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本文介绍了用含钴量不同的硬质合金拉削30XLCHA(HRC48～52)钢件内孔时,抗脆强度的计算结果。计算表明,BK10M 和BK10OM 抗脆强度的安全系数较大,耐磨性好。文中所推荐的制造拉刀用硬质合金牌号的选挥方法可大大减少耐用度的试验次数。高强度钢和合金零件的加工是一道重要而繁重的工序。拉削——效率最高的孔加工方法——因刀具耐用度低而不能经常采用。引起拉刀快速磨损的主要原因有:在接触区内被加工工件和刀具材料硬度的不合适比例关系,高合金钢具有粘刀的倾向性,刀齿上运动负荷大以
In this paper, the calculation results of anti-embrittlement strength of 30XLCHA (HRC48 ~ 52) steel bores with different amounts of cobalt carbide are introduced. The calculation shows that the safety factor of BK10M and BK10OM is better than that of BK10OM, and the wear resistance is good. The recommended method of selecting the carbide grades for making broaches greatly reduces the number of durability tests. High-strength steel and alloy parts processing is an important and heavy process. Broaching - The most efficient hole machining method - can not be used often due to the tool’s low durability. The main reason for the rapid wear of the broach is: the improper proportional relationship between the hardness of the workpiece and the tool material being machined in the contact area, the tendency of the high alloy steel to stick the knife, the large load on the tooth