Composite roller for high vanadium high speed steel and its production process

Abstract

The invention offers the high V super-speed steel complex roller and its producing craft. The roller includes roller heart and roller shell, the roller heart uses low metal alloy steel or middle carbon steel to produce, the shell uses high V super-speed steel, whose main element is : C: 1.8--3.5A%, V: 7--12%, Cr: 4--5%, Mo: 2--4%, Ni: 0.5--1.5%, other is Fe. The producing craft is: melt and cast the heart and shell by responding heat way. The roller in the invention has good whet feature, high rate of feature and price, using safely. Fine roller, high strength of combination, no crush in use; it can reduce the stop times. It efficiently increase the roller tenacity and whet feature, solve the problems in the heart leaving foundry, and solve the problems of complicated craft and high cost.

Description

Technical field

[0001] The invention belongs to the main wear-resistant part of the steel rolling industry—roll technology, and mainly relates to a high-vanadium high-speed steel composite roll and a production process. Background technique

[0002] The roll is a key wear-resistant part consumed in large quantities in steel rolling production, and its quality directly affects the quality of steel rolling, labor productivity and product profit. At present, the materials used to produce rolls mainly include: cast steel, alloy semi-steel, spherical graphite cast steel, chilled cast iron, infinite chilled cast iron, high nickel-chromium infinite chilled cast iron, alloy ductile iron, high chromium steel, high chromium Cast iron, high speed steel, hard alloy. Among these materials, high-chromium cast iron is recognized as a roll material with better comprehensive mechanical properties and wear resistance. Its structure is characterized by M7C3 carbide embedded on the matrix of m...

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