摘要
在Q235钢板上,用不同TiO_2含量的高锰钢堆焊药芯焊丝进行堆焊试验。采用扫描电镜、电子探针和X射线衍射仪等对堆焊层的显微组织进行分析,测试熔敷金属的硬度及耐磨性。结果表明:在耐磨堆焊焊丝中添加TiO_2和Al,通过焊接冶金反应原位生成TiAl金属间化合物颗粒,能对堆焊层组织产生细化作用,并能提高堆焊层的硬度和耐磨性。添加0.53%的TiO_2堆焊层熔敷金属具有最优的微观组织及耐磨性能;随着TiO_2的添加,熔敷金属磨损机制由黏着磨损逐渐转变为磨料磨损。
Overlaying experiments were carried out on Q235 steel plate surfaces using high manganese steel flux-cored wire with different TiO2 content. Microstructure of the hardfaced layer were investigated by scanning electron microscopy （ SEM ） , electron microprobe analysis （EPMA） and X-ray diffractometers（XRD）, and the hardness and wear resistance properties of the hardfaced layer were also tested.. The test results show that by adding TiO2 and Al in wear-resistant overlaying welding wire, TiAl intermetallic compound is In situ formed by welding metallurgy reaction which will be able to refine grains in hardfaced layer and improve the hardness and wear resistance properties. When the TiO2 content is 0.53% , the microstructure and wear resistance of the hardfaced layer are the best. With the increase of TiO2 content, the wear mechanism of hardfacing layers transfers from serious adhesive wear to abrasive wear gradually.
作者
牛犇
易耀勇
易江龙
王凯
刘洪喜
Niu Ben Yi Yaoyong Yi Jianglong Wang Kai Liu Hongxi(School of Materials Science and Engineering, Kunming University of Science and Technology, Kunming Yunnan 650500, Chin Key Laboratory of Modern Welding Technology of Guangdong Province, E. O. Paton Chinese-Ukrainian Institute of Welding, Guangdong General Research Institute of Industrial Technology, Guangzhou Guangdong 510650, China)
出处
《金属热处理》
CAS
CSCD
北大核心
2016年第12期52-57,共6页
Heat Treatment of Metals
基金
广州市科学研究专项(201510010101)
广州市国际合作项目(2013J4500072)
广州市科技项目(201508030024)
关键词
高锰钢
堆焊层
TiO_2添加
组织
性能
high manganese steel
hardfaced layer
TiO2 adding
microstructure
mechanical properties
