1Cr18Ni9Ti不锈钢深冷处理后的钻削加工试验研究

Experiment of Drilling 1Cr18Ni9Ti Stainless Steel after Cryogenic Treatment

经深冷处理后的奥氏体不锈钢1Cr18Ni9Ti属于较难加工材料,本文结合该型号产品的加工需求,以在产品零件上钻削直径10mm的孔作为研究对象。为了获得理想的切屑形状,改善排屑性能,选用合理的刀具及延长刀具寿命,采用硬质合金钻头和含钴白钢钻头加工材料进行对比试验。研究表明:含钴白钢钻头钻削1Cr18Ni9Ti不锈钢的切削性能优于ITF硬质合金钻头,由此可得钻孔的合理工艺方案:先用中心钻钻导向孔,再预钻,最后钻孔;在转速600r/min,进给速度50mm/min时啄钻,每次深度3mm,刀具可钻80个合格孔,并可获得良好的切屑形状(螺卷屑)和断屑性能。

The austenitic stainless steel after cryogenic treatment is difficult to machine.In this paper,combined with the machining requirements of products,the test of drilling 10mm diameter hole on product parts is studied.In order to obtain the ideal chip shape,improve chip performance,select reasonable tool and prolong tool life,the carbide drill and cobalt-containing white steel drill are used to machine the product,and the comparative experiment is carried out.The research shows that the cutting performance of cobalt-containing white steel tool is superior to the ITF cemented carbide drill in the drilling 1Cr18Ni9Ti,and a reasonable process program for the drilling is obtained:the center drill drills the guide hole,then pre-drills,and finally drills.When the drilling rate is 600r/min,feed speed is 50mm/min,drilling depth is 3mm,the tool can drill 80 qualified holes,and good chip shape(screw chip)and chip breaking performance can be obtained.