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High-temperature-resisting alloy material for radiant tube and casting process of high-temperature-resisting alloy material

A technology of high temperature resistant alloy and casting process, applied in the direction of burner material specification, gas fuel burner, combustion method, etc., can solve the problems of high cost, insufficient high temperature resistance, low service life, etc. Thermal properties, effect of reducing Ni content

Inactive Publication Date: 2016-04-13
JIANGSU HUAYE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the defects of Cr28Ni48W5 or Cr33Ni50W13 used in the radiant tubes in the prior art, but these steels have insufficient high temperature resistance, low service life and high cost, and provide a high temperature resistant alloy material for radiant tubes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A kind of high-temperature-resistant alloy material for radiant tubes, containing each component of following percentage by weight:

[0034] C0.30%, Cr29.0%, Ni26%, Si2.6%, W3.5%, Mo0.5%, Mn5.9%, Al3%, Ti0.5%, B1.6%, the balance is iron And unavoidable impurities, the content of said impurities is ≤3%.

[0035] The casting process of the high temperature resistant alloy material for the radiant tube includes the following steps:

[0036] 1), weigh raw materials according to the formula;

[0037] 2) The raw materials are smelted together in the furnace; the smelting temperature is 1550°C;

[0038] 3) Casting molding; the casting temperature is 1400°C;

[0039] 4), annealing treatment; preheating at 450°C for 2 hours, then annealing after heating to 900°C, and air cooling at a temperature of 300-350°C with furnace cooling.

Embodiment 2

[0041] A kind of high-temperature-resistant alloy material for radiant tubes, containing each component of following percentage by weight:

[0042] C0.50%, Cr35.0%, Ni30%, Si6.5%, W5.5%, Mo1.5%, Mn2%, Al6%, Ti1.5%, B2.5%, the balance is iron and not Impurities to avoid, the content of said impurities is ≤3%.

[0043] The casting process of the high temperature resistant alloy material for the radiant tube includes the following steps:

[0044] 1), weigh raw materials according to the formula;

[0045] 2) The raw materials are smelted together in the furnace; the smelting temperature is 1650°C;

[0046] 3) Casting molding; the casting temperature is 1500°C;

[0047] 4) Annealing treatment: Preheat at 650°C for 0.5 hours, then anneal after heating to 950°C, and air-cool after furnace cooling at a temperature of 300-350°C.

Embodiment 3

[0049] A kind of high-temperature-resistant alloy material for radiant tubes, containing each component of following percentage by weight:

[0050] C0.30%, Cr30.0%, Ni28%, Si4%, W4%, Mo0.8%, Mn5%, Al4%, Ti0.8%, B1.8%, the balance is iron and unavoidable impurities, The content of the impurity is ≤3%.

[0051]The casting process of the high temperature resistant alloy material for the radiant tube includes the following steps:

[0052] 1), weigh raw materials according to the formula;

[0053] 2) The raw materials are smelted together in the furnace; the smelting temperature is 1600°C;

[0054] 3) Casting molding; the casting temperature is 1450°C; the mold is preheated to 200°C before casting, and the ingot is kept at 900°C for 10 hours after pouring;

[0055] 4), annealing treatment; preheating at 500°C for 1 hour, then annealing after heating to 920°C, and air cooling at a temperature of 300-350°C with furnace cooling.

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PUM

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Abstract

The invention discloses a high-temperature-resisting alloy material. The high-temperature-resisting alloy material comprises, by weight percentage, 0.30%-0.50% of C, 29.0%-35.0% of Cr, 26%-30% of Ni, 2.6%-6.5% of Si, 3.5%-5.5% of W, 0.5%-1.5% of Mo, 2%-5.9% of Mn, 3%-6% of Al, 0.5%-1.5% of Ti, 1.6%-2.5% of B and the balance Fe and inevitable impurities, wherein the content of the impurities is smaller than or equal to 3%. According to the high-temperature-resisting alloy material, a new alloy design thought is adopted, on the basis of Cr-Ni alloy, more Al and Si are added, and heat resistance is improved while tenacity is not lowered; part of Ni is replaced with Mn, on the premise that other alloy elements are controlled, it is guaranteed that the alloy composition phase of the alloy material is austenite and carbide, the content of Ni is lowered remarkably, cost is lowered by 10%, and meanwhile in combination with optimization of process parameters of smelting, casting molding, heat treatment and the like, the strength, oxidative resistance, tenacity and heat resistance of the alloy material are superior to those of a commonly used material in the prior art.

Description

technical field [0001] The invention relates to the fields of high-temperature oxidation resistance and high-temperature corrosion resistance, in particular to a high-temperature-resistant alloy material for a radiant tube and a casting process thereof. Background technique [0002] Industrial kilns usually use gas radiant tubes as heating devices to reduce the infrastructure and operating costs of the kiln, improve production efficiency, and prolong the life of the kiln. The combustion atmosphere and combustion products of the gas radiant tube are not in direct contact with the heated workpiece, which greatly improves the quality of the product. It is currently widely used in the fields of metal heat treatment and industrial drying. [0003] The key component of the radiant tube is the tube body, which radiates the heat released by fuel combustion to the heated material. Because the surface of the pipe body directly contacts the combustion flame and high-temperature flue g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00C21D1/26F23D14/12F23D14/46
CPCC22C30/00C21D1/26C21D2211/001C22C19/055C22C27/06C22C38/06C22C38/34C22C38/44C22C38/50C22C38/54C22C38/58F23D14/12F23D14/46F23D2212/005F23D2212/20
Inventor 王茂庭邹家生王利金严怀民顾敏黄靖雯
Owner JIANGSU HUAYE TECH