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Bimetal composite hammer manufacture method and hammer handler precasting products

A composite hammer head and bimetal technology, which is applied in the direction of manufacturing tools, metal processing equipment, casting molding equipment, etc., can solve the problems of easy falling off and lower performance, and achieve high bonding strength, low production cost, and improved impact toughness Effect

Inactive Publication Date: 2009-06-17
BEIJING JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to solve the problem that the cast-in-cast bimetal composite hammer head is easy to fall off and the two-liquid bimetal composite hammer head is easy to mix and reduce the performance of the two metal liquids.

Method used

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  • Bimetal composite hammer manufacture method and hammer handler precasting products
  • Bimetal composite hammer manufacture method and hammer handler precasting products
  • Bimetal composite hammer manufacture method and hammer handler precasting products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A high chromium cast iron / high manganese steel bimetal composite hammerhead for a hammer crusher with a single piece weight of 55 kg was prepared. The length d of the hammerhead head 1 is 170 mm, the width f is 190 mm, and the thickness e is 110 mm.

[0035] Hammer handle preform 3 is made of high manganese steel with brand ZGMn13, and its impact toughness at room temperature is 15J / cm 2 And the hardness is 25HRC, and it is formed by sand casting method. The length c of the connecting handle 2 of the hammer handle preform is 136 mm, the width b is 95 mm, and the thickness a is 55 mm. There is an annular groove with a depth of 5mm and a width of 10mm on the surface of the connecting handle of the prefabricated hammer handle.

[0036] A kind of concrete steps of the preparation method of bimetal composite hammer head are as follows:

[0037] Step 1: Coat the surface of the prefabricated part of the hammer handle with a borate heat treatment protective coating, and heat...

Embodiment 2

[0044] Prepare a low-chromium cast iron / ZG35 steel bimetal composite hammer head for a hammer crusher with a single piece weight of 5 kg. The length d of the hammerhead head 1 is 60 mm, the width f is 100 mm, and the thickness e is 50 mm.

[0045] Hammer handle prefabrication 3 is made of cast steel with grade ZG35, and its impact toughness at room temperature is 5J / cm 2 And the hardness is 35HRC, and it is formed by sand casting method. The length c of the connecting handle 2 of the hammer handle preform is 35 mm, the width b is 40 mm, and the thickness a is 22 mm. There is an annular groove with a depth of 3 mm and a width of 5 mm on the surface of the connecting handle of the prefabricated hammer handle.

[0046] A kind of concrete steps of the preparation method of bimetal composite hammer head are as follows:

[0047] Step 1: Coat the surface of the prefabricated part with a silicate heat treatment protective coating, and heat it to 400°C for 30 minutes.

[0048] Step...

Embodiment 3

[0054] A medium manganese steel / 40Cr steel bimetallic composite hammer head for a hammer crusher with a single piece weight of 5 kg was prepared. The length d of the hammerhead head 1 is 60 mm, the width f is 100 mm, and the thickness e is 50 mm.

[0055] Hammer handle preform 3 is made of 40Cr forged steel and machined into shape; its room temperature impact toughness is 20J / cm 2 And the hardness is 40HRC. The length c of the connecting handle 2 of the hammer handle preform is 15 mm, the width b is 33 mm, and the thickness a is 16.6 mm. There is an annular groove with a depth of 2mm and a width of 3mm on the surface of the connecting handle of the prefabricated hammer handle.

[0056] A kind of concrete steps of the preparation method of bimetal composite hammer head are as follows:

[0057] Step 1: Coat the surface of the prefabricated part with an alcohol boric acid heat treatment protective coating, and heat it to 300°C for 20 minutes.

[0058] Step 2, apply forsterite...

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Abstract

The invention relates to a method for preparing a double-metal composite hammer, which comprises the following steps: coating a thermal treatment protective paint on a hammer handle prefabricated member (3), and heating the hammer handle prefabricated member to be between 300 and 800 DEG C; coating casting paint on the surface of a cavity of a metal die (4), and preheating the metal die to be between 120 and 300 DEG C; putting the hammer handle prefabricated member into the cavity of the metal die, and pouring abrasion-resistant alloy melt (5) into the cavity of the metal die at a temperature of between 15 and 80 DEG C higher than a phase line temperature of the abrasion-resistant alloy melt; and within 10 seconds after pouring, pressurizing the hammer handle prefabricated member at 50 to 150MPa, keeping the pressure, and then taking out the hammer. Impact toughness of the hammer handle prefabricated member is more than or equal to 5 to 20 J / cm<2>, hardness is 25 to 40HRC, and the hammer handle prefabricated member is processed and shaped. The length of a connecting handle of the hammer handle prefabricated member is 1 / 4 to 4 / 5 of the length of the hammer head (1), and the thickness and the width of the connecting handle are 1 / 3 to 1 / 2 of the thickness and the width of the hammer respectively; and the surface of the connecting handle is provided with an annular groove. The method solves the problem that an embedded double-metal composite hammer is easy to fall off and a double-liquid double-metal composite hammer is easy to mix double liquids so as to reduce service performance.

Description

technical field [0001] The invention relates to a preparation method of a bimetal composite hammerhead for a hammer crusher, which is suitable for manufacturing bimetal composite hammerheads of various sizes and shapes. Background technique [0002] Hammer crusher is an important crushing equipment, which is widely used in metallurgy, mining, chemical industry, electric power, coal, building materials and other industries. The hammer head is an important anti-wear part in the hammer crusher, and there is a common problem of short service life at present. How to improve the service life of the hammer head is a common concern. [0003] The use characteristics of the hammer head require its head to be high in hardness and wear resistance, and its handle is required to have high comprehensive performance to ensure no breakage. When the hammer head of a single material can guarantee the wear resistance, the fracture risk of the shank is relatively high; when the shank is guaran...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D19/16B22C3/00B02C13/28
Inventor 邢书明牛建平鲍培玮皮忠敏宋新丰韩永清闫丽峰
Owner BEIJING JIAOTONG UNIV
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