高性价比耐磨复合板的制备工艺与性能研究  

Study on Preparation Technology and Properties of High Cost Performance Wear Resistant Composite Plate

作　　者：武守辉 高增[2] 陈宁波 WU Shouhui;GAO Zeng;CHEN Ningbo(Huanghe Jiaotong University,Jiaozuo 454000,China;School of Materials Science and Engineering,Henan Polytechnic University,Jiaozuo 454000,China)

机构地区：[1]黄河交通学院,河南焦作454000 [2]河南理工大学材料科学与工程学院,河南焦作454000

出　　处：《热加工工艺》2022年第23期152-156,共5页Hot Working Technology

摘　　要：从实用性角度出发,采用最低成本的、最简单的氧-乙炔火焰钎焊方法,以φ2.5 mm的BCu54Zn铜基钎料作为中间层,完成HT250和Q235异种金属的焊接试验,获得了具有较高冲击韧性和硬度的金属复合板,并进行了试样热处理前后的显微硬度、显微组织、冲击韧性等检测。结果表明:对灰铸铁待焊接表面进行焊前去碳处理,可避免由于灰铸铁含碳量高而导致钎焊焊接接头不牢固的缺陷;对表面进行3次去碳处理后,焊缝和HT250板材的结合性比较好,钎料铺展平顺均匀,并且冲击韧性较高,为57.4 J/cm^(2),焊件在淬火热处理后表面硬度最高,可达到418.2 HV。From the view of practical point, the welding tests of HT250 and Q235 dissimilar metals were carried out by adopting the lowest cost, simplest oxygen-acetylene flame brazing welding method with φ2.5 mm BCu54Zn copper-base brazing alloy as the intermediate layer, and the metal composite plate with high impact toughness and hardness was obtained. The microhardness, metallographic microstructure and impact toughness of the metal composite plate before and after the heat treatment were tested. The results show that the pre-weld carbon removal treatment of the gray cast iron welding surface can avoid insufficient bonding defect of the brazed joint caused by the high carbon content of gray cast iron. After three times of decarburization treatment on the surface, the bonding between the weld seam and the plate is better, the brazing material spreads smoothly and evenly, and the impact toughness is higher, which is 57.4 J/cm^(2). The surface hardness of the weldment after quenching treatment is the highest, which can reach up to 418.2 HV.

关 键 词：耐磨复合板 灰铸铁 氧-乙炔火焰钎焊 去碳处理 

分 类 号：TG454[金属学及工艺—焊接]