Nickel-saving austenitic stainless steel with good corrosion resistance

Abstract

The invention relates to nickel-saving austenitic stainless steel with good corrosion resistance, which belongs to the field of metal materials. The nickel-saving austenitic stainless steel with good corrosion resistance comprises the following chemical components in percentage by weight: 0.05-0.08 percent of C, 0.3-0.6 percent of Si, 8-10 percent of Mn, 14-16 percent of Cr, 2-3 percent of Ni, 0-0.01 percent of S, 0-0.045 percent of P, 0.1-0.15 percent of N, 1-2 percent of Cu, 0.5-1.5 percent of Mo, 15-40ppm of B,10-30ppm of Ca, and the balance Fe and unavoidable impurity elements. The nickel-saving austenitic stainless steel has the advantages of reasonable formulation design, low content of nickel, low cost, good corrosion resistance and good hot-workability.

Description

technical field [0001] The invention relates to a nickel-saving austenitic stainless steel with good corrosion resistance, which belongs to the field of metal materials. Background technique [0002] 18-8 series austenitic stainless steel, commonly known as "304", this series of stainless steel is popular and widely used in electrical appliances, kitchen and bathroom products and Hardware and other industries. However, due to the high content of the precious metal nickel in this steel grade, nickel is a very scarce strategic resource in the world at present. The demand for austenitic stainless steel increases, causing a further rise in nickel prices, which in turn affects the production cost of austenitic stainless steel. Therefore, people have developed low-nickel austenitic stainless steel to replace high-nickel austenitic stainless steel. Different nickel content The composition of patents similar to low-nickel austenitic stainless steel with related alloying elements i...

AI Technical Summary

Problems solved by technology

[0006] The patent application number is 200710134321.0: Re element is added in this patent, which increases the difficulty of smelting and is difficult to implement in mass production

[0007] The patent application number is 200810060212.3: the patent Cr content is relatively low, and the N content is relatively high, so its corrosion resistance is relatively poor, and the thermal processing performance is not good

[0008] The patent application number is 200910128648.6: the patent Cr content is relatively low, its corrosion resistance is relatively poor, and Ni content is also relatively low, it is difficult to ensure the formation of a stable austenite structure, and its hot workability is also relatively poor

[0009] According to the above analysis, although there are more austenitic stainless steels with low nickel content, their cost has been greatly reduced compared with 304 stainless steel, but there are still two problems: one is the comparison of the corrosion resistance of these steel types Second, the hot workability of these steel types is relatively poor

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