductility and toughness of NM450 were improved significantly, whose comprehensive properties are better than 880 °C or 850 °C direct quenching steel. With the proportion of ferrite increasing, the strength of NM450 decreases, but the toughness doesn`t increase as influenced by grain size and grain boundary segregation. The martensite of intercritical quenching NM450 appears a shape massive, not lath.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/2459/1/012037