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分别利用金相学与统计过程控制(SPC)的原理,研究了18Cr Ni Mo7-6风电齿轮轴产品渗碳淬火热处理的氧化,探索了SPC原理在渗碳热处理中的应用,讨论了在车间生产中控制表面氧化的措施。研究表明,直接淬火的齿面一般不发生氧化皮剥落,而一次加热淬火的则发生外氧化层的剥落;对于长周期渗碳的齿轮轴来说,其内氧化深度受渗碳时间的影响并不显著;应从优化启炉时间、工艺气体纯度、炉体密封性、烧炭黑等方面控制风电齿轮产品的表面氧化,并保证工艺过程是稳态受控的。
The oxidation of carburizing and quenching heat treatment of 18Cr Ni Mo7-6 wind gear shaft was studied respectively by using the principle of metallography and statistical process control (SPC), the application of SPC principle in carburizing heat treatment was discussed, and the control in workshop production Surface oxidation measures. The results show that the direct quenching of the tooth surface spalling does not occur generally, and a quenching occurs when the outer oxide layer flaking; for long-period carburizing gear shaft, the depth of its internal oxidation by the carburizing time and Which is not significant. The surface oxidation of wind gear products should be controlled from the aspects of optimizing the opening time, the purity of the process gas, the tightness of the furnace body and the burning of carbon black, and ensures that the process is controlled in a steady state.