Ultra-high temperature electrothermal alloy and preparation method thereof

An electrothermal alloy and ultra-high temperature technology is applied in the field of metal materials, which can solve the problem of high production cost of high temperature heat treatment furnaces, and achieve the effects of good oxidation resistance, creep resistance at high temperature, good winding performance, and easy processing and forming.

Inactive Publication Date: 2010-11-24
BEIJING SHOUGANG GITANE NEW MATERIALS
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Problems solved by technology

[0003] The purpose of the present invention is to provide an ultra-high temperature electrothermal alloy that not only guarantees the performance of the al

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  • Ultra-high temperature electrothermal alloy and preparation method thereof
  • Ultra-high temperature electrothermal alloy and preparation method thereof

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Embodiment Construction

[0015] Table 1 lists some examples in production.

[0016] Table 2 shows the examples of HRE ultra-high temperature electrothermal alloy electroslag remelting slag system. Production practice shows that the rare earth oxide content is less than 15%, and the rare earth content in steel is lower than 0.04%, but when the rare earth oxide content is higher than 70%, the surface of the steel ingot is not smooth, and the surface quality of the steel ingot is not good. Similarly, without cryolite, the surface quality of the steel ingot is not good.

[0017]

[0018]

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Abstract

The invention belongs to the metal material field and relates to an ultra-high temperature electrothermal alloy and a preparation method thereof. The electrothermal alloy comprises the following chemical components in percentage by mass: not more than 0.03% of C, not more than 0.25% of Si, not more than 0.5% of Mn, not more than 0.5% of Ni, not more than 0.01% of S; not more than 0.02% of P, 22-26% of Cr, 5.0-7.0% of Al, 0.04-1% of one or more of La+Ce, Y, Hf and Zr, 0.01-0.5% of Ti, 0.1-0.5% of Nb, 0.2-1.0% of Co and the balance Fe. The alloy has good winding performance, resistivity at 20 DEG C of 1.4-1.55, 650-800MPa of tensile strength and accelerated life at 1400 DEG C of 93h and better oxidation resistance and high-temperature creep resistance, is easy in machine-forming and is mainly used for the electrothermal elements of such furnaces with working temperature of 1200-1300 DEG C as single crystal diffusion furnaces, sintered metal product sintering furnaces, ceramic calcinating furnaces, high-temperature thermal treatment furnaces, etc.

Description

technical field [0001] The invention belongs to the field of metal materials, and relates to an ultra-high temperature electrothermal alloy and a preparation method thereof. Background technique [0002] After more than 50 years of development in my country's electrothermal alloy industry, its smelting, thermal processing, cold processing and heat treatment processes are relatively mature, and there are more and more manufacturers of electrothermal materials. However, as a product category, there are basically no new and better products for ultra-high temperature and high resistance electrothermal alloys, especially electrothermal alloys that can use temperatures above 1300 °C. 0Cr27Al7MO2 is commonly used in China, but because of its high work hardening rate during cold working, it is difficult to form a product, the scrap rate is extremely high, and the waste caused is also great. Therefore, the electric heating wires currently used in China at temperatures above 1300°C m...

Claims

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Application Information

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IPC IPC(8): C22C38/52C22C38/30C22C33/04
Inventor 李刚马国庆陶科李耐松王彦杰
Owner BEIJING SHOUGANG GITANE NEW MATERIALS
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