发明名称 Method for producing rolled steel products, particularly threaded steel tension members
摘要 To produce threaded steel tension members, steel is used with a C-content of 0.50 to 0.80%, preferably 0.75%, a Si-content of 0.20 to 0.50%, preferably 0.25%, and a Mn content of 0.30 to 0.80%, preferably 0.60%. Exiting from the rolling heat at the outlet side of the finishing stand after hot rolling, the tension member or rod is subjected to surface quenching by a cooling medium, preferably water, so that the steel in a rim zone R1 is transformed immediately and completely into martensite, while the heat content remaining in the core zone K1 does not effect a tempering of the martensite rim zone during the subsequent cooling beyond the range of the intermediate stage. Steel tension members of this type have a high ductility and toughness at a high yield limit and high strength, they are corrosion-resistant to a great degree and have a wear resistant surface which makes them particularly suitable for threaded tension rods in which the threads are produced either by a cold forming operation or hot rolled ribs.
申请公布号 US4877463(A) 申请公布日期 1989.10.31
申请号 US19880205556 申请日期 1988.06.07
申请人 DYCKERHOFF & WIDMANN AKTIENGESELLSCHAFT 发明人 AICHER, MAX;JUNGWIRTH, DIETER;KLEIN, HANS-WILHELM;RUSSWURM, DIETER
分类号 B21B1/16;C21D1/19;C21D8/08;C21D9/00;C21D9/52 主分类号 B21B1/16
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