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Preparation method of cast-infiltration high-carbon high-chromium manganese-containing wear-resistant composite material

A high-carbon, high-chromium, composite material technology, used in casting molding equipment, molds, mold components, etc., can solve the problems of easy cracking and falling off, high hardness of wear-resistant layers, stable production quality, improved surface hardness, and cost-effective low effect

Active Publication Date: 2015-12-02
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing technology, in the cast infiltration technology, high hardness reinforcement phases other than chromium are added to the preparation of cast infiltration alloy powder or preform. Although the cast infiltration layer has certain wear resistance, the overall material also has certain toughness. , but the hardness of the wear-resistant layer is relatively high, and it is easier to crack and fall off under the condition of impact wear

Method used

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Examples

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preparation example Construction

[0013] A method for preparing a cast-infiltrated high-carbon, high-chromium, manganese-containing wear-resistant composite material, comprising the following steps:

[0014] Step 1. Weigh nitrogen according to the mass ratio percentage of chromium, carbon, manganese, nitrogen and nickel (57~66): (5.5~6.5): (5~15): (0~0.15): (2~5) Manganese powder, high-carbon ferrochromium powder, manganese powder and nickel powder are prepared into alloy powder for later use;

[0015] Step 2: Add 4% polyvinyl butyral and 2% absolute ethanol to the alloy powder prepared in step 1 in turn, mix thoroughly to form a coating, and then apply the coating to the mold cavity Corresponding to the part of the casting that needs to improve the wear resistance, ignite it to make it solidify and use it for later use;

[0016] Step 3: Pour molten steel into the mold at a temperature of 1550-1600°C, and after natural cooling, take out the casting and set aside;

[0017] Step 4: Perform water toughening tre...

Embodiment 1

[0021] A method for preparing a cast-infiltrated high-carbon, high-chromium, manganese-containing wear-resistant composite material, comprising the following steps:

[0022] Step 1. Weigh manganese nitride powder, high-carbon ferrochromium powder, manganese powder and nickel powder according to the ratio of mass and number of chromium, carbon, manganese, nitrogen and nickel to 57:5.5:5:0.15:5 to prepare alloy powder ,spare;

[0023] Step 2: To the alloy powder prepared in step 1, add polyvinyl butyral 4% by mass and 2% absolute ethanol in turn, mix thoroughly to form a coating with a coating thickness of 2-10 mm, and then apply The coating is applied to the part of the casting mold cavity corresponding to the part where the wear resistance is to be improved, and it is ignited to make it solidify before use;

[0024] Step 3: Pour molten steel into the mold at a temperature of 1550°C, and after natural cooling, take out the casting and set aside;

[0025] Step 4: Perform water...

Embodiment 2

[0028] A method for preparing a cast-infiltrated high-carbon, high-chromium, manganese-containing wear-resistant composite material, comprising the following steps:

[0029] Step 1, taking manganese nitride powder, high carbon ferrochrome powder, manganese powder and nickel powder according to the mass ratio percentage of chromium, carbon, manganese, nitrogen and nickel is 66:6.5:15:0.075:5 to prepare alloy powder, spare;

[0030] Step 2: Add 4% polyvinyl butyral and 2% absolute ethanol to the alloy powder prepared in step 1 in turn, mix thoroughly to form a coating, and then apply the coating to the mold cavity Corresponding to the part of the casting that needs to improve the wear resistance, the coating thickness is 2~10mm, and it is ignited to make it solidify before use;

[0031] Step 3: Pour molten steel into the mold at a temperature of 1550-1600°C, and after natural cooling, take out the casting and set aside;

[0032] Step 4: Perform water toughening treatment on th...

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Abstract

Disclosed is a preparation method of a cast-infiltration high-carbon high-chromium manganese-containing wear-resistant composite material. The preparation method includes the steps of firstly, weighing raw materials of chromium, carbon, manganese, nitrogen and nickel according to the mass percent of (57-66) to (5.5-6.5) to (5-15) to (0-0.15) to (2-5); secondly, adding polyvinyl butyral and absolute ethyl alcohol sequentially into alloy powder to mix to form a coating, and then igniting to achieve curing; thirdly, applying the coating to corresponding parts of a cast cavity, pouring molten steel, at the temperature of 1550-1600 DEG C, into the cast cavity, and cooling the molten steel naturally and then stripping castings; fourthly, subjecting the castings to water toughening at the temperature of 900-1000 DEG C to obtain products. By means of manganese adding and follow-up heat treatment processes, a cast-infiltration layer and a matrix are good in metallurgical bonding, the austenitic matrix with an alloy layer containing great quantity of carbide and nitride is produced, and surface hardness of the products is improved.

Description

technical field [0001] The invention relates to the field of preparation of wear-resistant materials, in particular to a method for preparing a cast-infiltrated high-carbon, high-chromium, manganese-containing wear-resistant composite material. Background technique [0002] Coal, metallurgy, mining, electric power, building materials, refractory materials, energy and other industrial industries in modern industry usually use overall high chromium alloys. Due to their high hardness, their impact toughness is insufficient. In the existing technology, in the cast infiltration technology, high hardness reinforcement phases other than chromium are added to the preparation of cast infiltration alloy powder or preform. Although the cast infiltration layer has certain wear resistance, the overall material also has certain toughness. , but the hardness of the wear-resistant layer is relatively high, and it is easier to crack and fall off under the condition of impact wear. Contents...

Claims

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Application Information

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IPC IPC(8): B22C3/00B22D19/08
Inventor 魏世忠郭军力潘昆明李继文徐流杰张国赏王展王晓东王长记
Owner HENAN UNIV OF SCI & TECH
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