“六五清砂”是我国工人阶级在毛泽东思想的光辉照耀下,从长期生产实践中总结创造成功的一项清砂先进技术。它的广泛采用将使铸件清砂工作发生根本性的革命。清砂后铸件的质量检查是十分重要的,铸件清砂温度一般在相变温度以下,对金相组织、应力分布、硬度等没有很大 The “June 5 Clear Sands” is an advanced sand cleaning technology that the working class in our country has summed up to create success under long-term production practice under the brilliant shining of Mao Zedong Thought. Its extensive use of sand casting will make a fundamental revolution in the work. After sand cleaning quality inspection is very important, sand casting temperature is generally below the phase transition temperature, the microstructure, stress distribution, hardness, etc. not much