摘要
利用药芯焊丝对已磨损的K360耐磨钢板进行CO2气体保护堆焊修复,在焊前进行不同温度的预热处理,并对不同预热处理的堆焊层进行了显微组织、XRD、硬度、冲击韧度及抗磨料磨损性能试验。结果表明,不同预热温度处理的堆焊层的组织均为马氏体+碳化物+少量残余奥氏体;经150,200℃预热处理,堆焊层硬度较高,韧性较高,耐磨性也较好,耐磨性分别可达到母材的1.583倍和1.494倍;预热温度250℃时,堆焊层的韧性较低,耐磨性也出现大幅下降,仅为母材耐磨性的1.148倍。
This authors restored wear resistant steel K360 by using flux-cored wire hardfacing welding with CO2 as shielding gas, and base metal was preheated at different temperature before welding. Then, we carried out the test of microstructure,X-ray diffraction analysis for measuring hardness, impact toughness and wear resistance. The results show that the microstructure of different temperature preheating hardfacing layer is martensite, carbide, and a small amount of residual austenite. When the pre-heating temperature is about 150 ℃ and 200 ℃, the hardfacing layer has high hardness,impact toughness, wear resistance, and its wear resistance is up to 1. 583 times and 1. 494 times respec- tively. When the pre-heating temperature is about 250 ℃, the hardfacing layer is in lower impact toughness, mean- while, the wear resistance is degressive compared with that at 150 ℃ and 200 ℃. Compared to based metal, its wear resistance is only 1. 148 times of that.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2012年第8期1412-1417,共6页
Journal of China Coal Society
