论文部分内容阅读
ZL_3合金活塞只需铸态后人工时效,无须T_6处理。87年我厂曾发生过一炉次874只ZL_（3）合金活塞过时效,即在时效2小时后,因电器故障,0─300℃温度计的水银冲设项后失控,炉内温度升高、高温持续约30分钟。 出炉后活塞硬度为71—86HB,将打过硬度活塞再时效,硬度不变、即并非回归软化,而是过时效软化。为挽救该批活塞,作如下T_（6）等处理与分析:
ZL_3 alloy piston as-cast artificial aging, without T_6 treatment. 87 years I had a furnace plant a total of 874 ZL_ (3) piston alloy over-aging, that is, after 2 hours aging, due to electrical failure, 0 ─ 300 ℃ mercury thermometer mercury out of control after setting, the furnace temperature , High temperature lasted about 30 minutes. Piston hardness baked 71-86HB, will play the hardness of the piston re-aging, the same hardness, that is not regression softening, but over-aging softening. To save the batch of piston, make the following T_ (6) and other processing and analysis: