用超细CBN磨料磨削超耐热合金  

GRINDING OF SUPERALLOYS WITH ULTRAFINE-CRYSTALLINE CUBIC BORON NITRIDE ABRASIVES

作　　者：YoshioIchida RyuuosukeSato YoshitakaMorimoto Sunarto 

机构地区：[1]日本宇都宫大学机械系统工程系

出　　处：《金刚石与磨料磨具工程》2004年第5期31-36,共6页Diamond & Abrasives Engineering

摘　　要：本文描述了用新开发的超细多晶CBN磨料成型缓进给磨削镍基超耐热合金的磨削特点.用新型聚晶CBN(CBN-U)磨粒和一种有代表性的传统单晶CBN(CBN-B1)磨粒以缓进给方法一次在平面上磨出一个矩型槽进行了试验.用CBN-U磨料与用CBN-B1相比,磨削力降低了20～30%.用CBN-U磨料进行磨削时,径向和轮廓磨损都较小,磨削比要比CBN-B1磨粒高约4倍.CBN-U磨料在磨削过程中的微破碎尺寸比CBN-B1磨料小.用CBN-U比用CBN-B1砂轮磨损率低而寿命长.This paper describes the grinding characteristics of a newly developed ultrafine-ploycrystalline CBN abrasive grit in creep feed profile grinding of Nickel-based superalloys. Experiments for producing a rectangular-shaped groove on a flat surface in one pass by creep feed grinding have been carried out using the new polycrystalline CBN(CBN-U)grit and a representative conventional monocrystalline CBN (CBN-B1) grit. The grinding forces in grinding with CBN-U grits are reduced by 20～30% compared with CBN-B1 grits. When grinding with CBN-U grits, both radial wear and profile wear are less, and hence the grinding ratio is around 4 times higher than that with CBN-B1 grits. The size of grit fracture during the grinding process with CBN-U grits is smaller than that with CBN-B1 grits. It gives lower wheel wear rate and longer wheel life in grinding with CBN-U than with CBN-B1.

关 键 词：缓进给成型磨削 超细晶体CBN 镍基超耐热合金 砂轮磨损 磨削力 

分 类 号：TG58[金属学及工艺—金属切削加工及机床]