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Method for improving wear resistance and heat resistance of steel

A technology of heat resistance and steel, applied in the field of improving the wear resistance and heat resistance of steel, can solve the problems of poor mechanical properties and manufacturability, and achieve the advantages of improving oxidation resistance, high stability, and improving wear resistance and heat resistance. Effect

Active Publication Date: 2018-04-10
马鞍山市恒特重工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the amount of chromium, silicon, and aluminum is added more, the high-temperature oxidation resistance of the steel is good, but if the amount of silicon and aluminum is added too much, the mechanical properties and processability of the steel will be deteriorated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A method for improving the wear resistance and heat resistance of steel, comprising the following steps:

[0017] (1) Adjust the element composition in the steel preparation, calculated according to mass percentage: control the carbon content in the range of 0.24-0.26%, control the silicon content in the range of 0.8-1.0%, control the chromium content in the range of 5.5-6.5%, The manganese content is controlled in the range of 9.5-9.8%, the nickel content is controlled in the range of 1.3-1.6%, the nitrogen content is controlled in the range of 0.26-0.28%, and the rare earth content is controlled in the range of 0.20-0.22%;

[0018] (2) The order of feeding in the smelting process is: pig iron is added first, nickel is added before chromium, and rare earth components are added at the end. Each metal component must be oil-free and rust-free, and each component must be dried before adding. The temperature of the molten steel is controlled at 1650 Between -1680℃ range;

...

Embodiment 2

[0024] A method for improving the wear resistance and heat resistance of steel, comprising the following steps:

[0025] (1) Adjust the element composition in the steel preparation, calculated according to mass percentage: control the carbon content in the range of 0.24-0.26%, control the silicon content in the range of 0.8-1.0%, control the chromium content in the range of 5.5-6.5%, The manganese content is controlled in the range of 9.5-9.8%, the nickel content is controlled in the range of 1.3-1.6%, the nitrogen content is controlled in the range of 0.26-0.28%, and the rare earth content is controlled in the range of 0.20-0.22%;

[0026] (2) The order of feeding in the smelting process is: pig iron is added first, nickel is added before chromium, and rare earth components are added at the end. Each metal component must be oil-free and rust-free, and each component must be dried before adding. The temperature of the molten steel is controlled at 1650 Between -1680℃ range;

...

Embodiment 3

[0032] A method for improving the wear resistance and heat resistance of steel, comprising the following steps:

[0033] (1) Adjust the element composition in the steel preparation, calculated according to mass percentage: control the carbon content in the range of 0.24-0.26%, control the silicon content in the range of 0.8-1.0%, control the chromium content in the range of 5.5-6.5%, The manganese content is controlled in the range of 9.5-9.8%, the nickel content is controlled in the range of 1.3-1.6%, the nitrogen content is controlled in the range of 0.26-0.28%, and the rare earth content is controlled in the range of 0.20-0.22%;

[0034] (2) The order of feeding in the smelting process is: pig iron is added first, nickel is added before chromium, and rare earth components are added at the end. Each metal component must be oil-free and rust-free, and each component must be dried before adding. The temperature of the molten steel is controlled at 1650 Between -1680℃ range;

...

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Abstract

The invention relates to the technical field of mechanical steel machining, and discloses a method for improving wear resistance and heat resistance of steel. The multi-element alloying method is mainly utilized, manganese, nitrogen and the like are used for replacing nickel, the nickel content is reduced, and meanwhile rare earth elements are added; the affinity of the alloy elements with carbonand nitrogen is quite high, carbide and nitride particles which are distributed in a highly dispersed manner and are extremely high in hardness are formed in the alloy smelting process, the stabilityof the particles is quite high, and the particles cannot be completely dissolved even at the temperature of 1,300 DEG C; and the surface treatment technology is further adopted, oxidation resistance of the steel is improved, the highest heat resisting temperature of the heat resisting steel is improved to 1,200 DEG C-1,300 DEG C from original 900 DEG C-1,000 DEG C, and therefore the application field of the heat resisting steel is greatly expanded.

Description

technical field [0001] The invention belongs to the technical field of mechanical steel, and in particular relates to a method for improving the wear resistance and heat resistance of steel. Background technique [0002] Wear-resistant and heat-resistant steel is widely used in electric power, metallurgy, mining, building materials, cement machinery and other industrial sectors, such as boiler burner nozzles in thermal power plants, central cylinders for alumina roasting, thermal equipment in the cement industry, high-temperature oxidation resistance Resilience is an important condition to ensure that the workpiece can work for a long time at high temperature. When steel parts are in an oxidizing environment such as high-temperature air, oxygen reacts with the steel surface to form a variety of iron oxide layers. The oxide layer is very loose, loses the original characteristics of steel, and is easy to fall off. In order to improve the high-temperature oxidation resistance ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/58C21D6/00C21D1/26
CPCC21D1/26C21D6/004C21D6/005C21D6/008C22C38/001C22C38/005C22C38/02C22C38/58
Inventor 聂锋
Owner 马鞍山市恒特重工科技有限公司
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