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解放后,由于党的领导和关怀(图一为朱德委员长1959年在第四砂轮厂视察)我国磨料磨具行业职工发扬自力更生,奋发图强的精神,于1950年在沈阳苏家屯砂轮厂试制成功黑碳化硅,1952年试制成功绿碳化硅。棕刚玉是1951年在苏家屯砂轮厂用容量为550KVA的单相电弧炉试制成功后,于1954年转入山东张店砂轮厂用容量为720KVA的三相电弧炉试制成功。第二年接着试制成功白刚玉,以后又陆续
After the liberation, due to the leadership and care of the party (Figure 1, Chairman Zhu De visited the No.4 Grinding Wheel Factory in 1959), the workers in our abrasive industry carried forward the spirit of self-reliance and work hard to make a success. In 1950, the company successfully made trial in Shenyang Sujiatun Grinding Wheel Factory Black silicon carbide, 1952 trial success green silicon carbide. In 1951, corundum was successfully trialled in a single-phase electric arc furnace with a capacity of 550KVA in Sujiatun Grinding Wheel Factory, and was successfully put into operation in 1954 in Zhangdian Grinding Wheel Factory of Shandong Province for a three-phase electric arc furnace with a capacity of 720KVA. The second year followed by trial production of white corundum, and later one after another