文章信息/Info

Title:

Microstructure and Mechanical Properties of CuCrZr Prepared by Laser�睞ssisted Cold Spraying

文章編號:

1674-3962(2026)02-0145-10

作者:

胡友芹; 楊冠軍; 雒曉濤; 李長久

西安交通大學(xué) 金屬材料強度全國重點實驗室，陜西 西安 710049

Author(s):

HU Youqin; YANG Guanjun; LUO Xiaotao; LI Changjiu

Key Laboratory for Mechanical Behavior of Materials, Xi’ an Jiaotong University, Xi’ an 710049, China

關(guān)鍵詞:

銅合金; 冷噴涂; 激光輔助冷噴涂; CuCrZr涂層; 結(jié)合強度; 摩擦磨損性能

Keywords:

copper alloy;  cold spraying;  laser-assisted cold spraying;  CuCrZr coating; adhesion strength;  friction and wear properties

分類號:

TG174.4

DOI:

10.7502/j.issn.1674-3962.202506009

文獻標(biāo)志碼:

A

摘要:

針對銅合金零部件服役損傷失效問題，采用冷噴涂（CS）對銅合金受損零部件進行修復(fù)，并加入激光輔助。研究了冷噴涂與激光輔助冷噴涂（LACS）參數(shù)對CuCrZr涂層的顯微組織特性與力學(xué)性能的影響。采用氮氣作為高壓氣源，在3、4 MPa冷噴涂壓力和400、600 ℃溫度以及1、2和3 kW LACS激光功率參數(shù)下制備CuCrZr涂層，通過掃描電鏡、光鏡、3D共聚焦顯微鏡、顯微硬度計、萬能試驗機、摩擦磨損試驗機對涂層顯微組織和力學(xué)性能進行表征。結(jié)果表明，LACS涂層相比于CS涂層表面粗糙度更低、孔隙率略高、顯微硬度相當(dāng)，結(jié)合強度提升243%，耐摩擦磨損性能得到改善。LACS-3 MPa-600 ℃-3 kW涂層表面粗糙度（Sa）為(14.9±1.2) μm，孔隙率為(0.7±0.3)%，顯微硬度為(161±13)HV0��1，結(jié)合強度為(34.0±7.2) MPa，磨損率為(2.8±0.8)×10-4 mm3·N-1·m-1。LACS相較于CS更易制備性能優(yōu)異的CuCrZr修復(fù)涂層，隨激光功率提升，涂層孔隙率降低，結(jié)合強度顯著提高，涂層耐磨損性能提高。CuCrZr涂層結(jié)合機制為機械嵌合+部分冶金結(jié)合；摩擦磨損機制以黏著磨損為主，磨粒磨損為輔。LACS方法制備CuCrZr涂層滿足維修CuCrZr合金性能需求。

Abstract:

To solve the problem of service damage and failure of copper alloy parts, cold spraying (CS) was used to repair damaged copper alloy parts with the addition of laser assistance. The effects of cold spraying and laser�瞐ssisted cold spraying (LACS) parameters on the microstructure and mechanical properties of CuCrZr coatings were investigated. Nitrogen was used as the high�瞤ressure gas source to prepare the CuCrZr coatings under the parameters of cold spraying pressure of 3，4 MPa and temperature of 400,600 ℃, and laser�瞐ssisted cold spraying (LACS) with laser power of 1，2 and 3 kW, and the microstructure and mechanical properties of the coatings were characterized by scanning electron microscopy, light microscopy, 3D confocal microscopy, microhardness tester, universal testing machine and friction and wear tester. The LACS coating has lower surface roughness, slightly higher porosity, comparable microhardness, 243% higher adhesion strength, and improved friction and wear resistance compared to the CS coating. The surface roughness (Sa) of the LACS-3 MPa-600 ℃-3 kW coating is (14.9±1.2) μm, the porosity is (0.7±0.3)%, the microhardness is (161±13)HV0.1, the adhesion strength is (34.0±7.2) MPa, and the wear rate is (2.8±0.8)×10-4 mm3·N-1·m-1. LACS is easier to prepare excellent CuCrZr repair coatings than CS, and with the increase of the laser power, the porosity of the coatings is reduced, the adhesion strength is increased significantly, and the wear resistance of the coatings is improved. The bonding mechanism of CuCrZr coatings is mechanical embedding and partial metallurgical bonding. The friction wear mechanism is mainly adhesive wear, supplemented by abrasive wear. The CuCrZr coatings prepared by the LACS method can meet the requirements of repairing CuCrZr alloys.