High-precision rolling mill alloy splitting wheel and regeneration and manufacturing process thereof

Abstract

The invention discloses a high-precision rolling mill alloy splitting wheel and a regeneration and manufacturing process thereof. The rolling mill alloy splitting wheel is prepared from the following components in percentage by mass: 2.15 to 2.40 percent of C, less than or equal to 0.40 percent of Al, 0.3 to 0.5 percent of Mn, less than or equal to 0.030 percent of S, less than or equal to 0.030 percent of P, 8.00 to 10.50 percent of Cr, 1.5 to 1.8 percent of Ti, 0.05 to 0.12 percent of RE, 0.15 to 0.30 percent of V, 0.40 to 0.60 percent of Mo, less than or equal to 0.25 percent of allowable residual Ni, less than or equal to 0.30 percent of allowable residual Cu and the balance of Fe. According to the regeneration and manufacturing process, surface nitriding treatment is repeatedly performed on the splitting wheel; due to the gradient temperature control, nitrogen is combined with alloy elements in steel to form various alloy nitrides, particularly aluminum nitride and chromium nitride. The nitrides are extremely high in hardness and heat stability and extremely high in dispersity, so that a steel pipe subjected to nitriding can obtain high surface hardness, wear resistance, fatigue intensity, seizure resistance, resistance to atmosphere corrosion and superheated steam corrosion and resistance to tempering softening, and the notch sensitivity is reduced.

Description

technical field [0001] The invention belongs to the technical field of metal materials and surface treatment, and in particular relates to a high-precision rolling mill alloy splitting wheel and its regeneration manufacturing process. Background technique [0002] Iron and steel materials have high strength and hardness, as well as good plasticity and processability, so it is the most widely used structural material in the world today. However, no matter whether steel materials are used or placed in the atmospheric environment for a long time, they will gradually undergo chemical or electrochemical reactions with the surrounding medium, causing surface corrosion. Mild corrosion can cause the surface to lose its metallic luster and reduce precision. In severe cases, rust pits will appear on the surface, which will deteriorate or even break the mechanical properties of steel products and affect their service life. According to reports, in industrially developed countries, the...

AI Technical Summary

Problems solved by technology

However, no matter whether steel materials are used or placed in the atmospheric environment for a long time, they will gradually undergo chemical or electrochemical reactions with the surrounding medium, causing surface corrosion

Slight corrosion can make the surface lose its metallic luster and reduce precision. In severe cases, rust pits will appear on the surface, which will deteriorate or even break the mechanical properties of steel products and affect their service life.