Cr5钢支承辊激光熔凝强化

屈岳波; 赵琳; 张瑞华; 田志凌

doi:10.7512/j.issn.1001-2303.2021.08.10

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专辑

Cr5钢支承辊激光熔凝强化
Research on fi ber laser remelting of Cr5 series back-up roll
2021年51卷第8期页码：88-92
纸质出版：2021
DOI： 10.7512/j.issn.1001-2303.2021.08.10
稿件说明：

移动端阅览

屈岳波, 赵琳, 张瑞华, 等. Cr5钢支承辊激光熔凝强化[J]. 电焊机, 2021,51(8):88-92. DOI： 10.7512/j.issn.1001-2303.2021.08.10.

QU Yuebo, ZHAO Lin, ZHANG Ruihua, et al. Research on fi ber laser remelting of Cr5 series back-up roll[J]. Eletric Welding Machine2021, 51(8): 88-92. DOI： 10.7512/j.issn.1001-2303.2021.08.10.

摘要

采用光纤激光对Cr5钢支承辊表面进行激光熔凝强化处理

通过组织、显微硬度和耐磨性能分析

研究激光功率和扫描速度对单道熔凝层

以及激光功率和扫描间距对多道熔凝层的影响规律。结果表明

激光熔凝处理显著改善了Cr5钢支承辊的表面性能

单道熔凝层显微硬度可达800HV;多道熔凝的后道激光处理对前道熔凝层存在回火作用

但熔凝层仍具有良好的热稳定性

熔凝层平均硬度约为600～700HV

熔凝试样的磨损量比未经处理的基体减小约10倍

熔凝层耐磨性能明显提升。在本实验条件下

激光功率1.4 kW、扫描速度0.48 m/min、扫描间距2.2 mm时

可较好地兼顾生产效率及Cr5钢激光熔凝层的耐磨性能。

Abstract

Cr5 series back-up roll was remelted by fiber laser in this study. Through the analysis of structure

micro-hardness and wear resistance

the influence of laser power and scanning speed on single-pass remelted layer

as well as the influence of laser power and scanning distance on multi-pass remelted layer were studied. The result indicates that laser remelting can improve the surface performance greatly

the microhardness reaches 800 HV for single pass processing. The remelted layer has been softened by the later laser pass in the multi-passes processing. But it has good thermal stability

the average microhardness can reach about 600～700 HV

the wear resistance increases about 10 times after the fiber laser remelted. Under this condition of experiment

when the laser power is 1.4 k W

scanning speeding is 0.48 mm/min

scanning interval is 2.2 mm

it has a relatively good production efficiency and wear-resisting performance.