High-molybdenum white alloy chilled roller

Abstract

The invention discloses a high-molybdenum white alloy chilled roller. The high-molybdenum white alloy chilled roller comprises the following materials: 3.0-3.5% of C, 0.3-0.5% of Si, 0.5-0.6% of Mn, P not more than 0.06%, S not more than 0.03%, 0.3-0.5% of Cr, 0.8-1.0% of Mo, 0.6-0.7% of Ni, and the balance of Fe component; and the high-molybdenum white alloy chilled roller is prepared by the materials according to the mass percents. The high-molybdenum white alloy chilled roller is prepared by the following specific steps: firstly, matrix metal, pig iron for spherulitic graphite casting, waste steel and foundry returns are fed in an electric furnace for melting; molten iron is totally molten to reach 1400 DEG C; and the alloy elements are added according to the contents of all elements to reach the mass ratios of all the elements. The temperature is raised to 1450 DEG C after adding of the alloy elements, and is kept by 10 minutes for sampling examination to reach a metal element target value; and then, the pouring formation is performed. The high-molybdenum white alloy chilled roller increases the content of molybdenum, reduces the content of silicon, improves the purity of white matrix, and greatly improves the performances.

Description

[0001] 【Technical field】 [0002] The invention relates to the technical field of roll products, in particular to a high-molybdenum white alloy chilled roll. [0003] 【Background technique】 [0004] The roll is a part that plays a decisive role in the steel quality and output in the steel rolling process. At the present stage, there are chilled rolls, infinite chilled rolls, high, medium and low nickel-chromium-molybdenum rolls and other materials. In use Each has its own advantages and disadvantages, and the modern rolling steel manufacturing technology is constantly updated, which puts forward higher requirements for the performance of the rolls. Rolls of several materials used in the steel rolling industry at this stage, materials with too hard hardness have low compressive strength and are easy to be brittle, especially for rolling metal products with complex shapes, grooves and sharp corners, the hardness is lower, the compressive strength, If the toughness is high, the s...

AI Technical Summary

Problems solved by technology

Rolls of several materials used in the steel rolling industry at this stage, the materials with too hard hardness have low compressive strength and are easy to be brittle, especially for rolling metal products with complex shapes, grooves and sharp corners, the hardness is lower, the compressive strength, If the toughness is high, the smoothness of the rolled metal products will be poor, and even have pitting, which directly leads to a decline in product quality.