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上海第三钢铁厂参照JISG3192—1977,JISD 4218—1989日本工业标准,经两年时间成功地开发出12.5号出口槽钢、7.50 V—20汽车轮辋型钢新产品。1992年11月通过上海市冶金工业局组织的鉴定。该两项新产品为同内首创。其孔型技术独特。克服了12.5号出口槽钢腿高壁薄,腿内侧度小和7.50V—20汽车轮辋型钢小沟槽内侧面倒勾10度的难题。产品截面尺寸精确、性能稳定、工艺成熟,已形成的批量生产品完全达到中外客商的使用需要。目前12.5号出口槽钢已出口创汇。7.50V—20汽车轮辋型钢除在国内已获经济效益外,已通过四川新都钢圈厂、上海汽车锻造总厂钢圈制造厂制成车轮3万套出口东南亚。 12.5号出口槽钢、7.50V—20汽车轮辋
According to JISG3192-1977 and JISD 4218 - 1989 Japanese industrial standards, Shanghai No.3 Iron and Steel Mill successfully developed a new product of 12.5mm exit channel and 7.50 V-20 automobile rim steel after two years. November 1992 passed the appraisal of Shanghai Metallurgical Industry Bureau. The two new products are the same as the first. Its unique hole technology. Overcoming the difficulty of 12.5-inch outlet pipe high-thin-walled steel legs, small inside of the legs and 10 degrees of undercutting of the inner side of the small groove of 7.50V-20 automobile rim steel. Product cross-section size is accurate, stable performance, mature technology, has formed a mass production of products fully meet the needs of Chinese and foreign investors. The current No. 12.5 export channel has been earning foreign exchange. 7.50V-20 car rim steel in addition to the economic benefits have been obtained in China, has been through Sichuan Xindu steel ring factory, Shanghai Automotive Forging Factory steel ring manufacturing plant made 30,000 sets of wheels exported to Southeast Asia. 12.5 exit channel, 7.50V-20 car rim