Metal dusting resistant product

A technology of metal ash and products, applied in the structural field of components, can solve problems such as short-term effects

Inactive Publication Date: 2006-10-04
SANDVIK INTELLECTUAL PROPERTY AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0020] In particular, the above-mentioned solutions characterized by thin coatings on load-resistant components or structural materials suffer from fugitive problems, which differ substantially from this solution in this particular aspect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] Static laboratory experiments were carried out in a tube furnace with a strong coking atmosphere. The metal graying resistance of standard quality stainless steel and the Cu-based alloys A to M of the present invention was tested and evaluated. Table 1 shows the chemical composition of the materials studied, and Table 2 shows the composition of Embodiments A to Q of the present invention. All contents are given in % by weight.

[0079] Case number

[0080] Al

[0081] Test samples were cut from plates or rods into cuboids with dimensions of approximately 10 x 12 x 3 mm and ground with a 600 mesh sieve. Some test samples passed 1.8MHNO at 50°C for 8-40min 3 +1.6M HF standard pickling operation, or electropolishing operation (50g CrO 3 +450ml orthophosphoric acid, 20V) for surface treatment. Samples were cleaned with acetone and placed in a cold furnace prior to testing. In order to achieve a low oxygen partial pressure, the kiln was flushed w...

Embodiment 2

[0086] Alloys of Examples B-O, having the compositions of Table 2, were prepared by melting under an argon atmosphere followed by casting.

[0087] When exposed to an oxidizing atmosphere in the temperature range of 300 °C to 1050 °C, these alloys can form protective alumina or mixed aluminum oxides, which inhibits further oxidation of the alloy and inhibits the evaporation of copper in the alloy, so that the alloy is resistant to Material loss caused by copper evaporation is more resistant. This is illustrated in Table 4, which shows the average weight change per hour (g / (m 2 h)), it can be seen that the difference between the different alloys at 450°C and 550°C is very small.

[0088] Alloy D is significantly less oxidized than other alloys at higher temperatures. The oxides formed on Alloy E flake off easily during cooling from 850°C. attached image 3 The graph shows the superior oxidation resistance of Alloys B, L and N at 850°C. The results show that for the alloy t...

Embodiment 3

[0092] Alloy Example Q, having the composition of Table 2, was prepared by melting under an argon atmosphere followed by casting. The alloy was exposed to CO gas at 600 °C and 230 mbar for 465 h. CO gas is originally composed of isotopes 13 C and 18 CO molecules and isotopes composed of O 12 C and 16 A mixture of CO molecules composed of O. by determination 13 C 18 O and 12 C 16 O to 13 C 16 O and 12 C 18 The conversion rate of O can determine the catalytic activity of the alloy for CO breakdown and recombination. Decomposition reactions are considered to be important as the first step in any metal ashing, carburizing and coking process. attached Figure 4 Shown is the measured by mass spectrometry, in the presence of alloy Q 13 C 18 O and 12 C 16 O conversion. For comparison, with Figure 5 Shown is the conversion of the same gas in an empty furnace. The kiln material is silica. There was no significant difference between the catalytic activity of Alloy ...

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Abstract

A product is disclosed which is resistant or immune to carburization, metal dusting, coking, oxidation, and has sufficient mechanical strength for use at temperatures greater than 400 DEG C. The product consist of a load-bearing member and a corrosion resistant member, wherein the corrosion resistant member is a Cu-Al-alloy comprising Si. Furthermore, the use of the product in CO-containing atmospheres, and/or hydrocarbon containing atmospheres or solid carbon containing processes is disclosed, as well as a method of resisting carburization, metal dusting, coking and oxidation.

Description

field of invention [0001] The present invention relates to resistance or immunity to carburization, metal dusting and coking, and resistance to oxidation, and furthermore, sufficient mechanical strength for use at temperatures above 400°C and high pressure, and capable of A product that maintains resistance or immunity to the above forms of corrosion for a longer period of time. The invention also relates to the use of said product in the construction of components in a CO-containing atmosphere and / or a hydrocarbon-containing atmosphere or in a process containing solid carbon. Background of the invention [0002] Over the past few years, the development of reforming processes in the petrochemical industry has led to significant improvements in process efficiency. An example is the development of large pore zeolite catalysts, which are doped with specific metals, resulting in high selectivity of the catalyst, which makes it suitable for precise reforming and / or one-synthesis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/01C10G75/00B32B15/18B32B15/20C10G9/14C10G9/20C10G35/00C22CC22C9/10F16L9/02F16L9/16
CPCB32B15/01C22C9/01F16L9/02F16L9/165Y02E20/18C10G9/203Y10T428/12924Y10T428/12757Y10T428/1291Y10T428/12903Y10T428/12917
Inventor 马茨·伦德贝里约翰·赫恩布鲁姆肯尼斯·约兰松彼得·绍卡洛什
Owner SANDVIK INTELLECTUAL PROPERTY AB
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