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Refractory Cr-base alloy

A technology of superalloy and chemical composition, applied in the field of high temperature parts of heating furnace, can solve the problems of poor oxidation resistance, low limit height, low high temperature strength, etc., and achieve the effect of stable structure, excellent high temperature strength and oxidation resistance

Inactive Publication Date: 2004-05-26
马华政
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Problems solved by technology

As we all know, the biggest disadvantage of cobalt-based superalloys is that the high-temperature strength above 1250°C is too low and the oxidation resistance is extremely poor. Therefore, the limit height of heat-resistant pads made of cobalt-based alloys is low, usually only 100 ~120mm or less

Method used

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Embodiment Construction

[0026] According to the chemical composition and production method of the present invention, 5 furnaces of chromium-based superalloys are smelted on an induction furnace. Its specific chemical composition is shown in Table 1. After smelting, the alloys of the 5 furnaces were all made into parts according to a specific process, and samples were taken at the same time, and the high temperature compression test, high temperature oxidation test and vulcanization test were carried out respectively. The results are listed in Table 2 and Table 3.

[0027] For comparison, a furnace of cobalt-based alloy PGUMCo-50 alloy was smelted under the same process conditions. The same test items were also carried out separately. Its chemical composition and various test results are also listed in the corresponding Table 1, Table 2 and Table 3.

[0028] The compression test is carried out on a high-temperature compression testing machine. The diameter of the sample is φ30mm, and the height is h 1 It ...

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Abstract

A high-temp Cr-base alloy used for refractory parts of heater contains C (0.01-0.5 wt.%), Si (0-2), Mn (0-2), W (10.1-18), Fe (10.1-30), Mo (0-3), Al (0-2), Ti (0-1.5) and Cr (rest). Its advantages are high smelting point, stable microscopic structure, and excellent high-temp strength and resistance to oxidation and hot corrosion.

Description

Technical field [0001] The invention belongs to the field of chromium-based alloys, and mainly relates to high-temperature parts of a heating furnace. Background technique [0002] At present, walking beam heating furnaces have become the mainstream heating equipment for billet heating before rolling in rolling mills in industrialized countries. Skid buttons protruding upward on the bottom support beams in such furnaces are key components of the heating furnace. They work under the extreme high temperature of 1300~1450℃ and the severe working conditions of oxidation-sulfurizing atmosphere, and play the role of supporting and transferring the heated billet. [0003] In the prior art, cobalt-based high-temperature alloys are commonly used to manufacture heat-resistant spacers, such as PGUMCO-50 ("COBALT" 1973.3) and KHP-40CM (Japanese Patent Publication No. 52-20319). As we all know, the biggest disadvantage of cobalt-based superalloys is that the high temperature strength above 12...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C27/06C22C29/06
Inventor 马华政马燕宁
Owner 马华政
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