等离子冶金复合材料截齿齿体强韧化热处理组织与性能研究  

Study on the Structure and Properties of the Plasma Metallurgical Composite Cutting Picks Obtained by the Technique of Toughening Heat Treatment

作　　者：任勇强[1] 李惠琪[1] 李敏[1] 孙玉宗[1] 冯婷[1] 陈翔[1] 张阿莉[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

出　　处：《新技术新工艺》2009年第3期109-112,共4页New Technology & New Process

摘　　要：等离子冶金复合材料采煤机截齿的齿体材料由35CrMnSiA改为20CrMnTi,直接利用钎焊硬质合金头之后的高温余热对截齿头部以下的齿身部位碱液淬火且不回火,获得了一定深度的低碳板条状马氏体组织,从而使截齿整体上具备了优良的综合力学性能,简化了生产工艺,降低了生产成本。作者研究还发现在截齿头部等离子冶金合金层与钎焊缝之间存在软带,该软带的存在导致合金层磨损之后的加速磨损,以及齿头硬质合金径向应力挤压齿库使空隙扩大导致硬质合金刀头过早脱落,针对上述问题提出了相应的改进方向。Material of the plasma metallurgical composite cutting picks is changed from 35CrMnSiA to 20CrMnTi. Making use of the high-temperature remaining heat obtained by the process of brazing to quench the cutting pick＇s body below its head and not tempering, which can obtain low-carbon panels strip martensite from the surface of the pick＇s body to a certain depth and consequently lead to an overall good integrated mechanical properties of it, thus the process can be simplified, the cost of the cutting picks can be reduced. This study also finds that a soft zone is existed between the plasma metallurgical alloy layer and the weld of brazing, which can lead to the bottom material＇s accelerated abrasion and the carbide segment＇s accelerated fallen off which is also caused by the action of the high-frequency radial squeeze pressure. In the paper, the corresponding ameliorate direction of this kind of problem is referred.

关 键 词：截齿 热处理 低碳马氏体 复合材料 

分 类 号：TG156[金属学及工艺—热处理]