A strong antibacterial austenitic stainless steel used in chemical production

Abstract

The invention aims to provide a strong antibacterial austenitic stainless steel material and a preparation method thereof. The strong antibacterial austenitic stainless steel material has the functionof effectively resisting to high concentration bacteria (more than (1-2)*10<6>CFU / mL) under the condition of single solid solution heat treatment, and significantly reduces the risk of corrosion of bacterial microorganisms caused by the use of austenitic stainless steel. The strong antibacterial austenitic stainless steel comprises the chemical compositions of 15.0-19.0% of Cr, 5.0-9.0% of Ni, 0.5-4.5% of Cu, 0.2-3.5 %of Ga, less than or equal to 0.2% of N, less than or equal to 0.03% of C, less than or equal to 1.0% of Si, less than or equal to 2.0% of Mn, less than or equal to 0.045% of P,less than or equal to 0.03% of S and the balance Fe. The single solid solution heat treatment is that the temperature of solid solution is 1000-1200 DEG C, heat preservation is carried out for 0.1-3.0hours, and water cooling is carried out until room temperature. By adding the anti-bacterium element Ga, the novel strong antibacterial austenitic stainless steel can be widely used in chemical production containing high concentration bacteria.

Description

technical field [0001] The invention relates to the field of austenitic stainless steel materials, in particular to a novel strong antibacterial austenitic stainless steel used in chemical production and its preparation. Background technique [0002] Conventional stainless steel equipment for conveying or storing liquid, after long-term use, the accumulated scale or impurities will adhere to the inner wall of the pipe to breed microorganisms. The microorganisms will form a large flora after a certain period of time, which will cause extensive corrosion of the container or pipeline, and the quality of the liquid will also be polluted. With the improvement of people's living standards, antibacterial, antibacterial and antiviral health management has become an issue of great concern in today's society. The traditional way to prevent the spread of bacteria and microorganisms is to use fungicides, but they are easy to pollute and poison the natural environment. And so on, thus i...

AI Technical Summary

Problems solved by technology

Therefore, it is necessary to use antibacterial functional 301LN-Cu austenitic stainless steel for the chemical environment containing bacteria and microorganisms. However, due to the high concentration of bacteria in the chemical environment, it is affected by the limitations of the current antibacterial functional stainless steel. A kind of novel antibacterial austenitic stainless steel and its preparation method are effective ways

[0005] Traditionally, in order to ensure that the antibacterial functional metal has a good antibacterial effect, it needs to be treated for a long time, which will cause two problems: 1. Due to the alloying elements such as Cr, Ni and Mn in 301LN austenitic stainless steel The existence of , lead to the precipitation of carbides, sulfides and intermetallic phases during the aging process, which will sharply reduce the toughness and plasticity of the steel, cause brittle fracture of the material, and destroy the 301LN austenitic stainless steel. Good ductility

2. Aging treatment requires a certain amount of time and temperature control costs, which violates the original intention of using 301LN austenitic stainless steel to reduce costs

Images