碳弧熔覆镍基自熔合金熔覆层的组织及性能  

Microstnicture and Performance of Ni-Based Self-Fluxing Alloy by Carbon Arc Cladding

作　　者：孟媛媛[1] 任瑞晨[2] 秦海峰 陶文君[1] 

机构地区：[1]辽宁工程技术大学矿业技术学院,辽宁葫芦岛125100 [2]辽宁工程技术大学矿业学院,辽宁阜新123000 [3]抚顺石化公司腈纶化纤厂,辽宁抚顺113000

出　　处：《材料保护》2016年第7期42-43,74,共3页Materials Protection

摘　　要：目前,有关碳弧熔覆电流对熔覆层表面组织和性能影响的研究较少。为此,将镍基自熔合金粉末预先涂覆在试样表面,利用碳弧热源进行熔覆,通过金相显微镜、硬度计及磨粒磨损试验对熔覆层表面的组织及性能进行了测试。结果表明:熔覆电流对熔覆层组织和性能有较大影响,涂覆层厚度为3 mm、电流为170 A时,熔覆层组织为镍基固溶体加少量共晶物,共晶组织应为镍基固溶体与多种碳化物、硼化物共晶,硬度为47.5 HRC,耐磨性最好。Ni-based self-fluxing alloy powder,which was laid on the sample surface in advance,was used to form a cladding coaling by carbon arc cladding.The microstructure and properties of the cladding coaling were investigated by metallurgical microscope,hardometer and abrasive tester.Results showed that the cladding current was proved to have influence on microstructure and properties of the.cladding coating.When the cladding current was 170 A and the coaling thickness was 3 mm,the structure of the cladding coating was nickel-based solid solution and a liltle eutsctic,and the eutectic organization was formed from the nickel-based solid solution and a variety of carbide and boride.Furthermore,the coating had the best wear resistance with the hardness of 47.5 HRC.

关 键 词：碳弧熔覆 镍基自熔合金 熔覆层 组织 性能 

分 类 号：TG174.44[金属学及工艺—金属表面处理]