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Novel casting method for high-chromium cast iron containing CZr powder

A high-chromium cast iron and powder technology, applied in the field of cast iron materials, can solve the problems of layer-by-layer spalling of the casting surface, high-chromium cast iron is easily damaged, and casting wear failure, etc., to improve the density, resist high-temperature friction and wear, and improve hardness and wear resistance

Inactive Publication Date: 2016-06-22
安徽中建材开源新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the high-chromium cast iron produced by the prior art has the following disadvantages in use: under the condition of high-temperature friction, the high-chromium cast iron is easily damaged and cracked, and the surface of the casting is prone to peeling off , resulting in casting wear and failure, so it is very necessary to find a new casting method of high chromium cast iron to solve the problem of high chromium cast iron easy to wear under high temperature friction conditions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A new casting method of high chromium cast iron containing CZr powder, comprising the following steps:

[0022] (1) First take the CZr powder whose average particle size is 20-40 nanometers and account for 5% of the total weight of raw material iron, and place it in the ladle;

[0023] (2) Then take by weight percentage ferromolybdenum, ferrochromium, ferrosilicon, ferronickel, ferrosilicon, put into medium frequency induction furnace and carry out smelting and stirring, and smelting temperature is 1480 ℃;

[0024] (3) Add ferromanganese to carry out deoxidation treatment after all the metal charges are melted, and then carry out slag removal treatment for 2 times to obtain the refined metal liquid;

[0025] (4) Pour the refined metal liquid into the ladle after standing still. The refined metal liquid is poured in twice. For the first time, pour half of the refined metal liquid into the ladle and stir for 15 minutes, and then pour the other half of the refined metal li...

Embodiment 2

[0029] A new casting method of high chromium cast iron containing CZr powder, comprising the following steps:

[0030] (1) First take the CZr powder whose average particle size is 20-40 nanometers and account for 6% of the total weight of raw material iron, and place it in the ladle;

[0031] (2) Then take by weight percentage ferromolybdenum, ferrochromium, ferrosilicon, ferronickel, ferrovanadium, put into medium frequency induction furnace and carry out smelting and stirring, and smelting temperature is 1500 ℃;

[0032] (3) Add ferromanganese to carry out deoxidation treatment after all the metal charges are melted, then carry out slag removal treatment for 3 times to obtain refined metal liquid;

[0033] (4) Pour the refined metal liquid into the ladle after standing still. The refined metal liquid is poured into the ladle twice. For the first time, pour half of the refined metal liquid into the ladle and stir for 20 minutes, and then pour the other half of the refined met...

Embodiment 3

[0037] A new casting method of high chromium cast iron containing CZr powder, comprising the following steps:

[0038] (1) First take the CZr powder whose average particle size is 20-40 nanometers and accounts for 7% of the total weight of raw material iron, and place it in the ladle;

[0039] (2) Then take by weight percentage ferromolybdenum, ferrochromium, ferrosilicon, ferronickel, ferrovanadium, put into medium frequency induction furnace and carry out smelting and stirring, and smelting temperature is 1500 ℃;

[0040] (3) Add ferromanganese to carry out deoxidation treatment after all the metal charges are melted, and then carry out slag removal treatment for 2-3 times to obtain the refined metal liquid;

[0041] (4) Pour the refined metal liquid into the ladle after standing still. The refined metal liquid is poured into the ladle twice. For the first time, pour half of the refined metal liquid into the ladle and stir for 20 minutes, and then pour the other half of the ...

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Abstract

The invention discloses a novel casting method for high-chromium cast iron containing CZr powder. The novel casting method comprises the steps of mixing the CZr powder with scrap iron, placing the mixture into a casting ladle, smelting and stirring ferromolybdenum, ferrochromium, silicon iron, ferronickel and ferrovanadium, carrying out deoxygenation and slagging-off treatment after the raw materials are completely molten, pouring the treated refined molten metal into the casting ladle in batches, stirring the CZr powder and the refined molten metal for being fully mixed, then carrying out casting molding and finally obtaining final products after the high-chromium cast iron containing the CZr powder undergoes heat treatment. According to the method, the cast high-chromium cast iron has the advantages of being resistant to high temperature, friction and abrasion, and the phenomena that the high-chromium cast iron is cracked and the surface of the high-chromium cast iron is peeled off layer by layer in the use process hardly occur. The method is scientific, effective and suitable for being widely popularized in industry.

Description

technical field [0001] The invention relates to the field of cast iron materials, in particular to a novel casting method of high-chromium cast iron containing CZr powder. Background technique [0002] High chromium cast iron is a kind of wear-resistant material with excellent performance and is paid special attention to. It has much higher wear resistance than alloy steel, and much higher toughness and strength than ordinary white cast iron. At the same time, it also has good High temperature resistance and corrosion resistance, combined with convenient production and moderate cost, is known as one of the most excellent anti-abrasive wear materials in contemporary times. In order to meet the requirements of different working conditions, in addition to adjusting the carbon content, other alloying elements, such as nickel, tungsten, molybdenum, etc., are supplemented to form multi-element alloy high-chromium cast iron as the upper part of the shot blasting machine that requir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/10C22C33/08C21D5/00
CPCC22C37/10C21D5/00C22C33/08C22C37/08
Inventor 汪德发张联合徐超汤新明翟建汪礼忠赵文定
Owner 安徽中建材开源新材料科技有限公司
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