Food-grade high wear-resistant martensitic stainless steel material and preparation method thereof

Abstract

The invention relates to a food-grade high-wear-resistant martensitic stainless steel material and a preparation method thereof, and belongs to the field of stainless steel materials. The stainless steel material is prepared from the components in percentage by weight: 0.4 to 0.5 percent of C, 16.0 to 16.5 percent of Cr, 0.4 to 0.5 percent of Ni, 0.8 to 0.9 percent of Mo, 0.3 to 0.4 percent of Mn,0.3 to 0.4 percent of Si, smaller than 0.03 percent of P, smaller than 0.01 percent of S, and the balance iron and inevitable impurities; and the stainless steel material can further contain 1.5 to 2.2 percent of Cu. According to the food-grade high-wear-resistant martensitic stainless steel material and the preparation method thereof provided by the invention, through adding the C and the Cr with higher contents, the corrosion resistance of the material is balanced; through controlling Cr equivalent weight, a martensitic structure is obtained, and the content of delta ferrite is ensured to be lower than 2 percent; through adjusting the mass ratio of the Mo and the C, the C is solidified by the Mo, so that the corrosion resistance is ensured; and meanwhile, through adding appropriate amount of Cu and optimizing a material preparation process, the dispersive precipitation of molybdenum-containing carbide and a copper-rich phase is further obtained, a high-hardness martensite matrix isfinally obtained, and a broad-spectrum antibacterial performance is realized at the same time.

Description

technical field [0001] The invention belongs to the field of stainless steel materials, in particular to a food-grade high wear-resistant martensitic stainless steel material and a preparation method thereof, in particular to a scratch-resistant, high-hardness, antibacterial and excellent corrosion-resistant stainless steel for metal tableware products Materials and preparation methods thereof, the stainless steel is mainly used in the manufacture of stainless steel tableware, such as chopsticks, knives, forks, spoons and the like. Background technique [0002] With the improvement of people's living standards, the quality requirements for daily necessities are also constantly improving. Tableware belongs to this category of products. People not only require it to have excellent corrosion resistance, recyclability, elegant appearance, easy to clean and not easy to damage, but also require it to have antibacterial function. In recent years, stainless steel tableware has beco...

AI Technical Summary

Problems solved by technology

In order to improve this problem, some manufacturers provide consumers with regular free return to the factory for polishing, but this will greatly increase the cost of the manufacturer and bring inconvenience to consumers.

Therefore, it is necessary to provide a new stainless steel material with high hardness, low cost and scratch resistance, so as to solve the problem that the current stainless steel tableware is prone to scratches

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