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In-situ ceramic partially-reinforced composite material hammerhead for crusher and preparation method

A technology of local reinforcement and composite materials, which is applied in grain processing and other fields, can solve the problems of short life of the hammer head and reduce the operation rate of equipment, and achieve the effects of saving ceramics, avoiding brittle fracture, and good metallurgical bonding effect

Active Publication Date: 2010-12-08
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the short life of the hammer head and the frequent shutdown and replacement, which reduces the operating rate of the equipment, it is necessary to find a new material and new process to improve the performance and service life of the hammer head

Method used

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  • In-situ ceramic partially-reinforced composite material hammerhead for crusher and preparation method
  • In-situ ceramic partially-reinforced composite material hammerhead for crusher and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] It is composed of Ti powder, C powder, Ni powder, Fe powder and Cr powder with a particle size of less than 50 microns, wherein the ratio of Ti powder and C powder is Ti:C=1:1 by molar ratio, and the weight percentage of Ni content is 20-40%, the Fe content is 0-10% by weight, and the Cr content is 0-10% by weight. The mixed reactant powder is put into a ball mill mixer and mixed for 5-8 hours to make it evenly mixed; Then put the reactant powder into the mould, press it into a compact at room temperature, the compaction rate of the compact is 70-80%, the diameter of the compact is 10-12 mm, and the length of the compact is 30-100 mm; Put the compact into a vacuum or argon-protected drying furnace, heat it to 200-400°C, and dry and degas; finally, place the degassed compact in a negative pressure casting cavity where the hammer head needs to be strengthened. In the corresponding position, and keep the vacuum suction force of the negative pressure casting cavity at 0.08~...

Embodiment 2

[0030] Ti powder, B powder with particle size less than 50 microns 4 Composed of C powder, Ni powder, Fe powder and Cr powder, among which Ti powder and B 4 The ratio of C powder is Ti:B in molar ratio 4 C=3:1, and Ni content weight percentage is 20~40%, Fe content weight percentage is 0~10%, Cr content weight percentage is 0~10% reactant powder that mixes and puts in the ball mill mixer, Mix the materials for 5-8 hours to make them evenly mixed; then put the reactant powder into the mold and press it into a compact at room temperature. The compaction rate of the compact is 70-80%, and the diameter of the compact is 10-12 mm. The length of the compact is 30-100 mm; then put the reactant compact into an argon-protected drying furnace, heat it to 200-400°C, and dry and degas; finally, place the degassed compact into negative die casting The corresponding position of the hammer head in the mold cavity needs to be strengthened, and the vacuum suction force of the negative pressu...

Embodiment 3

[0032] It is composed of Ti powder, BN powder, Ni powder, Fe powder and Cr powder with a particle size of less than 50 microns, wherein the ratio of Ti powder and BN powder is Ti:BN=3:2 by molar ratio, and the weight percentage of Ni content is 20-40%, the Fe content is 0-10% by weight, and the Cr content is 0-10% by weight. The mixed reactant powder is put into a ball mill mixer and mixed for 5-8 hours to make it evenly mixed; Then put the reactant powder into the mould, press it into a compact at room temperature, the compaction rate of the compact is 70-80%, the diameter of the compact is 10-12 mm, and the length of the compact is 30-100 mm; Put the pressed compact into a vacuum-protected drying furnace, heat it to 200-400°C, and dry and degas; finally, place the degassed compact in the corresponding position where the hammer head needs to be strengthened in the cavity of the negative pressure casting mold, and Keep the vacuum force of the negative pressure casting cavity a...

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Abstract

The invention relates to an in-situ ceramic partially-reinforced composite material hammerhead for a crusher and a preparation method. An in-situ ceramic granular partially-reinforced area with the thickness of 30-100 mm is formed on the striking surface of the hammerhead by utilizing a high-temperature synthetic reaction in a negative pressure cast die cavity. A hammer body of the in-situ ceramic partially-reinforced steel-based composite material hammerhead obtained according to the preparation method of the invention is alloy steel, high-Cr cast iron or high-manganese steel, the striking surface of the hammerhead comprises a steel matrix and cylindrical ceramic reinforced units evenly distributed in the steel matrix, wherein ceramics in the cylindrical ceramic reinforced units are in-situ TiC, TiB2 / TiC or TiB2 / TiN ceramic particles formed by a self-propagating reaction, and metallurgical bonding is adopted for bonding the cylindrical ceramic reinforced units in the in-situ ceramic partially-reinforced area and the matrix steel as well as ceramic particles and the metal in each cylindrical ceramic reinforced unit. The steel-based composite material hammerhead has excellent anti-abrasion performance.

Description

technical field [0001] The invention belongs to the application field of crushers in the metallurgical industry, and in particular relates to an in-situ ceramic partially reinforced steel-based composite material hammer for crushers and a preparation method thereof. Background technique [0002] The hammer head is the key accessory of the hammer crusher used in the building materials, mining, chemical and other industries, and it is also a vulnerable part. The traditional hammer head is mostly cast with high manganese steel, and the wear resistance of high manganese steel is improved by utilizing the characteristics of work hardening under impact load, but its wear resistance is far from suitable for the needs of modern production with high efficiency and low consumption. Due to the short life of the hammer head and frequent shutdown and replacement, the operating rate of the equipment is reduced, so it is necessary to find a new material and new process to improve the perfo...

Claims

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Application Information

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IPC IPC(8): B02C13/28B22D19/16
Inventor 姜启川王慧远吕思婕舒世立赵海龙
Owner JILIN UNIV
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