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A kind of high anti-creep and anti-corrosion material and the method for using the material to prepare shelling hammer head

A technology of shelling hammer and corrosion-resistant materials, which is applied in the field of aluminum smelting, can solve the problems of high price, high price, insufficient electrochemical corrosion resistance and impact resistance, and achieve high labor intensity, high hardness and short service life Effect

Active Publication Date: 2021-01-05
JIUQUAN IRON & STEEL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In terms of material research, a high-component tungsten carbide 50%-70% + titanium carbide 5%-10% material has been developed. Although it has high wear resistance, it has insufficient electrochemical corrosion resistance and impact resistance, and the price is relatively high.
Foreign SNW209 brand materials contain 0.20-0.3% carbon, 19-21% chromium, 8.0-10% nickel, and 2.0-2.6% tungsten; they have a long service life, but are expensive, and the material technology is monopolized by foreign companies. There are technologies that cannot solve the above technical problems

Method used

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  • A kind of high anti-creep and anti-corrosion material and the method for using the material to prepare shelling hammer head

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1: A high creep and corrosion resistant material, comprising the following components by weight percentage: C 0.24%, Cr 24%, Ni 10.7%, Mn 1.5%, W 2.6%, Si 1.0%, B 0.002%, P 0.04%, S 0.008%, and the balance is Fe.

[0030] A kind of method that utilizes high anti-creep anti-corrosion material to prepare shelling hammer head, comprises the following steps:

[0031] The first step: smelting, using the AOD refining method to smelt high creep and corrosion resistant materials.

[0032] The second step: producing steel ingots, casting the molten steel that has been smelted through billet continuous casting machines or producing billet steel ingots by die casting, and the cross-sectional size of the billet steel ingots is 250mm, and the weight of the steel ingots is 351.5Kg.

[0033] Step 3: Forging. During forging, the initial forging temperature is 1260°C during forging, and the temperature during forging is lower than 850°C. It should be heated in time. Two-stage ...

Embodiment 2

[0038] Example 2: A high creep and corrosion resistant material, comprising the following components by weight percentage: C 0.18%, Cr 23%, Ni 12%, Mn 1.0%, W 1.8%, Si 1.2%, B 0.001%, P 0.03%, S 0.01%, and the balance is Fe.

[0039] A kind of method that utilizes high anti-creep anti-corrosion material to prepare shelling hammer head, comprises the following steps:

[0040] The first step: smelting, using the AOD refining method to smelt high creep and corrosion resistant materials.

[0041] The second step: producing steel ingots, casting the molten steel that has been smelted through billet continuous casting machines or producing billet steel ingots by die casting, and the cross-sectional size of the billet steel ingots is 160mm, and the weight of the steel ingots is 296Kg.

[0042] Step 3: Forging. During forging, the initial forging temperature is 1255°C during forging, and the temperature during forging is lower than 850°C. It should be heated in time. The two-stage for...

Embodiment 3

[0047] Embodiment 3: A kind of high anti-creep anti-corrosion material, comprises following composition by weight percentage: C 0.29%, Cr 25%, Ni 9.5%, Mn 2.0%, W 3.4%, Si 0.7%, B 0.004%, P 0.025%, S 0.006%, and the balance is Fe.

[0048] A kind of method that utilizes high anti-creep anti-corrosion material to prepare shelling hammer head, comprises the following steps:

[0049] The first step: smelting, using the AOD refining method to smelt and smelt high creep and corrosion resistant materials.

[0050] The second step: producing steel ingots, casting the molten steel that has been smelted through billet continuous casting machines or producing billet steel ingots by die casting, and the cross-sectional size of the billet steel ingots is 360 mm, and the weight of the steel ingots is 407 Kg.

[0051] The third step: hot rolling, the initial rolling temperature is 1300 ° C, the final rolling temperature is 1000 ° C, hot rolling to a bar with a cross-sectional size of 90 mm...

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Abstract

The invention belongs to the technical field of aluminum smelting and discloses a tungsten-contained high-creep-resistant corrosion-resistant material and a method for preparing a hammer head throughthe material so as to solve problems in the material of a crust breaking hammer head in the prior art. The tungsten-contained high-creep-resistant corrosion-resistant material comprises the followingingredients of, in percentage by weight, 0.18-0.29% of C, 23-25% of Cr, 9.5-12% of Ni, 1-2% of Mn, 1.8-3.4% of W, 0.7-1.2% of Si, 0.001-0.04% of B, less than or equal to 0.05% of P, less than or equalto 0.01% of S and the balance Fe. The crust breaking hammer head is made through the steps of smelting, steel ingot production, forging or hot rolling, segmenting, heat treatment, mechanical machining and forming and the like through the material. A Cr-Ni type austenite stainless steel substrate with high temperature resistance and electrochemistry corrosion resistance is formed in cooperation with a traditional austenite stainless steel production process; and meanwhile, due to existence of the tungsten element, the tungsten carbide precipitated phase enters the austenite stainless steel substrate so that tungsten carbide precipitated phase frameworks with high creep resistance and high wear resistance can be formed and distributed in the material of the crust breaking hammer head in a dispersed manner, and the hardness, high creep resistance and high wear resistance of the material of the crust breaking hammer head are remarkably improved.

Description

technical field [0001] The invention relates to the technical field of aluminum smelting, in particular to a method for preparing hammerheads from high creep and corrosion resistant materials. Background technique [0002] At present, the central point-type blanking pre-baked aluminum electrolytic cell is the main equipment for aluminum electrolytic production. One of the important structures of the central point-type feeding pre-baking tank is the shelling and feeding system. As the working part of the shelling and feeding system-the shelling hammer, in the actual working conditions, it works frequently for a long time in the environment of strong magnetic field, high temperature, strong current, and high corrosive medium, and the average time interval of shelling action is 68 seconds. When cracking the shell, it impacts and rubs against the surface of the electrolyte shell, and soaks in the electrolyte up to 930°C (±5°C) for 2-3 seconds each time. At the same time, due t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/04C22C38/58C22C38/44C22C38/02C22C38/54B23P15/00C21D6/00C25C3/14
CPCB23P15/00C21D6/004C21D6/005C21D6/008C22C38/02C22C38/04C22C38/44C22C38/54C22C38/58C25C3/14
Inventor 何成善刘国平
Owner JIUQUAN IRON & STEEL GRP
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