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Wear and heat resistant alloy steel casting and preparation method thereof

A technology for heat-resistant alloys and steel castings, used in heat treatment equipment, heat treatment furnaces, manufacturing tools, etc., can solve the problems of reduced strength, plasticity and toughness, residual internal stress, and coarse grains of alloy steel castings, and achieve strength improvement. , The effect of improving fluidity and reducing the content of chromium

Inactive Publication Date: 2018-12-04
NINGGUO ZHENGXING WEAR RESISTANT MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the wear resistance and heat resistance of traditional alloy steel castings still cannot meet the requirements under some special conditions. In addition, during the preparation process, there are pores, cracks, shrinkage cavities and shrinkage porosity inside the as-cast steel castings, Casting defects such as coarse grains, uneven structure and residual internal stress greatly reduce the strength, especially the plasticity and toughness of alloy steel castings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A wear-resistant and heat-resistant alloy steel casting, the components and weight percentages are: C: 1.6%, Cr: 2.1%, Mn: 0.5%, Si: 0.2%, Mo: 0.6%, B: 0.03%, Al: 0.06%, V: 0.02%, Zr: 0.01%, Ni: 0.01%, As: 0.009%, S: 0.01%, P: 0.04%, and the balance is iron and unavoidable impurities.

[0027] Preferably, its preparation method comprises the following steps:

[0028] a. Use clean and dry steel scrap, pig iron, ferrochrome, ferromanganese, ferromolybdenum, ferroboron, ferrovanadium, aluminum ingot, zirconium ingot, ferronickel and ferrosulfur arsenic to the furnace for batching;

[0029] b. Put the prepared raw materials into a high-frequency electric furnace, and raise the temperature to 1520°C, keep warm until melting is complete, then add smelting additives, and at the same time, pass a mixed inert gas of argon and helium into the high-frequency induction furnace, After ventilating for 20 minutes, let it stand still, remove the slag, and obtain the alloy liquid;

[...

Embodiment 2

[0035] A wear-resistant and heat-resistant alloy steel casting, the components and weight percentages are: C: 1.8%, Cr: 2.4%, Mn: 0.7%, Si: 0.2%, Mo: 0.6%, B: 0.04%, Al: 0.08%, V: 0.03%, Zr: 0.02%, Ni: 0.01%, As: 0.009%, S: 0.02%, P: 0.04%, and the balance is iron and unavoidable impurities.

[0036] Preferably, its preparation method comprises the following steps:

[0037] a. Use clean and dry steel scrap, pig iron, ferrochrome, ferromanganese, ferromolybdenum, ferroboron, ferrovanadium, aluminum ingot, zirconium ingot, ferronickel and ferrosulfur arsenic to the furnace for batching;

[0038] b. Put the prepared raw materials into a high-frequency electric furnace, and raise the temperature to 1530°C, keep warm until melting is complete, then add smelting additives, and at the same time, pass a mixed inert gas of argon and helium into the high-frequency induction furnace, Stand still after ventilating for 25 minutes, remove slag, and obtain alloy liquid;

[0039] c. After c...

Embodiment 3

[0044] A wear-resistant and heat-resistant alloy steel casting, the components and weight percentages are: C: 1.9%, Cr: 2.7%, Mn: 0.8%, Si: 0.3%, Mo: 0.8%, B: 0.04%, Al: 0.09%, V: 0.04%, Zr: 0.03%, Ni: 0.03%, As: 0.009%, S: 0.03%, P: 0.05%, and the balance is iron and unavoidable impurities.

[0045] Preferably, its preparation method comprises the following steps:

[0046] a. Use clean and dry steel scrap, pig iron, ferrochrome, ferromanganese, ferromolybdenum, ferroboron, ferrovanadium, aluminum ingot, zirconium ingot, ferronickel and ferrosulfur arsenic to the furnace for batching;

[0047] b. Put the prepared raw materials into a high-frequency electric furnace, and raise the temperature to 1550°C, keep warm until melting is complete, then add smelting additives, and at the same time, pass a mixed inert gas of argon and helium into the high-frequency induction furnace, After ventilating for 30 minutes, let it stand still, remove the slag, and obtain the alloy liquid;

[...

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PUM

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Abstract

The invention relates to the technical field of castings, and concretely relates to a wear and heat resistant alloy steel casting and a preparation method thereof. The alloy steel casting comprises 1.6-2.3% of C, 2.1-3.5% of Cr, 0.5-1.2% of Mn, 0.1-0.3% of Si, 0.6-0.8% of Mo, 0.03-0.05% of B, 0.05-0.1% of Al, 0.02-0.04% of V, 0.01-0.03% of Zr, 0.01-0.03% of Ni, 0.008-0.012% of As, 0.01-0.04% of S,0.03-0.06% of P, and the balance of iron and inevitable impurities. Scrap steel, pig iron, ferrochrome, ferromanganese, ferromolybdenum, ferroboron, ferrovanadium, aluminum ingots, zirconium ingots,ferronickel and sulfur-arsenic-iron cooperate with each other as the main materials of the alloy steel casting, so the requirements of wear resistance and high temperature resistance of the alloy casting are met, the chromium content is reduced, and the electrochemical corrosion effect of the alloy is avoided; the added ferrovanadium, aluminum ingots, zirconium ingots, ferronickel and sulfur-arsenic-iron cooperate with each other, so the properties of the steel casting are improved, liquid alloy is deoxidized and denitrified to a certain degree, and the content of the oxides and nitrides in matrix liquid alloy is reduced.

Description

technical field [0001] The invention relates to the technical field of castings, in particular to a wear-resistant and heat-resistant alloy steel casting and a preparation method thereof. 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. Alloy cast steel is alloy steel used in casting state, also known as cast alloy steel. Alloy cast steel is divided into cast alloy structural steel and special-purpose alloy cast steel according to its use. Cast alloy structural steel is mainly used to make general mechanical structural parts, and alloy cast steel for special purposes is mostly high-alloy cast steel, such as wear-resistant cast steel, stainless acid-resistant cast steel, heat-resistant cast steel, cast alloy tool steel, etc. Alloy steel castings are parts made of cast st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/44C22C38/46C22C38/50C22C38/54C22C33/06C21D1/18C21D9/00
CPCC21D1/18C21D9/0081C22C33/06C22C38/002C22C38/02C22C38/04C22C38/06C22C38/44C22C38/46C22C38/50C22C38/54Y02P10/20
Inventor 李根有李骏
Owner NINGGUO ZHENGXING WEAR RESISTANT MATERIALS
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