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Low-nickel austenite gas valve alloy and preparation method thereof

An austenitic and gas valve technology, which is applied in the field of low-nickel austenitic gas valve alloy and its preparation, can solve the problems that materials cannot meet the needs, etc., and achieve high-temperature long-term service performance, high-temperature oxidation resistance and corrosion resistance Performance, the effect of improving high temperature oxidation resistance

Inactive Publication Date: 2015-06-24
JIANGSU SHENYUAN SPECIAL STEEL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a low-nickel austenitic gas valve alloy, in order to obtain a gas valve with excellent comprehensive performance and relatively cheap price, and solve the problem that the materials in the prior art cannot meet the needs

Method used

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  • Low-nickel austenite gas valve alloy and preparation method thereof
  • Low-nickel austenite gas valve alloy and preparation method thereof
  • Low-nickel austenite gas valve alloy and preparation method thereof

Examples

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Effect test

Embodiment 1

[0037] Example 1, a low-nickel austenitic gas valve alloy, the chemical composition is based on weight percentage, containing Ni: 31%, Cr: 14%, C: 0.04%, Al: 2%, Ti: 2.6%, W: 0.1 %, Mo: 0.7%, Nb: 0.7%, Cu: 0.1%, Y: 0.15%, Hf: 0.14%, B: 0.003%, Mn: 0.3%, Si: 0.1%, S≤0.02%, P≤0.02 %, O ≤ 0.02%, N ≤ 0.02%, the balance is Fe and unavoidable impurities, the impurity content ≤ 0.3%.

Embodiment 2

[0038] Example 2, a low-nickel austenitic gas valve alloy, the chemical composition is based on weight percentage, containing Ni: 29%, Cr: 15%, C: 0.03%, Al: 1.8%, Ti: 2.7%, W: 0.5% %, Mo: 0.6%, Nb: 0.5%, Cu: 0.2%, Y: 0.13%, Hf: 0.12%, B: 0.002%, Mn: 0.3%, Si: 0.2%, S≤0.02%, P≤0.02 %, O ≤ 0.02%, N ≤ 0.02%, the balance is Fe and unavoidable impurities, the impurity content ≤ 0.3%.

Embodiment 3

[0039] Example 3, a low-nickel austenitic gas valve alloy, the chemical composition is based on weight percentage, containing Ni: 35%, Cr: 17%, C: 0.06%, Al: 2.1%, Ti: 3.0%, W: 0.3 %, Mo: 0.4%, Nb: 0.6%, Cu: 0.1%, Y: 0.12%, Hf: 0.13%, B: 0.003%, Mn: 0.2%, Si: 0.2%, S≤0.02%, P≤0.02 %, O ≤ 0.02%, N ≤ 0.02%, the balance is Fe and unavoidable impurities, the impurity content ≤ 0.3%.

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Abstract

The invention discloses low-nickel austenite gas valve alloy and a preparation method thereof. The low-nickel austenite gas valve alloy comprises the following ingredients in percentage by weight: 0.02-0.08% of C, 28.0-35.0% of Ni, 12.0-17.0% of Cr, 1.5-2.5% of Al, 2.5-3.5% of Ti, 0.4-1.02% of W and Mo, 0.3-0.9% of Nb and Cu, 0.05-0.2% of Y, 0.05-0.3% of Hf, 0.001-0.005% of B, smaller than or equal to 0.4% of Mn, smaller than or equal to 0.3% of Si, smaller than or equal to 0.02% of S, smaller than or equal to 0.02% of P, smaller than or equal to 0.02% of O, smaller than or equal to 0,02% of N and the balanced Fe and unavoidable impurities. Cu is smaller than or equal to 0.3%. The alloy has the advantages of high strength, excellent corrosion resisting property and good high-temperature performance.

Description

technical field [0001] The invention relates to a metal material and a preparation method thereof, in particular to a low-nickel austenitic gas valve alloy and a preparation method thereof. Background technique [0002] Internal combustion engines include gasoline engines and diesel engines, which are mainly used in automobiles, motorcycles, tractors, ships, diesel locomotives, tanks, oil drilling rigs, construction machinery, mobile power stations, etc., and play an important role in the national economy. important parts. The development and production of valve steel for internal combustion engines in my country develops along with the continuous innovation of internal combustion engines. Over the past few decades, the continuous improvement of internal combustion engine parameters has led to an increase in the operating temperature of the valve steel, increased stress, severe gas corrosion, accelerated wear of the valve cone surface, and increasingly harsh operating condi...

Claims

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Application Information

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IPC IPC(8): C22C38/54
Inventor 朱治愿宫友军益帼郑传波张国付沈国平张竞涂玉国翟德建魏伟
Owner JIANGSU SHENYUAN SPECIAL STEEL
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