High-strength high-toughness wear-resistant high-chromium cast iron and preparation method thereof

A high-chromium cast iron, high-strength and high-toughness technology, applied in the field of wear-resistant metal materials

Inactive Publication Date: 2021-09-28
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most studies still focus on single-element and dual-element metamorphism

Method used

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  • High-strength high-toughness wear-resistant high-chromium cast iron and preparation method thereof
  • High-strength high-toughness wear-resistant high-chromium cast iron and preparation method thereof
  • High-strength high-toughness wear-resistant high-chromium cast iron and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Adopt 500 kilograms of medium-frequency induction furnaces to smelt boron white cast iron of the present invention, and its manufacturing process steps are:

[0041] 1) Take scrap steel, ferrochrome and pure iron according to the mass ratio of 40%: 9%: 49.2%, mix them, fill them into the melting furnace, and heat them until they melt;

[0042] 2) Add microelement powder in the melting furnace: 0.3% Nb, 0.3% Ti, 0.3% Re for microalloying, and at the same time pass argon gas to remove impurities, the time is 25min;

[0043] 3) Bottom punching method: add 0.3% bulk ferroboron with a size less than 10mm in the furnace;

[0044] 4) Raise the temperature of the smelting furnace to 1500°C, add deoxidizer aluminum wire, and add 0.6% K / Na modifier by pouring into the bottom after the furnace charge is completely melted;

[0045]5) When the temperature of the molten steel reaches 1450°C, cast it into a casting, then keep the casting at 1000°C for 4 hours, air cool to room temper...

Embodiment 2

[0048] Adopt 500 kilograms of medium-frequency induction furnaces to smelt boron white cast iron of the present invention, and its manufacturing process steps are:

[0049] 1) Take scrap steel, ferrochromium and pure iron according to the mass ratio of 40%: 9%: 48.4%, mix them, fill them into the melting furnace, and heat them until they melt;

[0050] 2) Add microelement powder in the melting furnace: 0.4% Nb, 0.4% Ti, 0.5% Re for microalloying, and at the same time pass in argon gas to remove impurities for 30 minutes;

[0051] 3) Bottom punching method: add 0.3% bulk ferroboron with a size less than 10mm in the furnace;

[0052] 4) Raise the temperature of the smelting furnace to 1500°C, add deoxidizer aluminum wire, and add 1.0% K / Na modifier by pouring into the bottom after the furnace charge is completely melted;

[0053] 5) When the temperature of the molten steel reaches 1450°C, cast it into a casting, then keep the casting at 1000°C for 4 hours, air cool to room temp...

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Abstract

The invention belongs to the technical field of wear-resistant metal materials, and particularly relates to high-strength high-toughness wear-resistant high-chromium cast iron and a preparation method thereof. The cast iron comprises the following chemical components in percentage by weight: 2.5 to 3.5 percent of C, 0.5 to 1.0 percent of Si, 15 to 18 percent of Cr, 0.4 to 0.6 percent of B, 0.3 to 0.5 percent of Nb, 0.3 to 0.5 percent of Ti, 0.6 to 1 percent of K/Na, 0.3 to 0.5 percent of Re and the balance of Fe. By adding effective alloy elements and carrying out modification treatment, the high-chromium cast iron provided by the invention can refine a matrix structure, improves the form and distribution of corresponding carbides to improve the strength and toughness of the high-chromium cast iron, and can improve the wear resistance of the high-chromium cast iron. The macrohardness of the cast iron provided by the invention is as high as 63 HRC to 66 HRC, and the impact toughness of the cast iron is as high as 13.5 J/cm<2> to17.5 J/cm<2>.

Description

technical field [0001] The invention belongs to the technical field of wear-resistant metal materials, and in particular relates to a high-strength, high-toughness, wear-resistant high-chromium cast iron and a preparation method thereof. Background technique [0002] Improving the wear resistance and service life of mechanical parts has always been the most concerned issue of scientific researchers, which essentially depend on the research and control of wear-resistant materials. As the service conditions of modern machinery manufacturing industry become more and more harsh, and the requirements for high precision, long life and high reliability continue to increase, the development of wear-resistant materials plays an important role in promoting and supporting the development of high-tech, high chromium Cast iron materials have become a new generation of wear-resistant materials, and are also key materials in high-tech fields such as information, biology, energy, environmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/06C22C37/10C22C33/08C21C1/08C21D1/18C21D5/04
CPCC22C37/06C22C37/10C22C33/08C21C1/08C21D1/18C21D5/04C21D2211/008C21D2211/004Y02P10/20
Inventor 李卫易艳良涂小慧陈鹏
Owner JINAN UNIVERSITY
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