Uniform high-carbon austenitic stainless steel plate resistant to intergranular corrosion and manufacturing method thereof
A technology with uniform structure and carbon austenite, applied in the field of iron and steel materials, can solve the problems of decreased intergranular corrosion resistance, mixed crystal grain size, undiscussed impact of steel plate intergranular corrosion resistance, thick gauge steel plate, etc. , to achieve the effect of fine and uniform grain size and excellent resistance to intergranular corrosion
Active Publication Date: 2022-05-20
ANGANG STEEL CO LTD
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Problems solved by technology
[0006] The patent document "A method for controlling the uniformity of grain size of hot-rolled high-carbon austenitic stainless steel" (acceptance number CN201911126633.6) discloses a three-stage heat treatment method for steel plates with a thickness of ≥10mm, respectively at 900-920°C , 1000-1010°C and above 1050°C are heat treated in stages to ensure that the difference in grain size at different positions in the thickness direction is ≤ 8 μm. do research
[0007] In order to solve the problems of grain size mixed crystals in high-carbon austenitic stainless steel and the decline in intergranular corrosion resistance, it is urgent to develop a special production method for austenitic stainless steel plate
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[0039] Below by embodiment the present invention will be further described.
[0040] In the embodiment of the present invention, smelting, casting, heating, rolling, heat treatment, and cold straightening are carried out according to the component ratio of the technical solution.
[0041] (1) Heating
[0042] The slab is sent to the heating furnace for heating. The slab is heated through the preheating section, the heating section and the soaking section and then released from the furnace; the temperature in the heating section is 1160-1200°C; the temperature in the soaking section is 1200-1230°C; The total holding time in the heating furnace is controlled at 6-7h;
[0043] (2) rolling
[0044] Two-stage rolling is adopted; the starting temperature of the first-stage rolling is ≥1190°C, the reduction rate of the first three passes is 16%-23%, and the rolling temperature of the first three passes is ≥1100°C, and the remaining single-pass rolling The reduction rate is control...
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Abstract
The invention provides a high-carbon austenitic stainless steel plate resistant to intergranular corrosion and a manufacturing method thereof. The composition of the steel plate is as follows by weight percentage: C: 0.07% to 0.11%, Si: 0.49% to 0.97%, Mn: 1.53%~2.51%, P:≤0.035%, S≤0.015%, Ni: 7.90%~9.40%, Cr: 19.10%~19.90%, V: 0.32%‑0.53%, W: 0.03%~0.06% , N: 0.04% to 0.12%, the rest is Fe and unavoidable impurities; the manufacturing method includes smelting, casting, heating, rolling, heat treatment, cold straightening; the present invention adopts two-stage controlled rolling method combined with three-stage solution treatment The way to produce austenitic stainless steel plate with a maximum thickness of 100mm, the grain size of the entire thickness section of the produced steel plate meets the requirements of grade 3 to 5 and there is no mixed crystal phenomenon, and the steel plate has good intergranular corrosion resistance.
Description
technical field [0001] The invention belongs to the field of iron and steel materials, and in particular relates to a high-carbon austenitic stainless steel plate with uniform intergranular corrosion resistance and a manufacturing method thereof. Background technique [0002] There are many kinds of stainless steel, which can be divided into ferritic stainless steel, austenitic stainless steel, austenitic-ferritic stainless steel, martensitic stainless steel and precipitation hardening stainless steel according to the classification of internal structure. Among them, austenitic stainless steel is the most important category of stainless steel. The main feature of austenitic stainless steel is that it has a non-magnetic austenite structure at room temperature, and the steel has a low yield ratio, good plasticity, and good welding performance. Its composition is characterized by high content of chromium (≥17%), nickel (8-25%) and other elements that improve corrosion resistan...
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IPC IPC(8): C22C38/02C22C38/44C22C38/46C22C38/58C22C33/04C21D8/02
CPCC22C38/02C22C38/46C22C38/58C22C38/44C22C38/001C22C33/04C21D8/0205C21D8/0226C21D8/0263Y02P10/20
Inventor 邢梦楠胡昕明欧阳鑫王储管吉春贾春堂安晓光孙殿东王勇黄松
Owner ANGANG STEEL CO LTD