Method for producing a hardened steel part

Method for producing a hardened steel part

  • CN 1,829,817 B
  • Filed: 06/09/2004
  • Issued: 01/07/2015
  • Est. Priority Date: 07/29/2003
  • Status: Active Grant
First Claim
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1. manufacture has a method for the hardened steel part of cathodic protection, wherein:

  • A) in continuous coating process, on the plate be made up of hardenable Steel Alloy, coating is applied, whereinB) this coating is made up of zinc substantially;

    C) also count one or more high oxygen affinity elements of 0.1-15 % by weight with whole coating containing total amount in this coating, described high oxygen affinity element is magnesium and/or silicon and/or titanium and/or calcium and/or aluminium and/or manganese and/or boron;

    WithD) through coating the steel sheet be made up of hardenable Steel Alloy at least in some region along with atmospheric oxygen add be heated to subsequently sclerosis necessary temperature, and heated until its experienced by sclerosis necessary microstructure change;

    WhereinE) epidermis be made up of the oxide compound of one or more high oxygen affinity elements described is defined on the coating layer;

    WithF) described plate was shaped before or after described heating;

    WhereinG) after fully heating, described plate is cooled, calculates the speed of cooling to realize the sclerosis of alloy sheets,Being characterised in that the enforcement of coating meets original thickness is 15 μ

    m, and after this hardening process, it produces and is at least 4 J/cm 2galvanic protection energy.

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