天天日天天日天天摸,jizzjizz国产精品久久,超碰在线资源网免费观看97

Info

Title:: Microstructure and Mechanical Properties of CuCrZr Prepared by LaserAssisted Cold Spraying

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

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

CLC:

PACS:: TG174.4

DOI:: 10.7502/j.issn.1674-3962.202506009

DocumentCode:

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assisted cold spraying (LACS) parameters on the microstructure and mechanical properties of CuCrZr coatings were investigated. Nitrogen was used as the highpressure 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assisted 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.

亚洲国产aⅴ成人精品无吗,中文字幕999精品,人妻人人妻a乱aa乱,日韩三级aaaaa,亚洲午夜成人精品无码色欲,国产第一页第二页av,老熟女北岛玲888av,99re热这里只有精品18,久久精品中文字幕久久

Microstructure and Mechanical Properties of CuCrZr Prepared by LaserAssisted Cold Spraying(PDF)

MATERIALS CHINA[ISSN:1674-3962/CN:61-1473/TG]

Info

References

Memo

Common functions

Navigate

Tools

Statistics