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Nickel-saving austenitic stainless steel and production method thereof

A technology of austenitic stainless steel and manufacturing method, which is applied in the field of metallurgy, can solve the problems of loss of material cold working performance, affecting material performance, etc., and achieves the effects of excellent corrosion resistance, simple manufacturing process, and good plasticity at room temperature

Active Publication Date: 2010-07-14
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the Mn content is high, it will affect the performance of the material, such as mechanical and corrosion resistance, and the Ni content in these steel types is low, which will lose the cold workability of the material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-4

[0028] After the hot rolling test of the present embodiment 1-4 and comparative examples 1-5, it was found that there were cracks in the edge of the hot-rolled sheet of comparative example 1, and some parts were severely cracked; No cracks were found in the hot-rolled sheet of 4, indicating that the thermoplasticity of the steel has been significantly improved after adding elements such as boron and rare earth. The hot-rolled sheet of Comparative Example 2 also has small cracks at the edge. It can be seen that when Cu exceeds 5%, the thermoplasticity of the steel is still poor even after adding elements such as boron and rare earth, and it is difficult to meet the hot processing requirements. Cracks also appeared on the edges of the hot-rolled sheets of Comparative Examples 3 and 4, indicating that the thermoplasticity of the steel could not be significantly improved when adding less elements such as boron and rare earth, and it was difficult to meet the requirements of hot pro...

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Abstract

The invention discloses a nickel-saving austenitic stainless steel. The weight percentages of chemical compositions are as follows: less than or equal to 0.1 percent of C, less than or equal to 2.0 percent of Si, 3.0 percent to 4.9 percent of Mn, less than or equal to 0.04 percent of P, less than or equal to 0.006 percent of S, 16.0 percent to 18.0 percent of Cr, 4.0 percent to 6.0 percent of Ni, 3.0 percent to 5.0 percent of Cu and less than or equal to 0.1 percent of N, 0.04 percent to 0.1 percent of Ce or 0.002 percent to 0.005 percent of B is added as well, and the rest is Fe and inevitable impurities. On the basis of the prior nickel-saving austenitic stainless steel, a moderate amount of Cu element is added, so that excellent plasticity is obtained, and meanwhile, since a Ce or B element is added, the stainless steel with good hot workability is obtained. On the basis of keeping the original low cost, the invention appropriately enhances the cold-forming property and the hot-working property.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to a formula of austenitic stainless steel and a manufacturing method thereof. Background technique [0002] With the continuous improvement of the economy and people's living standards, the demand for stainless steel is increasing day by day. The rapid growth of demand for stainless steel has stimulated the fluctuation of stainless steel price, and the price of stainless steel is directly affected by the fluctuation of nickel price. In order to reduce the production cost of stainless steel and alleviate the dependence on nickel, it has become inevitable to develop new products that save nickel and cost less. [0003] For the 304 series austenitic stainless steel with high nickel content, nickel is a scarce resource, and because of its own characteristics or the role of addition as an alloying element, nickel must be supplied stably and at a reasonable price, which is one of the best solu...

Claims

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Application Information

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IPC IPC(8): C22C38/58C22C33/04C21C5/52C21C7/068
CPCY02P10/20
Inventor 林刚沈继程江来珠
Owner BAOSHAN IRON & STEEL CO LTD
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