不同形态和间隔非光滑表面模具钢的磨损性能  

Wear Behavior of Die Steel with Non-smooth Surface in Different Shape and Distance

作　　者：陈莉[1] 周宏[2] 赵宇[1] 任露泉[3] 

机构地区：[1]长春工业大学材料科学与工程学院,长春130012 [2]吉林大学教育部汽车材料重点实验室,长春130025 [3]吉林大学国家教育部地面机械仿生技术重点实验室,长春130025

出　　处：《机械工程学报》2008年第3期173-176,共4页Journal of Mechanical Engineering

基　　金：国家高技术研究发展计划资助项目(863计划，2002AA331180)。

摘　　要：为提高模具的磨损性能和使用寿命,模仿生物体表非光滑现象,利用激光在4Cr3Mo2NivNb模具钢表面分别加工出具有各种形态和分布间隔的非光滑单元体,对比研究非光滑表面试样和光滑表面试样的磨料磨损性能。结果表明,各种非光滑表面试样耐磨性均优于光滑表面试样:非光滑单元体的形态和分布间隔决定单元体的面积比和硬度.是决定非光滑试样磨损性能的直接因素。非光滑表面试样磨损时,硬度较高的部位支承载荷,防止磨料刺入基体材料,阻碍磨损进程:硬度较低的部位吸收能量,将磨料对非光滑表面的犁削变为滚动,有效减轻磨料对非光滑表面材料的磨损程度.耐磨性能得到提高。Imitating the non-smooth theory of animal biont surface, various non-smooth units in different shape and distributing distance were processed on the 4Cr3Mo2NiVNb die steel by laser to improve the wear-resistance and life-span of die. The grinding abrasion wearability of various specimens with non-smooth surfaces and specimen with smooth surface was measured. The results show that the wear-resistances of specimens with non-smooth surfaces are all better than those of the specimen with smooth surface. The shape and distributing distance of non-smooth unit are obvious factors influencing the wear-resistance of non-smooth specimens becasuse they effect the area ratio and the hardness of non-smooth unit. The non-smooth unit with higher hardness can underprop load, prevent abrasive particles from penetrating into the matrix material and block the wear progress during wear process. The part with lower hardness can absorb energy and make the ploughing and paring of abrasive particle to the non-smooth surface change to roll. Thus the wearing degree of non-smooth material decreases and the wear-resistance is improved.

关 键 词：模具钢 非光滑 激光处理 磨料磨损 

分 类 号：TG115.58[金属学及工艺—物理冶金]