Influence of scanning strategies on laser-cladded AISI 420 steel

IF 2.4 4区材料科学 Q3 MATERIALS SCIENCE, COATINGS & FILMS Surface Engineering Pub Date : 2022-12-02 DOI:10.1080/02670844.2023.2174656

Jianwen Zhang, Hongmei Zhu, C. Qiu, Longzhang Shen

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Abstract

ABSTRACT In this study, the influence of different laser scanning strategies on substrate deformation, microstructure and properties of laser-cladded thin-walled 420 martensitic stainless steel (MSS) plate have been carefully investigated. The continuous offset-out scanning strategy (COSS) and continuous raster scanning strategy (CRSS) was compared with the subarea offset-out scanning strategies (SOSS) and subarea raster scanning strategy (SRSS) with different sequences. The results show that the minimum and maximum macroscopic deformation was generated using COSS and CRSS, respectively. The temperature distribution with characteristic of quasi-symmetry was generated by COSS, which can largely suppress the substrate deformation, in marked contrast to a long ellipse symmetry by CRSS. All the laser-cladded 420 MSS layers exhibit lath-martensite microstructure, while some cracks are distributed by using SOSS. The optimal comprehensive performance of the laser-cladded 420 MSS can be obtained using COSS, with smallest outermost deformation of 1.57 mm, superior hardness of 54.9 HRC and wear rate of 0.9626 × 10−5 mm3/N·m.

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扫描策略对激光熔覆aisi420钢的影响

本文研究了不同激光扫描策略对激光熔覆薄壁420马氏体不锈钢(MSS)板基体变形、组织和性能的影响。将连续偏移扫描策略(COSS)和连续光栅扫描策略(CRSS)与不同序列的子区域偏移扫描策略(SOSS)和子区域光栅扫描策略(SRSS)进行了比较。结果表明:采用COSS和CRSS分别产生最小和最大宏观变形;COSS产生了具有准对称特征的温度分布，可以很大程度上抑制衬底变形，与CRSS形成的长椭圆对称形成鲜明对比。激光熔覆的420 MSS层均表现为板条马氏体组织，但存在一定程度的裂纹。激光熔覆420 MSS的综合性能最佳，最外层变形最小为1.57 mm，最高硬度为54.9 HRC，磨损率为0.9626 × 10−5 mm3/N·m。

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来源期刊

Surface Engineering 工程技术-材料科学：膜

CiteScore

5.60

自引率

14.30%

发文量

审稿时长

2.3 months

期刊介绍： Surface Engineering provides a forum for the publication of refereed material on both the theory and practice of this important enabling technology, embracing science, technology and engineering. Coverage includes design, surface modification technologies and process control, and the characterisation and properties of the final system or component, including quality control and non-destructive examination.