High-temperature resistant high-strength alloy steel and thermal treatment process thereof

A high-strength, alloy steel technology, applied in the field of alloy steel, can solve the problems of easy breaking and deformation of parts, high replacement frequency, weak toughness, etc.

Inactive Publication Date: 2019-01-08
山东雨辰知识产权有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing alloy steel cannot meet the needs of production due to its high carbon content and weak toughness. The parts are easy to break and deform, and the replacement frequency is high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A high-temperature-resistant high-strength alloy steel, including the following raw materials in weight percentages: 0.02% carbon, 3% aluminum, 0.1% thallium, 0.03% rubidium, 0.1% tin, 0.05% niobium, 0.1% lithium, 5% titanium, gypsum crystal 10% beard, 10% yttrium oxide, 6% tungsten carbide powder, and the rest iron.

[0024] A heat treatment process for high-temperature-resistant high-strength alloy steel, comprising the following steps: (1) After mixing the raw materials evenly, heating to 800°C, keeping the temperature for 2 hours, and then quenching in oil liquid; (2) Heating to 900°C, keep warm for 3 hours, then quench in oil liquid; (3) heat to 700°C, keep warm for 3 hours, then cool with circulating cold water, the cooling time is 5 minutes; (4) heat to 700°C, and After 2 hours of heat preservation, cool with circulating cold water for 3 minutes; (5) Heat to 400°C, keep heat for 1 hour and then cool naturally.

Embodiment 2

[0026] A high-temperature-resistant high-strength alloy steel, including the following raw materials in weight percentages: 0.05% carbon, 6% aluminum, 0.5% thallium, 0.08% rubidium, 0.4% tin, 0.1% niobium, 0.5% lithium, 12% titanium, gypsum crystal 15% beard, 18% yttrium oxide, 11% tungsten carbide powder, and the rest iron.

[0027] A heat treatment process for high-temperature-resistant high-strength alloy steel, comprising the following steps: (1) After mixing the raw materials evenly, heating to 900°C, keeping the temperature for 4 hours, and then quenching in oil liquid; (2) Heating to 950°C, and heat it for 5 hours, then quench it in oil liquid; (3) heat it to 750°C, hold it for 5 hours, then cool it with circulating cold water, and the cooling time is 8 minutes; (4) Heat it to 800°C, and After 3 hours of heat preservation, cool with circulating cold water for 7 minutes; (5) Heat to 550°C, keep heat for 2 hours and then cool naturally.

Embodiment 3

[0029] A high-temperature-resistant high-strength alloy steel, including the following raw materials in weight percentages: 0.04% carbon, 4.5% aluminum, 0.3% thallium, 0.05% rubidium, 0.25% tin, 0.08% niobium, 0.3% lithium, 9% titanium, gypsum crystal 13% beard, 15% yttrium oxide, 9% tungsten carbide powder, and the rest is iron.

[0030] A heat treatment process for high-temperature-resistant high-strength alloy steel, comprising the following steps: (1) After mixing all raw materials evenly, heating to 830°C, keeping the temperature for 3 hours, and then quenching in oil liquid. (2) Heat to 925°C and keep it warm for 4 hours, then quench in oily liquid. (3) Heat to 715°C and keep it warm for 4 hours, then cool with circulating cold water for 7 minutes. (4) Heat to 760°C and keep it warm for 2.3 hours, then cool with circulating cold water for 5 minutes. (5) Heat to 450°C, keep warm for 1.6 hours and then cool naturally.

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Abstract

The invention discloses high-temperature resistant high-strength alloy steel and a thermal treatment process thereof. The high-temperature resistant high-strength alloy steel comprises the following raw materials in percentage by weight: 0.02-0.05% of carbon, 3-6% of aluminum, 0.1-0.5% of thallium, 0.03-0.08% of rubidium, 0.1-0.4% of tin, 0.05-0.1% of niobium, 0.1-0.5% of lithium, 5-12% of titanium, 10-15% of gypsum whiskers, 10-18% of yttrium oxide, 6-11% of a tungsten carbide powder and the balance of iron. The high-temperature resistant high-strength alloy steel disclosed by the invention is prepared from carbon, aluminum, thallium, rubidium, tin, niobium, lithium, titanium, gypsum whiskers, yttrium oxide, the tungsten carbide powder and iron through five steps of thermal treatment processes, the obtained high-temperature resistant high-strength alloy steel has the advantages of being high in strength, high in temperature resistance, good in toughness, and the like, is long in service life and capable of well meeting production and use requirements, and in addition, a component made of the steel is not easy to break or deform, and is worthy of popularization.

Description

technical field [0001] The invention relates to an alloy steel, in particular to a high-temperature-resistant high-strength alloy steel and its heat treatment process. Background technique [0002] The main alloying elements of alloy steel are silicon, manganese, chromium, nickel, molybdenum, tungsten, zinc, titanium, niobium, zirconium, cobalt, aluminum, copper, boron, rare earth and so on. There are many types of alloy steel, which are usually divided into low alloy steel, medium alloy steel and high alloy steel according to the content of alloy elements. Parts used in high temperature environments must have high temperature resistance and high strength, so the steel used for parts also requires high temperature resistance and high strength. However, the existing alloy steel cannot meet the needs of production due to its high carbon content and weak toughness. The parts are easy to break and deform, and the replacement frequency is high. Therefore, the present invention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C49/08C22C47/08C21D6/00C22C101/02
CPCC22C49/08C21D6/00C22C47/08
Inventor 周环景
Owner 山东雨辰知识产权有限公司
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