High-carbon high-chromium martensite stainless steel and preparation method thereof
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A martensitic stainless steel, high carbon and high chromium technology, applied in the field of materials, can solve the problems of limited development and research, neglect, blockade, etc., and achieve the effect of excellent corrosion resistance
Active Publication Date: 2018-10-12
沈阳金锋特种刀具有限公司
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However, due to the relatively small demand for steel for knives and scissors and the special requirements for raw materials, the research and development of new materials in the domestic knives and scissors industry has been neglected, especially the development and research of high-quality high-carbon knives and scissors materials. It is even more limited, and foreign countries have long blocked my country in the preparation technology of high-quality knife steel
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[0039] The preparation process of the high-carbon high-chromium martensitic stainless steel of the present invention is: batching→smelting→casting molding→forging and thermal processing→cold processing and thermal treatment. Embodiments 1 to 5 are all prepared by the following methods, and the specific steps are as follows:
[0040] (1) mixing each chemical component according to the stated ratio, and obtaining a steel ingot through smelting and pouring;
[0041] (2) Forging the obtained steel ingot in the austenite single-phase region: the initial forging temperature is 1100°C-1200°C, the forging ratio is greater than 8, and air-cooled to room temperature after forging;
[0042] (3) Controlled rolling of the forged steel ingot: First, preliminary rolling in the recrystallization zone: the rolling temperature is 1050 ° C ~ 1200 ° C, the reduction of each rolling pass is controlled at 20 ~ 25%, and the total reduction is controlled 80-90%, air-cooled to room temperature after h...
Embodiment 1
[0046] In this embodiment, the chemical composition of high carbon and high chromium martensitic stainless steel is: C: 0.41wt.%, Cr: 14.17wt.%, Mo: 0.56wt.%, V: 0.14wt.%, Mn: 0.49wt .%, Si: 0.35wt.%, Ni: 0.17wt.%, O: 20ppm, N: 250ppm, S: 45ppm, P: 280ppm, and the balance is iron.
Embodiment 2
[0048] In this embodiment, the chemical composition of high carbon and high chromium martensitic stainless steel is: C: 0.44wt.%, Cr: 14.8wt.%, Mo: 0.53wt.%, V: 0.13wt.%, Mn: 0.49wt .%, Si: 0.60wt.%, Ni: 0.16wt.%, O: 23ppm, N: 420ppm, S: 30ppm, P: 238ppm, and the balance is iron.
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Abstract
The invention relates to high-carbon high-chromium martensite stainless steel and a preparation method thereof and belongs to the technical field of materials. The high-carbon high-chromium martensitestainless steel comprises the following chemical components in percentage by weight: 0.40-0.55% of C, 14.0-16.0% of Cr, 0.5-1.0% of Mo, 0.1-0.2% of V, less than or equal to 1.0% of Mn, less than or equal to 1.0% of Si, less than or equal to 0.30% of Ni, less than 0.05% of P, less than 0.005% of S, less than 0.004% of O, less than or equal to 0.1% of N and the balance ferrum. The preparation method of the high-carbon high-chromium martensite stainless steel comprises the following steps of proportioning, smelting, molding by casting, forging and hot working, and cold working and hot treating.By controlling the ratio of carbon and chromium atoms in a material within a certain range, the proportion of martensite and austenite is regulated after the hot treating process, the best match of strength and toughness of the material is obtained, and the high-carbon high-chromium martensite stainless steel shows a good corrosion-resisting property.
Description
technical field [0001] The invention relates to a high-carbon and high-chromium martensitic stainless steel and a preparation method thereof, belonging to the technical field of materials. Background technique [0002] High-carbon high-chromium martensitic stainless steel has the advantages of high hardness and good wear resistance, and is often used to manufacture knives and scissors. At present, different materials are usually selected according to different grades of knives and scissors at home and abroad. The material usually selected is high-carbon martensitic stainless steel. The knives and scissors materials in developed countries such as Europe, America and Japan are gradually moving from low-carbon stainless steel to high-carbon and high-chromium stainless steel. Among them, the chromium content is 14% to 18%, and the carbon content is 0.4. % to 0.8%, while adding other alloying elements to the steel to solid solution strengthen or improve hardenability of high-qual...
Claims
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