Effect of carbon content on wear resistance of metal clothing made of Nb microalloyed high carbon steel

doi:10.13251/j.issn.0254-6051.2021.12.011

Abstract

Abstract: Based on the principle of microalloying, three types of high carbon steels containing 0.8%-1.0% C and 0.03%-0.04%Nb were designed. The results show that the increase of carbon content can completely eliminate the network cementite and make more carbon dissolve in austenite during heat treatment, so as to obtain higher quenching hardness. The comparison of quenching microstructure of steels with different carbon content shows that when the carbon content is 0.90%, the martensitic matrix can obtain the highest hardness while keep the extreme fine grain size. The card clothing made of this type of steel can reach an average hardness of 841 HV0.2 with grain size grade of 13.5. The wear resistance increases by about 30% compared with standard high-end steel 80WV applied to card clothing through quick wear tests and online tests in real carding machines.

Key words: Nb, micro-alloying technology, high carbon steel, metallic card clothing

CLC Number:

TG135⁺.6

Gu Weihua, Zhuo Chengzhi, Lu Zhong, Gao Li, Zhang Yongqing, Yong Qilong. Effect of carbon content on wear resistance of metal clothing made of Nb microalloyed high carbon steel[J]. Heat Treatment of Metals, 2021, 46(12): 72-75.

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