硼对等离子熔覆耐磨复合板的组织性能影响  

Effect of boron on microstructure and performance of wear-resisting steel plate prepared by plasma cladding

作　　者：田成海[1] 李惠琪[1,2] 迟静[1] 许慧[1] 陆峰[1] 柴禄[1] 

机构地区：[1]山东科技大学材料科学与工程学院,山东青岛266510 [2]北京科技大学材料系,北京100083

出　　处：《材料热处理学报》2011年第12期138-142,共5页Transactions of Materials and Heat Treatment

基　　金：山东省自然科学基金(2009ZRB01417)

摘　　要：采用等离子表面熔覆技术,在Q235基体钢板上熔覆无硼以及含硼(其它粉末成分不变)的铁基合金涂层。利用光学显微镜(OM)、扫描电镜(SEM)、X射线衍射仪(XRD)、电子探针(EMPA)、显微硬度计对涂层的组织、相组成和显微硬度等进行分析。结果表明,含硼粉末熔覆涂层含有(Fe,Cr)7(C,B)3等硼化物相,含量比无硼粉末涂层的(Fe,Cr)7C3等碳化物相含量明显增多;并且产生了大量的共晶硼化物FeB以及少量的Fe2B,均匀弥散的分布在涂层中;在α-Fe中也有间隙固溶的硼;且随着粉末成分含硼量的增加,(Fe,Cr)7(C,B)3硼化物相含量增多,熔覆涂层的平均和最高显微硬度值也相应增加。Fe-based alloy coatings with and without boron were prepared on Q235 steel by plasma cladding process.Composition,phases and hardness of the coatings were investigated by means of optical microscope,scanning electron microscopy（SEM）,X-ray diffraction（XRD）,electron probe microanalysis（EPMA） and microhardness test.The results show that more amount of boride of（Fe,Cr）7（C,B）3 is observed in the coatings containing B compared with that of carbide in the coating without B,and a large mount of FeB and a small amount of Fe2B disperse uniformly in the coatings containing B.In addition,some B atoms also dissolve in α-Fe as interstitial atoms.Both the content of eutectic（Fe,Cr）7（C,B）3and hardness of the coatings increase with the increase of content of boron in the alloying powders for plasma cladding.

关 键 词：等离子熔覆 晶格畸变 硼化物 共晶组织 

分 类 号：TG174.44[金属学及工艺—金属表面处理]