A high-boron cast alloy guide and its heat treatment method

Abstract

A high-boron cast alloy guide and its heat treatment method pertain to the technical field of steel rolling. The chemical composition of the guide provided by the present invention (mass fraction, %):C 0.25-0.45, Cr 12.0-15.0, B 1.0-2.5, Mo 0.5-0.8, Mn 1.8-2.5, Al 0.10-0.30, Re 0.08-0.20, Mg 0.04-0.08, V 0.05-0.10, N 0.01-0.03, Ti 0.10-0.20, Nb 0.10-0.20, 0.25<=Ti+Nb<=0.35, Si<1.0, S<0.05, P<0.05, and Fe as the rest. Through smelting, casting, oil quenching, tempering and other steps, the present invention prepares a high-boron cast alloy guide with high hardness and strength, desirable tenacity and wear resistance, and low cost.

Description

A kind of high boron casting alloy guide and its heat treatment method technical field The invention belongs to the technical field of steel rolling, and in particular relates to a rolling mill guide and a manufacturing method thereof, in particular to a high-boron casting alloy guide and a heat treatment method thereof. Background technique During the rolling process, the working environment of the guides (including the guide plates and guide rollers) at the steel import and export of the rolling mill is very harsh, and the red hot steel above 900°C passes through the guides continuously, and at the same time, it needs to be cooled by spraying water. , the temperature difference changes greatly and sharply. Therefore, the guide wears quickly, has a low service life, needs to be replaced frequently, consumes a lot, and is prone to cracks and breaks, which affects the production efficiency of steel rolling. In addition, the steel sticking phenomenon is easy to occur during...

AI Technical Summary

Problems solved by technology

There are deficiencies such as complex production process, high production cost and poor toughness of guide rollers