High-toughness antibacterial stainless steel

Abstract

The invention relates to the technical field of stainless steel machining, in particular to high-toughness antibacterial stainless steel. The high-toughness antibacterial stainless steel comprises thefollowing elements in percentage by mass: 14.5-16.9% of Cr, 3.43-4.66% of Ni, 2.50-2.77% of Cu, 1.25-1.43% of Zn, 1.05-1.45% of W, 0.55-0.82% of C, 0.35-0.46% of Mn, 0.34-0.47% of Mo, 0.28-0.36% of Re, 0.01-0.02% of Ti and the balance Fe and inevitable impurities, wherein in the impurities, P is less than or equal to 0.03%, S is less than or equal to 0.03%, and H is less than or equal to 0.002%;the element Re contains Ce, Y and Dy; and the content ratio of Ce to Y to Dy is 2: 1: 2. The high-toughness antibacterial stainless steel also comprises no less than 0.03wt% of Ag. The Ag is injectedinto a stainless steel material subjected to heat treatment step by step by using a high-current metal ion implanter through a unsaturated diffusion method. The high-toughness antibacterial stainlesssteel is suitable for manufacturing kitchen sets, has high strength, high hardness and relatively good toughness, is unlikely to disintegrate in use and has good bacteria resistance and bacteria removal properties.

Description

technical field [0001] The invention relates to the technical field of stainless steel processing, in particular to a high toughness antibacterial stainless steel. Background technique [0002] Stainless steel is the abbreviation of stainless acid-resistant steel, and the steel grades that are resistant to weak corrosive media such as air, steam, water, or have stainless properties are called stainless steel; The steel grade is called acid-resistant steel. Due to the difference in chemical composition of the two, their corrosion resistance is different. Ordinary stainless steel is generally not resistant to chemical medium corrosion, while acid-resistant steel is generally stainless. Stainless steel does not just refer to one type of steel, but refers to more than one hundred kinds of industrial stainless steel, and each developed stainless steel has good performance in its specific application field. Stainless steel has the characteristics of high hardness, good wear resi...

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Problems solved by technology

[0005] Patent authorization announcement number CN102168226B discloses a nano-precipitated phase martensitic stainless steel. In this technical solution, Cu phase grains are uniformly dispersed in the stainless steel matrix, so that the stainless steel product has better antibacterial performance, but due to the Only relying on the Cu phase grains to exert the antibacterial effect leads to weak antibacterial performance of stainless steel, and because of the limitation of its heat treatment process, there is a problem of coarsening of the precipitated crystal phase. This coarse grain is precipitated on the surface of stainless steel, not only It is difficult to exert antibacterial and sterilizing effects, and it will also have a great impact on the toughness and strength of martensitic alloys

[0006] The patent authorization announcement number CN102994911B discloses a kind of austenitic composite antibacterial stainless steel, which also adds 0.016% Ag in the mass fraction in this type of stainless steel, thereby making the antibacterial performance of stainless steel more prominent, but the Ag in this technical solution is changed through Added by mixing and smelting, the Ag content is extremely low, and it is difficult to precipitate during use, so it cannot exert good antibacterial and antibacterial performance

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