METHOD FOR PRODUCING HARDENED PARTS FROM SHEET STEEL

METHOD FOR PRODUCING HARDENED PARTS FROM SHEET STEEL

  • CN 104,372,278 A
  • Filed: 06/09/2004
  • Published: 02/25/2015
  • Est. Priority Date: 07/29/2003
  • Status: Active Application
First Claim
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1. manufactured the method for hardening structure part by steel sheet, comprise following methods step:

  • by the formation of parts cold shaping of being made up of the steel sheet with cathodic protection, be austenitizing and heat-treating subsequently, it is characterized in that,A) before the cold shaping of described forming element, among or afterwards described formation of parts is finally repaired and required perforation or manufacture perforation pattern, whereinB) described cold shaping and described finishing and described perforation and the arrangement of perforation pattern on described structural parts are carried out to make the mode of described formation of parts 0.5-2% less of final hardening structure part, whereinC) subsequently, for heat-treat and the formation of parts of cold shaping is at least heated to the temperature allowing steel austenitizings under the adding of ambient oxygen in subregion, andD) subsequently, the structural parts through heating to be transferred in mould hardening tool and to carry out mould sclerosis in this mould hardening tool, and wherein said structural parts cools by contact with mould hardening tool and extruded (maintenance) by mould hardening tool also thus hardens, andE) described cathodic protection coating is made up of the mixture formed primarily of zinc, and in this mixture, also comprise element oxygen to avidity that one or more total amounts account for the 0.1-15 % by weight of total mixture, wherein magnesium and/or silicon and/or titanium and/or calcium and/or aluminium are used as element oxygen to avidity in described mixture.

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