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为适应石油化学纤维工业的发展,我厂研制出了纺织牵伸用无缝钢管。通过解剖法国和西德的牵伸管,经过多次的试验,最后我们采用45号钢代替国外的30Mn2铜,在国内首先研制出纺织牵伸用高强度高精度无缝钢管。该产品具有选材合理、冷加工变形适量、尺寸精度高、表面质量好、机械性能和金相组织稳定等优点,达到了法国水平,超过了西德。投产三年盈利50万元。
In order to meet the development of petrochemical fiber industry, I plant developed a seamless steel pipe drawing. After dissecting the draft tubes in France and West Germany, after several experiments, finally we used 45 steel to replace 30Mn2 copper in foreign countries. At first, we developed a high-strength and high-precision seamless steel tube for textile drafting in China. The product has the advantages of reasonable material selection, moderate deformation in cold working, high dimensional accuracy, good surface quality, stable mechanical properties and stable microstructure, reaching the level of France and surpassing that of West Germany. Three-year production profit 500,000 yuan.