Refractory Cr-base alloy

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

Inactive Publication Date: 2003-01-15
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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Examples

Experimental program
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Effect test

Embodiment Construction

[0027] According to the chemical composition and production method described in the present invention, five heats of chromium-based superalloys were smelted on an induction furnace. Its specific chemical composition is shown in Table 1. After smelting, the five heats of alloys were made into parts according to specific processes, samples were taken at the same time, and high-temperature compression tests, high-temperature oxidation resistance tests and vulcanization tests were carried out respectively. The results are listed in Table 2 and Table 3 respectively.

[0028] For comparison, a furnace of cobalt-based alloy PGUMCo-50 was smelted under the same process conditions. The same test items were also carried out respectively. Its chemical composition and various test results are also listed in the corresponding Table 1, Table 2 and Table 3 respectively.

[0029] The compression test is carried out on a high temperature compression testing machine. Sample diameter is φ30mm...

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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 components of a heating furnace. Background technique [0002] At present, the walking beam heating furnace has become the mainstream heating equipment for steel billet heating before rolling in the rolling mills of industrialized countries. The heat-resistant pad (Skid button) protruding upward on the furnace bottom support beam in this type of furnace is the key component of the heating furnace. They work under the harsh working conditions of ultra-high temperature of 1300-1450 ℃ and oxidation-sulfurization atmosphere, and play the role of supporting and transferring the heated billet. [0003] In the prior art, cobalt-based superalloys are generally used to manufacture heat-resistant pads, such as PGUMCO--50 ("COBALT" 1973.3) and KHP-40CM (JP-A-52-20319). As we all know, the biggest disadvantage of cobalt-based superalloys is that the high-temperatur...

Claims

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Application Information

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