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Low-cost and high-toughness heterogeneous alloy abrasion-resisting hammerhead and manufacturing method thereof

A heterogeneous alloy and high toughness technology, applied in the field of metal materials, can solve the problems of insufficient toughness of the hammer handle, weak market competitiveness, high production cost, etc., and achieve the effects of uniform cross-sectional hardness distribution, high wear resistance and reduced production cost

Active Publication Date: 2018-09-18
TANGSHAN DONGFANG HUASHENG GOOD WEAR RESISTING HIGH TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Chinese patents CN 105195265, CN 106834894, and CN 103357470 all disclose a method for manufacturing a bimetallic composite hammer. The end of the hammer is high-chromium cast iron, and the handle of the hammer is medium-carbon low-alloy steel. Although these products solve the problem of The lack of toughness of the hammer handle is eliminated, but the end of the hammer head is still made of high-chromium cast iron. Although high-chromium cast iron has high wear resistance, it is very brittle (impact toughness is usually less than 10J / cm 2 ), easy to break, and insufficient toughness is still the fatal shortcoming of these products
In addition, high chromium cast iron contains high alloying element Cr (usually the content is greater than 15%), the production cost is high, and the market competitiveness is weak

Method used

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  • Low-cost and high-toughness heterogeneous alloy abrasion-resisting hammerhead and manufacturing method thereof
  • Low-cost and high-toughness heterogeneous alloy abrasion-resisting hammerhead and manufacturing method thereof
  • Low-cost and high-toughness heterogeneous alloy abrasion-resisting hammerhead and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Production of 50kg hammer heads.

[0028] (1) Smelting: The chemical composition weight percentage of the end of the hammer head is: C: 1.58%, Si: 0.42%, Mn: 0.34%, P: 0.018%, S: 0.007%, Cr: 10.5%, Mo: 0.48% , V: 0.18%, RE: 0.025%; the weight percentage of the chemical composition of the shank of the hammer is C: 0.26%, Si: 0.34%, Mn: 0.82%, P: 0.016%, S: 0.010%, Cr: 1.83% , Ni: 0.68%, Mo: 0.42%. According to the chemical composition requirements of the end of the hammer head and the handle of the hammer head, two furnaces of molten steel are smelted using an intermediate frequency induction furnace. When the temperature is 1580°C, the molten steel at the end of the hammer head is first poured into the mold, and then the molten steel at the handle of the hammer head is poured into the mold.

[0029] (2) Pretreatment

[0030] The castings after slow cooling are pretreated according to the following process sequence: ①The castings are heated to 550°C with the furnace, ...

Embodiment 2

[0042] Production of 70kg hammer heads.

[0043] (1) Smelting: The chemical composition weight percentage of the end of the hammer head is: C: 1.63%, Si: 0.31%, Mn: 0.44%, P: 0.018%, S: 0.008%, Cr: 11.5%, Mo: 0.58% , V: 0.22%, RE: 0.015%; the chemical composition weight percentage of the shank of the hammer head is C: 0.30%, Si: 0.36%, Mn: 0.91%, P: 0.016%, S: 0.005%, Cr: 2.14% , Ni: 0.72%, Mo: 0.44%. According to the chemical composition requirements of the end of the hammer head and the handle of the hammer head, two furnaces of molten steel are smelted using an intermediate frequency induction furnace. When the temperature is 1580°C, the molten steel at the end of the hammer head is first poured into the mold, and then the molten steel at the handle of the hammer head is poured into the mold.

[0044] (2) Pretreatment

[0045] The castings after slow cooling are pretreated according to the following process sequence: ①The castings are heated to 560°C with the furnace, an...

Embodiment 3

[0056] Production of 90kg hammer heads.

[0057] (1) Smelting: The chemical composition weight percentage of the end of the hammer head is: C: 1.70%, Si: 0.45%, Mn: 0.43%, P: 0.020%, S: 0.008%, Cr: 12%, Mo: 0.52% , V: 0.28%, RE: 0.023%; the weight percentage of the chemical composition of the shank of the hammer is C: 0.31%, Si: 0.38%, Mn: 0.98%, P: 0.016%, S: 0.009%, Cr: 2.28% , Ni: 0.80%, Mo: 0.50%. According to the chemical composition requirements of the end of the hammer head and the handle of the hammer head, two furnaces of molten steel are smelted using an intermediate frequency induction furnace. When the temperature is 1590℃, the molten steel at the end of the hammer head is first poured into the mold, and then the molten steel at the handle of the hammer head is poured into the mold.

[0058] (2) Pretreatment

[0059] The castings after slow cooling are pretreated according to the following process sequence: ①The castings are heated to 580°C with the furnace for ...

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Abstract

The invention relates to a low-cost and high-toughness heterogeneous alloy abrasion-resisting hammerhead and a manufacturing method thereof. The end part of the hammerhead comprises the chemical compositions of 1.50-1.70% of C, 0.30-0.45% of Si, 0.30-0.45% of Mn, no more than 0.020% of P, no more than 0.010% of S, 10.0-12.0% of Cr, 0.40-0.60% of Mo, 0.15-0.30% of V, and 0.01-0.03% of RE; and the handle part of the hammerhead comprises the chemical compositions of 0.26-0.32% of C, 0.30-0.40% of Si, 0.80-1.00% of Mn, no more than 0.020% of P, no more than 0.010% of S, 1.80-2.30% of Cr, 0.60-0.80% of Ni, and 0.40-0.50% of Mo. Compared with a high-chromium cast iron hammerhead, the life of the low-cost and high-toughness heterogeneous alloy abrasion-resisting hammerhead is prolonged by 1-3 times.

Description

technical field [0001] The invention relates to a low-cost, high-toughness heterogeneous alloy wear-resistant hammer head and a manufacturing method thereof, belonging to the technical field of metal materials. Background technique [0002] Due to its simple structure, large crushing ratio and low energy consumption, the hammer crusher is suitable for crushing various materials, so it is used in mining, metallurgy, electric power, building materials, chemical industries and other industries to crush granite, basalt, limestone, river pebbles, cement clinker , quartz stone, iron ore, bauxite and other minerals. The hammer head is the main wear part of the crusher. The hammer head is subjected to complex forces during work, and it is subjected to repeated effects of impact, extrusion, shearing and contact fatigue. Therefore, it is required that the material for the preparation of the hammer head not only has sufficient impact resistance, In order to prevent fracture, it also n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/22C22C38/24C22C38/44B22D19/16C21D1/18C21D9/00
CPCB22D19/16C21D1/18C21D9/0068C22C38/002C22C38/005C22C38/02C22C38/04C22C38/22C22C38/24C22C38/44
Inventor 李淑君
Owner TANGSHAN DONGFANG HUASHENG GOOD WEAR RESISTING HIGH TECH
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