论文部分内容阅读
我厂生产的高速钢(W6Mo5Cr4V2)小钻头一度出现脆断现象。脆断是在加工或使用过程中承受较小弯矩后便产生,为此我们进行了失效原因分析。这种麻花钻的生产工艺为:高频加热轧制成型—磨外圆—盐浴炉加热淬火—酸洗—氮化等主要加工序。针对以上加工工序中可能造成脆性的环节,进行了检查,结果如下: 一分析内容 1 金相检查取10支脆断钻头作金相分析,检查结果如下: 晶拉度:11.5～11号)。合格范围10.5～11.5号); 回火程度:充分(合格范围一般～充分); 氮化层深:0.17～0.20mm(合格范周0.13～0.30mm);
I plant the production of high-speed steel (W6Mo5Cr4V2) small brittle broken once the phenomenon. Brittle fracture is generated in the process or use to withstand smaller bending moments, for which we conducted a failure analysis. This twist drill production process: high frequency heating rolling molding - grinding cylindrical - salt bath furnace quenching - pickling - nitriding and other major processing. In view of the above process may cause brittle parts of the inspection, the results are as follows: An analysis of the contents of 1 Metallographic examination Take 10 Brittle broken bits for metallographic analysis, the test results are as follows: Crystallization degree: 11.5 to 11). The pass range of 10.5 ~ 11.5); tempering degree: sufficient (qualified range of general ~ sufficient); nitrided layer depth: 0.17 ~ 0.20mm (passing range 0.13 ~ 0.30mm);