Microstructure and Properties of Tempered High Vanadium Semi High Speed Steel Alloy Cladding Layer

被引：0

作者：

Sun, Hang ^{[1
]}

Chen, Wei ^{[2
]}

Luo, Chang ^{[2
]}

Liu, Chang-Sheng ^{[1
]}

机构：

[1] School of Materials Science & Engineering, Northeastern University, Shenyang

[2] Baosteel Roll Technology Co.，Ltd., Changzhou

来源：

Dongbei Daxue Xuebao/Journal of Northeastern University | 2024年 / 45卷 / 05期

关键词：

laser cladding; microstructure; semi high speed steel; tempering; wear resistance;

D O I：

10.12068/j.issn.1005-3026.2024.05.004

中图分类号：

学科分类号：

摘要：

In order to meet the demand for rapid repair of roll surface，laser cladding technology was used to clad the self‑designed and prepared high vanadium semi high speed steel alloy powder on the surface of roll alloy steel. Considering the difference between the structures of forged steel roll and laser cladding layer，in order to stabilize the structure，the cladding layer was tempered with 500 ℃ and 2 h. The results show that the phase composition of the cladding layer is mainly martensite. The surface of the cladding layer is mainly fine equiaxed crystal，and the intragranular martensite is distributed in parallel in needle shape，which is decomposed into ferrite and carbide after tempering. The average hardness of the cross‑section of the cladding layer is 663. 4 HV，1. 8 times that of the substrate. The average friction coefficient of the cladding layer is 0. 708，the wear rate is 6. 142×10-6 mm3·N-1·m-1，the wear performance is 25 times higher than that of the substrate，and the wear morphology is good，in accordance with the wear amount results. © 2024 Northeast University. All rights reserved.

引用

页码：636 / 642

页数：6

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