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Titanium-containing austenitic stainless steel with good antioxidation performances and manufacturing method thereof

A technology of austenitic stainless steel and oxidation resistance, applied in the field of titanium-containing austenitic stainless steel and its manufacturing, can solve problems such as poor surface quality, nodules at the casting nozzle, and "fishing" of the crystallizer, so as to improve manufacturability , Reduce demand, improve adhesion and lubricity

Active Publication Date: 2016-12-28
BAOSTEEL DESHENG STAINLESS STEEL
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, the production of Ti-containing austenitic stainless steel is very difficult, and there are three major difficulties: one is nodules at the submerged nozzle; question
Excessive content of Ti inclusions leads to nodules at the casting nozzle and poor surface quality

Method used

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  • Titanium-containing austenitic stainless steel with good antioxidation performances and manufacturing method thereof
  • Titanium-containing austenitic stainless steel with good antioxidation performances and manufacturing method thereof
  • Titanium-containing austenitic stainless steel with good antioxidation performances and manufacturing method thereof

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Embodiment Construction

[0048] The present invention will be further described below in conjunction with the embodiments and accompanying drawings.

[0049] Table 1 is the composition of the steel of the embodiment of the present invention, Table 2 is the manufacturing process of the steel of the embodiment of the present invention, and Table 3 is the performance of the steel of the embodiment of the present invention.

[0050] It can be seen from Table 3 that the oxidation resistance of the steel of the present invention is greatly improved at high temperature, specifically, the oxidation weight gain is less than 0.05mg / cm2 under the condition of oxidation at 800°C for 100 hours, and it has good surface quality.

[0051] Depend on figure 1 It can be seen that the grain structure of the steel of the present invention is uniform, the recrystallization is sufficient, and there is no carbide precipitation in the grain boundary and in the grain, which ensures good intergranular corrosion resistance.

[...

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Abstract

The invention discloses titanium-containing austenitic stainless steel with good antioxidation performances and a manufacturing method thereof. The titanium-containing austenitic stainless steel comprises, by mass, 0.025-0.035% of C, 0.6-1.0% of Si, 1.2-2.0% of Mn, less than or equal to 0.035% of P, less than or equal to 0.030% of S, 17.0-19.0% of Cr, 9.00-12.00% of Ni, 0.01-0.03% of N, less than or equal to 0.2% of Ti, less than or equal to 0.2% of Nb, 0.01-0.03% of Ce and the balance Fe and unavoidable impurities. The use amount of Ti and Nb is greater than or equal to five-fold amount of C or the use amount of Ti and Nb is greater than or equal to five-fold amount of C and N. In melting, rare earth Ce is used and after continuous casting, plate blank surface grinding, plate blank heating, rolling and heat treatment, a steel product is obtained so that steel product manufacturability, surface quality and high temperature oxidation performances are substantially improved.

Description

technical field [0001] The invention relates to the field of titanium-containing austenitic stainless steel materials, in particular to a titanium-containing austenitic stainless steel with good oxidation resistance and a manufacturing method thereof. Background technique [0002] Titanium-containing austenitic stainless steel has good intergranular corrosion resistance and welding performance, and has been widely used in chemical industry, aerospace, pressure vessels and other fields. However, the production of Ti-containing austenitic stainless steel is very difficult, and there are three major difficulties: one is nodules at the submerged nozzle; question. Specifically, during the continuous casting of molten steel, the submerged nozzle is severely nodulated, which makes continuous casting production difficult, and the phenomenon of "fish formation" often occurs in the crystallizer, which makes continuous production impossible. [0003] Studies have shown that due to th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/58C22C38/50C22C38/48C22C38/40C22C33/06C21D8/02
Inventor 王如萌陆斌
Owner BAOSTEEL DESHENG STAINLESS STEEL
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