A kind of ultra-pure ferritic antibacterial stainless steel and its manufacturing method
A technology of antibacterial stainless steel and ultra-pure iron, which is applied in the field of manufacturing ultra-pure ferritic antibacterial stainless steel, can solve the problems that ferritic stainless steel does not meet the ultra-pure requirements, and achieve the effect of excellent corrosion resistance
Inactive Publication Date: 2016-01-20
UNIV OF SCI & TECH BEIJING
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Problems solved by technology
[0004] Existing patents, high carbon content, C ≥ 0.02%, C + N ≥ 0.04%, ferritic stainless steel does not meet the ultra-pure requirements
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[0016] The specific implementation of the ultra-pure ferritic stainless steel and the preparation method will be described below in conjunction with specific examples. But the specific implementation mode of the present invention is not limited to the following specific examples.
[0017] The chemical composition of embodiment steel and comparative example steel is as shown in table 1, and embodiment steel is smelted through electric furnace-AOD-VOD three-step method through batching, is continuously cast into steel slab, and casting slab is ground 0.5mm, sends to heating furnace, with Heating at 7°C / min to 550°C, then heating to 1050°C at 10°C / min, then heating to 1250°C at 25°C / min, and keeping warm for 2 hours. The rolling starts at 1080°C, the final rolling temperature is 900°C, and then water-cooled to 350°C for coiling. The hot-rolled plate is subjected to antibacterial heat treatment at a temperature of 750°C for 6 hours, pickled and ground, then cold-rolled to a thick...
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The invention discloses ultrapure ferrite antibacterial stainless steel and a manufacturing method thereof. The ultrapure ferrite antibacterial stainless steel comprises the following chemical components: less than or equal to 0.010 percent of C, less than or equal to 0.010 percent of N, less than or equal to 0.6 percent of Si, less than or equal to 0.3 percent of Mn, less than or equal to 0.03 percent of P, less than or equal to 0.02 percent of S, less than or equal to 1 percent of Ni, 16-22 percent of Cr, 1.2-2.0 percent of Cu, 0.1-0.5 percent of Nb, 0.1-0.3 percent of Ti and the balance of balanced iron and inevitable impurities, wherein the content of C+N is less than or equal to 0.015 percent. The manufacturing method comprises the following steps: smelting, continuous casting, hot rolling, annealing, pickling, cold rolling and annealing. With adoption of niobium-titanium bistable ultrapure design, the stainless steel is subjected to antibacterial annealing treatment at the temperature of about 75 DEG C for over 2 hours after hot rolling. The obtained antibacterial stainless steel has the antibacterial ratio of over 90 percent, is high in surface quality, has high plasticity, corrosion resistance and good cold working performance and is applied to the aspects of household appliances, tableware, kitchen utensils and the like.
Description
technical field [0001] The invention relates to a manufacturing method of ultra-pure ferritic antibacterial stainless steel. Through refining and bi-stabilization of niobium and titanium, the content of C and N elements is controlled to reach C+N≤0.015%, and the content of copper is added to exceed 1.2%, so that the material exhibits good performance. Excellent antibacterial performance, corrosion resistance and formability, can be used in household appliances, tableware and kitchen utensils, etc. Background technique [0002] Since the beginning of the 21st century, the sustainable development strategy has made the development of new materials must be environmentally friendly as a prerequisite. People pay more and more attention to the quality of life and living environment, but microorganisms invade people all the time, and the spread and spread of harmful bacteria seriously threaten people's health. Antibacterial and antibacterial sanitation management has become a great...
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IPC IPC(8): C22C38/28C22C38/50
Inventor 赵爱民尹鸿祥赵征志周开春张岩张聪胡汉江梁江涛武会宾米振莉
Owner UNIV OF SCI & TECH BEIJING