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真空炉在进行热处理时的小常识
真空炉处理钛合金时,不宜用氮气作为冷却气体,因为钛和氮在高温下反应,形成金黄色的氮化钛。
真空炉活动连接部分全部采用O型橡胶圈密封连接,此部分均通水冷却。
工件在真空状态下淬火,应使用真空淬火油,此油具有较低的饱和蒸气压。
真空炉的保养应在真空或充纯氮状态下,避免平时不用时吸气,吸潮。
国内真空炉的压升率应不大于1.33Pa/h,国外某些企业的标准为0.67Pa/h
真空加热以辐射为主,工件在炉内应该保持间距。
When the titanium alloy is treated by a vacuum furnace, it is not preferable to use nitrogen as a cooling gas because titanium and nitrogen react at a high temperature to form golden yellow titanium nitride.
The movable connection parts of the vacuum furnace are all sealed by O-rings, and this part is cooled by water.
When the workpiece is quenched under vacuum, vacuum quenching oil should be used, which has a lower saturated vapor pressure.
The maintenance of the vacuum furnace should be under vacuum or pure nitrogen, so as to avoid inhalation and moisture absorption when not in use.
The pressure rise rate of domestic vacuum furnace should be no more than 1.33Pa/h, and the standard of some foreign enterprises is 0.67Pa/h.
The vacuum heating is mainly based on radiation, and the workpiece should be kept in the furnace.
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