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High-Cr Ni-contained Fe-B-based liquid-zinc-corrosion-resistant integral material and preparation method thereof

A monolithic material and liquid zinc technology, which is applied in the field of Fe-B-based monolithic materials resistant to liquid zinc corrosion and its preparation, can solve the problems of no barrier effect, unsatisfactory liquid zinc corrosion resistance, and premature failure of materials, and achieve good Good stability, liquid zinc corrosion resistance, and good wear resistance

Active Publication Date: 2015-06-10
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For unalloyed Fe-B alloys, the α-Fe of the matrix is ​​quickly corroded preferentially by the zinc liquid, and the addition of Fe 2 The brittleness of B, which peels off from the substrate under the stress of phase transformation, leading to premature failure of the material
Many studies have confirmed that Cr is the main element to improve the corrosion resistance of liquid zinc. Some studies have added Cr to Fe-B alloys, but the addition of high chromium makes Fe 2 B is no longer continuous and dense, although it improves the corrosion resistance of the matrix and improves the Fe 2 The toughness of B, but without the grid-like Fe 2 The blocking effect of B, its corrosion resistance to liquid zinc is still not ideal

Method used

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  • High-Cr Ni-contained Fe-B-based liquid-zinc-corrosion-resistant integral material and preparation method thereof
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  • High-Cr Ni-contained Fe-B-based liquid-zinc-corrosion-resistant integral material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] A high-Cr Ni-containing Fe-B-based monolithic material resistant to zinc liquid corrosion is composed of the following components by mass percentage:

[0059] Cr 18%, Ni 4%, Mo 1%, B 3.5%, Fe balance.

[0060] Its preparation method is as follows:

[0061] (1) Accurately weigh 2.7g of Cr pellets, 0.6g of Ni block, 0.15g of Mo sheet, 3.088g of ferroboron, and 8.462g of industrial pure iron with an induction balance with an accuracy of 0.1mg, place the ferroboron pellets at the bottom of the crucible, and then place Cr Granules, electrolytic Ni block, Mo sheet and industrial pure iron block are covered on it;

[0062] (2) When smelting for the first time, place the arc on the industrial pure iron block, let the flowing Fe liquid cover the Cr particles, Ni block, Mo sheet and ferroboron, the smelting current is 100A, and then align the tungsten pole with the molten pool In the middle, the current is repeatedly applied several times, alternately at 60A, 80A, and 100A, and...

Embodiment 2

[0068] A high-Cr Ni-containing Fe-B-based monolithic material resistant to zinc liquid corrosion is composed of the following components by mass percentage:

[0069] Cr 18%, Ni 6%, Mo 1%, B 3.5%, Fe balance.

[0070] Its preparation method is as follows:

[0071] (1) Accurately weigh 2.7g of Cr particles, 0.9g of Ni block, 0.15g of Mo sheet, 3.088g of ferroboron, and 8.162g of industrial pure iron block with an induction balance with an accuracy of 0.1mg, place the ferroboron particles at the bottom of the crucible, and then place Cr Granules, electrolytic Ni block, Mo sheet and industrial pure iron block are covered on it;

[0072] (2) When smelting for the first time, place the arc on the industrial pure iron block, let the flowing Fe liquid cover the Cr particles, Ni block, Mo sheet and ferroboron, the smelting current is 100A, and then align the tungsten pole with the molten pool In the middle, the current is repeatedly applied several times, alternately at 60A, 80A, and...

Embodiment 3

[0078] A high-Cr Ni-containing Fe-B-based monolithic material resistant to zinc liquid corrosion is composed of the following components by mass percentage:

[0079] Cr 18%, Ni 10%, Mo 1%, B 3.5%, Fe balance.

[0080] Its preparation method is as follows:

[0081] (1) Accurately weigh 2.7g of Cr particles, 1.5g of Ni block, 0.15g of Mo sheet, 3.088g of ferroboron, 7.562g of industrial pure iron block with an induction balance with a precision of 0.1mg, place the ferroboron particles at the bottom of the crucible, and then place Cr Granules, electrolytic Ni block, Mo sheet and industrial pure iron block are covered on it;

[0082] (2) When smelting for the first time, place the arc on the industrial pure iron block, let the flowing Fe liquid cover the Cr particles, Ni block, Mo sheet and ferroboron, the smelting current is 100A, and then align the tungsten pole with the molten pool In the middle, the current is repeatedly applied several times, alternately at 60A, 80A, and 10...

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Abstract

The invention discloses a high-Cr Ni-contained Fe-B-based liquid-zinc-corrosion-resistant integral material and a preparation method thereof. The high-Cr Ni-contained Fe-B-based liquid-zinc-corrosion-resistant integral material comprises, by mass, 18% of Cr, 4%-14% of Ni, 1%-2% of Mo, 3.5%-3.88% of B and the balance Fe. A photoelectric sensitivity balance with the accuracy being 0.1 mg is used for weighing raw materials, the raw materials are repeatedly smelted more than four times in a WK-I type non-self-consumption tungsten electrode magnetic control vacuum melting furnace, and then alloy is obtained. The alloy has the advantages of being good in liquid zinc corrosion resistance, tenacity, abrasion resistance and the like, and has excellent corrosion resistance and structure stability in actual application.

Description

technical field [0001] The invention relates to a high-temperature alloy preparation technology, in particular to a high-Cr and Ni-containing Fe-B-based monolithic material resistant to zinc liquid corrosion and a preparation method. Background technique [0002] Corrosion of liquid metal has always been a difficult problem for the nuclear industry and the galvanizing industry, and has become a worldwide problem. Especially the equipment components submerged in the liquid metal are strongly corroded and worn by the molten metal, and frequent replacement of equipment not only causes waste of materials, but also causes a lot of economic losses. At present, the overall materials resistant to liquid zinc corrosion mainly include iron-based, cobalt-based, Mo-W series, and ceramic materials. Cobalt-based superalloys are expensive, and ceramics and Mo-W alloy systems are very brittle. Among them, Fe-B alloy has been widely concerned because of its low price and good resistance to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/54C22C33/04
CPCC22C33/04C22C38/44C22C38/54
Inventor 尹付成王朦朦陈国鹏赵满秀李智
Owner XIANGTAN UNIV