Effects of plasma spraying process on microstructure and mechanical properties of Cr_(2)AlC/410 composite coatings  

作　　者：Yihu Ma Chaosheng Ma Guozheng Ma Wenbo Yu 

机构地区：[1]Center of Materials Science and Engineering,School of Mechanical and Electronic Control Engineering,Beijing Jiaotong University,Beijing 100044,China [2]National Key Lab for Remanufacturing,Army Academy of Armored Forces,Beijing 100072,China

出　　处：《High-Speed Railway》2024年第2期110-115,共6页高速铁路（英文）

基　　金：supported by the Beijing Natural Science Foundation(Grant No.3232011);the Joint Fund of the Ministry of Education for Equipment Pre-research(Grant No.8091B02022306);the National Natural Science Foundation of China(Grant No.52175284).

摘　　要：To investigate the influences of Cr_(2)AlC mass fraction and supersonic plasma spraying process on the microstructure and mechanical properties of Cr_(2)AlC reinforced 410 stainless steel composite coatings,the coatings containing different mass fractions of Cr_(2)AlC were prepared and investigated.The composite coating exhibited low porosity and high adhesion strength.The addition of Cr_(2)AlC significantly enhanced the hardness of the composite coatings through particle strengthening.However,when the mass fraction of Cr_(2)AlC was 20%,the aggregation of Cr_(2)AlC resulted in a strong decrease in the coating preparation efficiency,as well as a decline in adhesion strength.In the supersonic plasma spraying process,the Ar flow rate mainly influenced the flight velocity of the particles,while the H_(2) flow rate and the current mainly affected the temperature of the plasma torch.Consequently,all of them influenced the melting degree of particles and the quality of the coating.The lowest porosity and the highest hardness and adhesion strength could be obtained when the Ar flow rate is 125 L/min,the H_(2) flow rate is 25 L/min,and the current is 385 A.

关 键 词：MAX phase Plasma spray PARAMETER Coating 

分 类 号：TQ63[化学工程—精细化工]