Heat-treatment technology for Chinese ancient double-edged sword

Heat-treatment technology for Chinese ancient double-edged sword

  • CN 1,209,461 A
  • Filed: 08/22/1997
  • Published: 03/03/1999
  • Est. Priority Date: 08/22/1997
  • Status: Abandoned Application
First Claim
Patent Images

1. In cool outer thermal treatment.Outer low water temperature is quenched.The center molten steel casting does not quench.Skin is subjected to the heat transfer at center, naturally annealing.

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