High-wear-resistance high-chromium cast iron universal roll collar and preparation method thereof

A high-chromium cast iron, high wear-resistant technology, used in casting molding equipment, molds, rolls, etc., can solve the problems of short rolling cycle, poor wear resistance, no wear resistance, etc. Effect of surface hardness and texture homogeneity, preventing risk of cracking

Active Publication Date: 2021-10-26
SINOSTEEL XINGTAI MACHINERY & MILL ROLL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the materials that can be selected for the horizontal roll rings of section steel universal rolling mills include graphite steel, semi-steel and high-carbon semi-steel. The horizontal roll rings of the above three materials have good strength and toughness, but poor wear resistance. wear problem

Method used

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  • High-wear-resistance high-chromium cast iron universal roll collar and preparation method thereof
  • High-wear-resistance high-chromium cast iron universal roll collar and preparation method thereof
  • High-wear-resistance high-chromium cast iron universal roll collar and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Put the prepared alloy raw materials into an intermediate frequency furnace for smelting. The weight percentage of the raw material alloy composition and each alloy composition is C: 2.40%, Si: 0.80%, Mn: 0.85%, Cr: 15.0%, Ni : 1.45%, Mo: 1.40%, V: 0.85%, P≤0.03%; S≤0.03%, the rest is Fe and unavoidable impurities.

[0034] (2) After the smelting in step (1) is completed, the molten steel is quenched for 25 minutes.

[0035] (3) When the temperature of the molten steel reaches the melting point of the molten steel + 80°C, pouring is started using the overall method;

[0036] (4) Carry out quenching treatment after the cast casting that step (3) pours is machined, and quenching temperature is 1060 ℃, then cools;

[0037] (5) When cooling to 420°C, stop cooling and carry out two-stage tempering treatment, the tempering temperature is 570±5°C, and the tempering time is 35h respectively to obtain a high wear-resistant high-chromium cast iron universal roll ring and a g...

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PUM

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Abstract

The invention relates to a high-wear-resistance high-chromium cast iron universal roll collar and a preparation method thereof, and belongs to the technical field of machining. The high-wear-resistance high-chromium cast iron universal roll collar comprises the following alloy element components of, in percentage by weight, 2.00%-3.00% of C, 0.30%-1.20% of Si, 0.50%-1.50% of Mn, less than or equal to 0.03% of P, less than or equal to 0.03% of S, 12.0%-22.0% of Cr, 0.50%-3.00% of Ni, 0.60%-2.00% of Mo, 0.10%-2.00% of V and the balance Fe and inevitable impurities. The prepared alloy raw materials are put into an intermediate frequency furnace to be smelted and then are poured in an integral mode. The comprehensive performance of the universal roll collar prepared by the method can meet the requirements of a horizontal roll collar of a section steel rolling line universal rolling mill, the on-machine period is prolonged, the steel passing amount of a rolled material is improved, the surface quality of the rolled material is improved, the integral pouring mode improves the compactness of the roll collar structure and improves the integral use effect of the product.

Description

technical field [0001] The invention relates to a high-wear-resistant high-chromium cast iron universal roller ring and a preparation method thereof, belonging to the technical field of mechanical processing. Background technique [0002] When the frame of the shaped steel universal rolling mill is working, the shaped steel web and flange are in contact with the outer circle and both ends of the horizontal roll ring. The main working surface of the horizontal roll ring is the outer circle and the two ends. For type contact wear, the horizontal roller ring must have good wear resistance and accident resistance, that is, the horizontal roller ring is required to have high wear resistance, and at the same time, the hardness drop should be small. [0003] At present, the materials that can be selected for the horizontal roll rings of section steel universal rolling mills include graphite steel, semi-steel and high-carbon semi-steel. The horizontal roll rings of the above three m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/08C22C37/10C22C33/08C21C1/08B22C9/24C21D1/18C21D5/00C21D9/40B21B27/02
CPCC22C37/08C22C37/10C22C33/08C21C1/08B22C9/24C21D1/18C21D5/00C21D9/40B21B27/02C21D2211/008C21D2211/001
Inventor 刘娣杜江伟杜旭景胡兵
Owner SINOSTEEL XINGTAI MACHINERY & MILL ROLL
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