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北京钢铁设计研究总院与武汉机械工艺研究所合作进行了冷却壁用TRQT40-20高韧性铁素体基耐热球墨铸铁的熔炼和浇铸工艺的研究。1987年3月30～31日在武汉召开了此项研究成果的专家评审会。到会专家和科研技术人员认为:用工频炉熔炼的铸态TRQ740-20球墨铸铁的性能(见附表)已达到了日本、西德同行业厂家的水平,并认为冷却壁浇铸时防钢管渗碳的涂料和工艺有效可靠。应用这两项新材料和新工艺,可从根本上满足我国目前冷却壁材料和钢管防渗
Beijing Institute of Iron and Steel Design and Research Institute of Machinery and Wuhan in cooperation with the cooling wall TRQT40-20 high toughness ferrite-based heat-resistant ductile iron melting and casting process. March 30, 1987 held in March 31 in Wuhan, the findings of this expert review. To experts and scientific and technical personnel to think: with the frequency furnace melting cast TRQ740-20 ductile iron performance (see table) has reached the level of Japan, West Germany with the industry manufacturers, and that the cooling wall when cast steel pipe Carburizing coatings and processes effective and reliable. Application of these two new materials and new technology can fundamentally meet our current cooling wall materials and pipe seepage control