“堆667”合金是一种良好的耐磨损、耐腐蚀和耐气蚀的堆焊材料,它的化学成分为C—2.5～3.3％,Mn—0.5～1.5％,Si—2.8～4.8％,Cr—25～31％,Ni—2～5％。这种材料常用于制造高炉炉顶大钟、漏斗及各种阀的密封面。“堆667”含金硬度高达HRc48～55,而且堆焊面凸凹不平,所以切削加工是困难的。加之,高炉大钟及漏斗系薄壁零件,其加工又总是在重型立式车床上进行,工艺系统的刚性很差,切削时冲击和振动特别大。普通刀具一般难以承受这样大的切削载荷,往往不是打刀,就是刀具剧烈磨损,更甚 The “Heap 667” alloy is a good wear, corrosion and cavitation resistant surfacing material with a chemical composition of C-2.5-3.3%, Mn-0.5-1.5%, Si-2.8-4.8% , Cr-25-31%, Ni-2-5%. This material is often used in blast furnace roof bell, funnel and various valve sealing surface. “Heap 667” gold hardness up to HRc48 ~ 55, and surfacing bumpy, so cutting is difficult. In addition, blast furnace bell and funnel thin-walled parts, and its processing is always carried out in heavy vertical lathe, the process of rigid system is poor, cutting impact and vibration particularly large. Ordinary tools generally difficult to withstand such a large cutting load, often not a knife, that is, violent wear and tear, and even worse