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Preparation method of high-toughness wear-resistant steel casting

A steel casting, high toughness technology, applied in the field of preparation of high toughness wear-resistant steel castings, can solve the problems of unsatisfactory wear resistance, insufficient toughness reserve, insufficient hardenability, etc., to achieve improved toughness and excellent comprehensive performance , improve the effect of wear resistance

Inactive Publication Date: 2016-11-16
蚌埠市北晨微型机床厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the commonly used low-alloy steel castings have insufficient hardenability and insufficient toughness reserve, and at the same time, the wear resistance still cannot meet the requirements under some special conditions.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A method for preparing a high-toughness wear-resistant steel casting proposed by the present invention comprises the following steps:

[0028] S1. Melting: Add steel scrap, pig iron, sponge iron, ferrochrome, ferromanganese, ferromolybdenum, ferroboron, ferrovanadium, aluminum ingots, zirconium ingots and niobium ingots into the high-frequency induction melting furnace, and heat up to 1500°C. After heat preservation until melting is complete, add smelting additives of 1% of the total weight of the smelting raw materials. The smelting additives include by weight: 30 parts of sodium borate, 15 parts of sodium fluorosilicate, 5 parts of sodium carbonate, 15 parts of sodium chloride, lanthanum carbonate 5 parts, 5 parts of lithium oxide and 0.5 part of titanium dioxide, simultaneously feed a mixed inert gas of argon and helium with a ventilation flow rate of 8L / min into the high-frequency induction furnace, let it stand after ventilation for 20min, and remove slag to obtain ...

Embodiment 2

[0033] A method for preparing a high-toughness wear-resistant steel casting proposed by the present invention comprises the following steps:

[0034] S1. Melting: Add steel scrap, pig iron, sponge iron, ferrochrome, ferromanganese, ferromolybdenum, ferroboron, ferrovanadium, aluminum ingots, zirconium ingots and niobium ingots into the high-frequency induction melting furnace, and heat up to 1560°C. After heat preservation until complete melting, 0.5% of the total weight of the smelting raw materials is added to the smelting additive. The smelting additive includes by weight: 40 parts of sodium borate, 10 parts of sodium fluorosilicate, 10 parts of sodium carbonate, 10 parts of sodium chloride, cerium carbonate 10 parts, 1 part of lithium oxide and 2 parts of titanium dioxide, simultaneously feed a mixed inert gas of argon and helium with a ventilation flow rate of 5 L / min into the high-frequency induction furnace, let stand after ventilation for 35 minutes, and remove slag to ...

Embodiment 3

[0039] A method for preparing a high-toughness wear-resistant steel casting proposed by the present invention comprises the following steps:

[0040] S1. Melting: Add steel scrap, pig iron, sponge iron, ferrochrome, ferromanganese, ferromolybdenum, ferroboron, ferrovanadium, aluminum ingots, zirconium ingots and niobium ingots into the high frequency induction melting furnace and heat up to 1530°C. After heat preservation until the melting is complete, 0.8% of the total weight of the smelting raw materials is added to the smelting additive. The smelting additive includes by weight: 35 parts of sodium borate, 12 parts of sodium fluorosilicate, 7 parts of sodium carbonate, 13 parts of sodium chloride, praseodymium carbonate 7 parts, 3 parts of lithium oxide and 1 part of titanium dioxide, simultaneously feed a mixed inert gas of argon and helium with a ventilation flow rate of 6L / min into the high-frequency induction furnace, let stand after ventilation for 30min, and remove slag...

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Abstract

The invention discloses a preparation method of a high-toughness wear-resistant steel casting. The preparation method comprises the following steps: raw materials are added to a smelting furnace, a smelting additive, which comprises sodium borate, sodium fluosilicate, sodium carbonate, sodium chloride, rare earth carbonate, lithium oxide and titanium dioxide, is added, an inert gas mixture of an argon gas and a helium gas is supplied, and matrix alloy liquid is obtained; the component contents of the matrix alloy liquid are detected, and the components comprise C, Si, Cr, Mn, Mo, B, Al, V, Zr, Nb, S, P, the balance Fe and unavoidable impurities; a modificator, which comprises silicon carbide, boron nitride, tungsten oxide, silicon dioxide, molybdenum metal and magnesium metal, is added to the matrix alloy liquid, and a cast steel blank is obtained by casting; and the cast steel blank is subjected to heat treatment, and the high-toughness wear-resistant steel casting is obtained. The steel casting obtained by the preparation method has good wear resistance, the hardness can reach above 70HRC, and the impact toughness can reach 15J / cm<2>.

Description

technical field [0001] The invention relates to the technical field of castings, in particular to a preparation method of a high-toughness wear-resistant steel casting. Background technique [0002] The variety, output and quality of steel materials are one of the most important symbols of a country's industrial development level and the material guarantee for the sustained and stable development of the national economy. Therefore, greatly improving the quality of steel products and researching and developing high-performance steel materials have important strategic significance for accelerating my country's transformation from a big country in the steel industry to a powerful country in the steel industry, and are also in line with the sustainable development strategy of the national economy in the 21st century. With the rapid development of my country's iron and steel industry, steel output continues to rise. After my country's steel output exceeded 100 million tons for th...

Claims

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Application Information

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IPC IPC(8): C22C38/18C22C38/02C22C38/04C22C38/12C22C38/06C22C38/14C22C33/06C22C37/04C22C37/10C22C37/06C22C33/08C21D1/74C21D1/78
CPCC21D1/74C21D1/78C22C33/06C22C33/08C22C37/04C22C37/06C22C37/10C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14C22C38/18C22C38/32
Inventor 吴延贵
Owner 蚌埠市北晨微型机床厂
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