Surface Integrity Assessment of Laser Treated and Subsequently Coated Cemented Carbides
Cemented carbides,referred to as hardmetals,are forefront engineering materials widely implemented in industry for chip-removal cutting tools and supporting parts.As a newly developed technology for surface modification with high precision,the application of short pulse laser may extend the utilization of cemented carbides.However,surface integrity of laser-treated materials may be affected during the ablation phenomena.These potential changes may also be relevant for subsequent coating deposition,a surface modification stage usually invoked in many cutting and forming tools.It is the objective of this work to study the influence of a previous laser treatment on the surface integrity of a cemented carbide grade,finally coated by a ceramic layer introduced by physical vapor deposition.In doing so,a nanosecond laser has been employed.Surface integrity is assessed in terms of roughness,hardness,and microstructural changes induced at the subsurface level.It is found that pulse laser can effectively remove the target material,resulting roughness being similar to that attained by abrasive grinding.Although some subsurface damage is observed,it is limited to a very shallow layer,this being thoroughly eliminated during sandblasting implemented before coating deposition.Relative hardness increase is larger for laser treated substrate than for just polished one,reason behind it being speculated to come from the sandblasting stage used for removing damaged layer.
Cemented Carbides Laser Coating Surface Integrity Roughness Hardness
Fang Shiqi García Marro Fernando Salan Nuria Cruz Marlon Colominas Carles B(a)hre Dirk Llanes Luis
CIEFMA-Dept.Materials Science and Engineering,Universitat Politècnica de Catalunya,EEBE-Campus Diago CIEFMA-Dept.Materials Science and Engineering,Universitat Politècnica de Catalunya,EEBE-Campus Diago FLUBETECH,S.L.,Barcelona,08211,Spain Institute of Production Engineering,Saarland University,Saarbrücken,66123,Germany
国际会议
北京
英文
1326-1330
2018-09-16（万方平台首次上网日期，不代表论文的发表时间）