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(Ti,W)Cp/Fe in-situ composite bimetal positioning fusion process and product

An in-situ composite material and bimetal technology, applied in the field of metallurgy, can solve the problems of cemented carbide particles falling off, and achieve the effects of low production cost, enhanced strength, reduced process difficulty and production cost

Active Publication Date: 2019-03-22
山东恒森特种装备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in further practice, it was gradually found that some cemented carbide particles would still fall off in the products using this scheme, so it needs further improvement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Using the above-mentioned (Ti, W) Cp / Fe in-situ composite bimetal positioning fusion process to produce tamping picks for railway tamping equipment, the matrix composition is alloy cast steel material, reinforcing element titanium tungsten carbide, active element particles Cr, Mo, Cu and homogenizer are mixed to form particles with a size similar to that of lost foam beads, molded with cold glue, and placed at the top of the working part of the tamping pick mold. The matrix molten steel is poured, the pouring temperature is 1650 degrees, the compound titanium tungsten carbide is formed in situ, the microhardness is 2.795GPa; the quenching temperature is 850 degrees air cooling, and the hardness of the working part of the hammer head of the tamping pick is HRC66. The upper shape of the tamping pick is a cylinder, the wear-resistant composite layer is 50mm*35mm*130mm, and the total weight is 13.5 kg.

[0058] The working object of the tamping pick is granite stone, and th...

Embodiment 2

[0060] The above-mentioned (Ti, W) Cp / Fe in-situ composite material bimetal positioning fusion process is used to produce the conjoined crusher hammer head. The matrix composition is alloy cast steel material, the reinforcing element titanium tungsten carbide, the active element chromium, copper, molybdenum and Homogenizer etc. are mixed and prefabricated into a granular structure similar to the size of lost foam beads, molded with cold glue, and placed in the working part of the hammerhead mold. The molten steel of the matrix is ​​poured, the pouring temperature is 1600 degrees, and the (Ti, W) C in situ fusion material is generated, wherein the (Ti, W) C Mohs hardness is 9.5, the microhardness is 2.795GPa, the tensile strength is 514Mpa, and the impact toughness is 2.8 J / cm 2 , Bending strength: N / cm 2 1150; quenching temperature is 850 degrees air cooling, the hardness of the working part of the hammer head is HRC65. The total weight of the hammer head is 9.5 kg, the sha...

Embodiment 3

[0063] The above-mentioned (Ti, W) Cp / Fe in-situ composite material bimetal positioning fusion process is used to produce the hammer head of the mine large-scale crusher. The matrix composition is alloy cast steel material, and the reinforcing elements are titanium carbide, tungsten, chromium, copper, molybdenum, and homogenizer. Equally mixed and prefabricated into a granular structure similar to the size of the lost foam beads, molded with cold glue, placed in the working part of the large hammer head mold, poured the matrix molten steel, and the pouring temperature is 1600 degrees to generate (Ti, W)C raw Bit fusion material, in which (Ti, W)C Mohs hardness is 9.5, microhardness is 2.795GPa, tensile strength is 514Mpa, impact toughness is 2.8J / cm 2 , Bending strength: N / cm 2 1150; quenching temperature 850 degrees air cooling. The shape of the hammer head is fan-shaped body 360mm*100mm*500mm, the wear-resistant composite layer is 360mm*100mm*80mm, and the total weight is 9...

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Abstract

The invention discloses a (Ti,W)Cp / Fe in-situ composite bimetal positioning fusion process. The (Ti,W)Cp / Fe in-situ composite bimetal positioning fusion process comprises the steps that a hard phase particle (Ti,W)C and active element particles Cr, Mo, Cu are mixed with cold glue to form pellets which are then pressed into a pre-formed block to be placed at a designated position; in a negative pressure environment, base material molten steel after smelting treatment is poured into the pre-formed block, and the pouring temperature is 1600-1650DEG C; and the pouring is completed, and a (Ti,W)Cp / Fe in-situ composite is formed by quenching after solidification. The mass ratio of the hard phase particle (Ti,W)C to the base material alloy molten steel is 5 to 30%, and the density ratio of the hard phase particle (Ti,W)C to iron-based metal liquid is 0.9 to 1.1. The (Ti,W)Cp / Fe in-situ composite bimetal positioning fusion process strengthens the metallurgical bond between the hard phase and the base material through the in-situ fusion of the (Ti,W)C particle, the active elements and the base material, avoids the falling and separation of the hard phase, enhances the uniform distribution of the particles, enhances the strength, toughness and wear resistance of a product in a positioning enhancement zone, improves the product adaptation range and prolongs the service life, and reduces the process difficulty and production cost.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a (Ti, W) Cp / Fe in-situ composite bimetal positioning fusion process and product. Background technique [0002] Composite materials are known as new engineering materials in the 21st century. Metal-based particle-reinforced composite materials are characterized by their unique high specific strength, high specific modulus, low thermal expansion, heat resistance, wear resistance, electrical conduction, heat conduction, flame retardancy, and no release during use. Gas and other excellent comprehensive properties and development prospects, has become an important branch of composite materials. [0003] The research on metal matrix composites is currently mainly focused on the basic aspects of lightweight materials, but the research and application of steel matrix composites widely used in production is still in the preliminary exploration stage, mainly under laboratory conditions...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/04C22C38/28C22C38/22C22C38/20B22D19/14
CPCB22D19/14C22C33/04C22C38/20C22C38/22C22C38/28
Inventor 孙岗
Owner 山东恒森特种装备有限公司
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