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High-strength casted air-colled bainite wear-resisting steel and preparing method

A bainite and wear-resistant steel technology, applied in the field of wear-resistant materials, can solve the problems of poor use safety, low plasticity and toughness, etc., and achieve the effects of improved toughness, improved cast steel structure, and low production cost

Inactive Publication Date: 2006-05-24
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this material contains a certain amount of brittle carbides, resulting in low plasticity and toughness of the material, and poor safety in use under high impact conditions.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Cast steel material of the present invention is melted with 1500kg intermediate frequency induction furnace, and its manufacturing process steps are:

[0035] ①Heating and melting ordinary steel scrap, pig iron, ferrochrome and copper plate, adding ferrosilicon and ferromanganese for pre-deoxidation and alloying after molten steel is melted;

[0036] ② After adjusting the composition before the furnace, the temperature is raised to 1650°C, and 0.50% of the weight of molten steel is added for final deoxidation and alloying of aluminum, and then it is released from the furnace;

[0037] ③Crush the composite modifier containing yttrium, boron, titanium, magnesium and zinc into small pieces with a particle size of 18-22mm, and after drying at 240°C, place it at the bottom of the ladle, and use the method of pouring into the ladle to clean the molten steel. Composite metamorphism;

[0038] ④ After the metamorphic treatment, the molten steel is poured into a water glass sand...

Embodiment 2

[0042] Cast steel material of the present invention is melted with 300kg intermediate frequency induction furnace, and its manufacturing process steps are:

[0043] ①Heating and melting ordinary steel scrap, pig iron, ferrochrome and copper plate, adding ferrosilicon and ferromanganese for pre-deoxidation and alloying after molten steel is melted;

[0044] ② After adjusting the ingredients before the furnace, the temperature is raised to 1620°C, and 0.30% of the weight of molten steel is added for final deoxidation and microalloying of aluminum, and then it is released from the furnace;

[0045] ③Crush the composite modifier containing yttrium, boron, titanium, magnesium, calcium and zinc into small pieces with a particle size of 18-20mm, and after drying at 220°C, place it at the bottom of the ladle, and use the method of pouring into the ladle to clean the molten steel. Carry out compound metamorphic treatment;

[0046] ④ After the metamorphic treatment, the molten steel is...

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Abstract

The invention relates to a high strength foundry air cooling bainite wear resistant steel that the chemical constituents is 0.32-0.65 C, 0.8-3.0 Si, 1.2-3.0 Mn, 0.5-0.8 Cr, 0.3-0.8 Cu, 0.001-0.008 B, 0.18-0.35 Al, 0.05-0.15 Y, 0.05-0.20 Ti, 0-0.12 Mg, 0-0.12 Ca, 0-0.15 Zn, and 0.10<Mg+Ca+Zn<0.25, the else is Fe and trace impurities. The process includes the following steps: smelting waste steel, pig iron, ferrochrome iron and copper board, adding ferrosilicon and ferromanganese preliminary deoxidation into melting down and alloying; heating to 1600-1660 degree centigrade after adjusting the constituents adding aluminum deoxidatioin and alloying and blast furnace tapping; putting the compounding modification particle of Yt, boron, titanium, magnesium, calcium, and zinc on the bottom of pouring ladle, taking modification process to the molten steel; molding the molten steel after modification process into normal matrix for casting. The invention could prolong the useful life of antifriction component, improve working efficiency, and have good economic benefit.

Description

technical field [0001] The invention relates to a high-strength cast air-cooled bainite wear-resistant steel and a preparation method thereof, belonging to the technical field of wear-resistant materials. Background technique [0002] Abrasive wear is one of the main forms of metal material consumption by wearing parts in industries such as electric power, transportation, mining, metallurgy, machinery, chemical industry, petroleum, military industry and aerospace. How to improve the wear resistance of wear-resistant materials, prolong their service life and reduce costs is an urgent problem to be solved by the production and use departments of wear-resistant materials. Due to the simple production process and superior comprehensive mechanical properties of air-cooled bainitic steel, it has become a new type of wear-resistant steel and is widely used in wear-resistant fields such as electric power, transportation, mining, metallurgy, and machinery. Japanese patent JP11152520...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/28B22D37/00C22C33/04
Inventor 匡加才符寒光张世英叶昌刘其城符慧林
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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