Manufacturing method for austenitic stainless steel surface modification

Abstract

The invention discloses a manufacturing method for austenitic stainless steel surface modification. According to the manufacturing method, a metal material is modified through the manufacturing methodof high-pressure grinding material water jet-ionitriding composite treatment, and surface strengthening is carried out; even though the roughness of the surface of the metal material is increased after high-pressure grinding material water jet-ionitriding composite treatment is adopted, due to the fact that the surface of the treated metal material is machined and hardened, the plastic deformation resistance is improved, the hardness of the metal material is improved, a groove structure is formed on the surface, and a certain collecting function is achieved on grindings in the friction process; the friction coefficient of the metal material is kept stable all the time, and the surface has a good wear resisting and wear reducing function after being treated by the manufacturing method of high-pressure grinding material water jet-ionitriding composite treatment. The metal adopting high-pressure grinding material water jet-ionitriding composite treatment is light in wear trace, and the wear trace is uneven. The metal hardness is improved after nitriding treatment, high-hardness grindings can be generated in the in the friction process, the grindings are further refined to form grains, abrasion is increased, and therefore the friction coefficient is increased. It shows that high-pressure grinding material water jet-ionitriding composite treatment is adopted, a modified layer has agood protection function on a metal material matrix, and the bearing capacity and abrasive resistance of the metal material are improved.

Description

technical field [0001] The invention relates to the field of austenitic stainless steel materials, in particular to a manufacturing method for surface modification of austenitic stainless steel. Background technique [0002] Austenitic stainless steel has good comprehensive mechanical properties and process properties, and shows good corrosion resistance in both oxidizing and reducing media. In addition, austenitic stainless steel products have a high surface finish and are easy to clean and maintain. Therefore, austenitic stainless steel has been widely used in many fields such as industry, civil use, and national defense, and has become a steel with many types and the largest amount of use among stainless steels. more than half of. However, the disadvantages of austenitic stainless steel, such as low surface hardness, large friction coefficient, and poor wear resistance, have limited its application in the manufacture of friction parts. Based on the wear damage occurrin...

AI Technical Summary

Problems solved by technology

The hardness of austenitic stainless steel is low, and the difference in properties between the high-hardness coating-type modified layer and the stainless steel base material increases the internal stress of the modified layer and weakens the cooperative deformation ability, especially in the presence of impact and high stress The modified layer is prone to crushing, cracking, peeling and other phenomena

Once the above-mentioned damage occurs to the modified layer, the peeled-off hard debris will become abrasive particles, which will further aggravate the wear.

The modified layer with high hardness will cause wear to the frictional pair of its partner, which will affect the normal use of the frictional pair and accelerate its failure

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