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我厂在检修热处理盐浴炉的电极套管时发现,用普通碳素钢制作的电极套管腐蚀严重,决定改用不锈钢材质的电极套管。于是,选用了直径为32mm,长度为600mm,材质为Icr18Ni9Ti的棒料,要在上面加工出直径为26mm,深度为579mm的深孔。由于Icr18Ni9Ti材料导热性差且表面加工硬化严重,钻孔加工时,冷却液又只能在离孔口70mm～80mm深的地方起作用,第一次加工,钻了一夭,损坏了三把新的麻花钻,
I plant maintenance heat treatment salt bath furnace electrode casing found that ordinary carbon steel produced by the electrode casing corrosion serious, decided to use stainless steel electrode casing. Therefore, the selection of a diameter of 32mm, length of 600mm, made of Icr18Ni9Ti bar material, to be processed in the above diameter of 26mm, a depth of 579mm deep hole. Due to the poor thermal conductivity of Icr18Ni9Ti material and severe surface hardening, drilling process, the cooling fluid can only be located 70mm ~ 80mm away from the orifice where the role of the first processing, a drill, damaged three new twist drill,