真空热处理实用技术

Practical technology of vacuum heat treatment

真空炉内工件被加热的速度明显“滞后”,温度越低滞后越严重。如何选择升温、均热、保温的时间?这是使用、操作真空炉的技术人员和工人遇到的普遍问题。用实测、计算、观测颜色等确定真空炉内加热时间的方法各有利弊。实测法仅能用于单室炉,计算法和观测颜色法相互辅助使用可兼顾加热效果和效率。真空碳氮共渗技术和气体碳氮共渗相比,具有无晶界氧化层、节气、废气排放少、环保等特点。

If the time choice of temperate rising, soaking and heat preservation is not appropriate, heat treatment quality would be serious influenced. Many time confirming methods, such as measure, calculation or observation, have its defect. Measuring method can be used for a single chamber furnace only. Method of calculation and observation can be used together to ensure result and efficiency of heating. The vacuum hydrogen protection furnace has the same level magnetism ability （Bs, μm, Hc） with common hydrogen furnace after handling 1JS0, TD4E, but the former has no hydrogen frailty and lower handle expenses. Compared with gas carbonitriding, vacuum carbonitriding has many characteristic, such as no oxydic layer of grain boundary, saving gas, little amount of waste gas, environmental protection, etc.