Method for preparing high nitrogen and nickel-less austenitic stainless steel

Method for preparing high nitrogen and nickel-less austenitic stainless steel

CN
  • CN 100,532,609 C
  • Filed: 06/04/2008
  • Issued: 08/26/2009
  • Est. Priority Date: 06/04/2008
  • Status: Active Grant
First Claim
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1. , a kind of method of under normal pressure, making high nitrogen and nickel-less austenitic stainless steel, it is characterized in that the basic molten steel of little carbon Cr-Mn that refining is to be cast adds the high nitrogen alloy of granular or strip or sheet or its mixing shape fast and carries out the short mix stirring before cast or in the cast, fast contain molten steel not molten or the slightly soluble high nitrogen alloy and be cast into steel again this, by thermal distortion processing and solution treatment the high nitrogen alloy in the steel is decomposed also solid solution in austenite again, wherein:

  • if the granularity of adding high nitrogen alloy is between 2~

    50 orders before the cast, churning time is 5~

    100s, adds the granularity of high nitrogen alloy between 30~

    300 orders in the time of as if cast.

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