Sliding wear of electro-carburized mild steel with different microstructures

IF 1.6 Q4 MATERIALS SCIENCE, COATINGS & FILMS

Tribology - Materials, Surfaces & Interfaces Pub Date : 2020-11-08 DOI:10.1080/17515831.2020.1838099

J. Ling, W. Liew, N. J. Siambun, J. Dayou, Y. Lim, Zhong‐Tao Jiang

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引用次数: 4

Abstract

ABSTRACT The tribological behaviour of carburized steel with different microstructures, produced by varying the carburization time was investigated. Increasing the carburization time from 1 h to 3 h resulted in higher hardness and greater martensite content, which had a stronger tendency to form a better anti-wear oxide. In turn, these improved properties enhanced the adhesive wear resistance and delayed the occurrence of fracture. Longer carburization also resulted in the formation of expanded martensite and shallower grain boundaries with fewer precipitates, which further enhanced the fracture resistance of the steel. Larger scale fracture occurring on steel carburized for 1 h resulted in cracked WC grains, the formation of more undermined WC grains and cavities (due to the removal of WC grains) and severe grooving on the cemented carbide counterbody. In conclusion, this carburization process was effective in enhancing the wear resistance of mild steel which subsequently reduced the wear of the cemented carbide counterbody. GRAPHICAL ABSTRACT

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不同组织电渗碳低碳钢的滑动磨损

研究了不同渗碳时间对不同组织渗碳钢的摩擦学性能的影响。渗碳时间由1 h延长至3 h，合金硬度提高，马氏体含量增加，形成抗磨损氧化物的倾向增强。反过来，这些改进的性能提高了粘合耐磨性，延迟了断裂的发生。长时间的渗碳还导致扩展马氏体的形成，晶界变浅，析出物减少，进一步提高了钢的抗断裂性能。碳钢渗碳1 h后出现较大的断口，导致WC晶粒开裂，WC晶粒和空洞的破坏程度增加(由于WC晶粒的去除)，硬质合金counterbody上出现严重的凹槽。综上所述，该渗碳过程可以有效地提高低碳钢的耐磨性，从而降低硬质合金counterbody的磨损。图形抽象

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来源期刊

Tribology - Materials, Surfaces & Interfaces MATERIALS SCIENCE, COATINGS & FILMS-

CiteScore

2.80

自引率

0.00%

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