Microstructure and Properties of Nickel-based Alloy Powder Laser Cladding on 45 Steel Substrate

He Lijia; Zhao Xiaojie; Wang Han; Gao Rui; Zhao Jiahong

doi:10.15980/j.tzzz.2015.09.004

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Microstructure and Properties of Nickel-based Alloy Powder Laser Cladding on 45 Steel Substrate
Vol. 35, Issue 9, Pages: 909-912(2015)
Published： 2015 ，
DOI： 10.15980/j.tzzz.2015.09.004

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[1]何力佳,赵晓杰,王函,高睿,赵佳红.45号钢基体光纤激光熔覆镍基合金的组织与性能[J].特种铸造及有色合金,2015,35(09):909-912.

He Lijia, Zhao Xiaojie, Wang Han, et al. Microstructure and Properties of Nickel-based Alloy Powder Laser Cladding on 45 Steel Substrate. [J]. Special Casting & Nonferrous Alloys 35(9):909-912(2015)
[1]何力佳,赵晓杰,王函,高睿,赵佳红.45号钢基体光纤激光熔覆镍基合金的组织与性能[J].特种铸造及有色合金,2015,35(09):909-912. DOI： 10.15980/j.tzzz.2015.09.004.

He Lijia, Zhao Xiaojie, Wang Han, et al. Microstructure and Properties of Nickel-based Alloy Powder Laser Cladding on 45 Steel Substrate. [J]. Special Casting & Nonferrous Alloys 35(9):909-912(2015) DOI： 10.15980/j.tzzz.2015.09.004.

摘要

利用光纤激光器在45号钢表面熔覆镍基合金粉末

通过金相显微镜、显微硬度计和X射线衍射仪等分析测试手段

对激光熔覆镍基合金粉末45号钢熔覆层组织和性能进行分析研究。结果表明

在其他工艺参数一定的条件下

随着激光功率的增加

熔覆层宽度、高度和厚度均增加

熔覆层的双相组织粗大且分布稀疏不均匀

结合面趋于不规则。激光熔覆层的主要物相由λ-（Fe

Ni）、Cr23C6、Cr7C3、WC和FeMo组成。随着扫描速度的增加

熔覆层的双相组织细化且分布均匀

结合面趋于平直。45号钢经激光熔覆镍基合金粉末处理后

硬度（HV0.1）最大值为550

出现在距结合面0.5mm的熔覆层处。

Abstract

Nickel-based alloy powder was cladded by fiber laser cladding on the surface of 45 steel samples in order to understand effects of laser cladding on microstructure and properties of the 45 steel samples by using optical metallurgical microscope

micro-hardness tester and X-ray diffractometer.The results show that the width

height and thickness of cladding layer are increased with the increase of laser power at fixed other parameters.Meanwhile

the microstructure of cladding layer is coarse and the interface between cladding layer and substrate exhibits irregular.The main phases are composed ofλ-（Fe

Ni）、Cr23C6、Cr7C3、WC and FeMo.The cell microstructure is refined and distributed uniformly with tending to straight interface with the increase of cladding speed.The maximum microhardness reaches 550（HV0.1）

which appears at the distance of 0.5mm from surface to the bonding zone.