Lost foam casting technology of duplex metal composition hammer head

A technology of lost foam casting and compound hammer head is applied in the field of alloy cast iron casting, which can solve the problems such as the wear resistance can not meet the needs of modern production with high efficiency and low consumption, the hardening effect of high manganese steel is not obvious, and the equipment operation rate is low. The effect of obvious economic benefits and promotion value, good combination status and low production cost

Inactive Publication Date: 2015-04-29
QINGDAO TIANHENG MACHINERY
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  • Abstract
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AI Technical Summary

Problems solved by technology

Utilize the characteristics of work hardening of high manganese steel under the action of impact load to improve wear resistance, but wear resistance is far from meeting the needs of modern production with high efficiency and low consumption
The reason is that the impact on the hammer head is not large during service, the hardening effect of high manganese steel is not obvious, and the wear resistance is poor.
In view of the shortcoming of frequent downtime and replacement of the hammer head and low equipment operation rate, the high-chromium cast iron-carbon steel composite hammer head is used to replace the high manganese steel hammer head

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Using the method of lost foam casting, the high chromium cast iron (liquid) of the head and the carbon steel (solid) of the handle are effectively combined into a bimetal composite hammer head. The volume ratio of liquid metal to solid metal in bimetallic composite casting is 5:1, and the combination of the two metals is mechanical bonding; when the volume ratio is 8:1, the combination is firm and forms a good bond; when the volume ratio is 10:1, It belongs to metallurgical bonding, and the bonding surface is extremely firm. The volume ratio of the two metals is 8.7:l, which meets the requirements of firm bonding.

[0013] Foam plastic pattern making process

[0014] Head and handle models are made of Styrofoam. It is very important to determine the density of foam plastics. A higher density increases the rigidity of the pattern and prevents the model from being deformed when painting, forming and packing sand, while an excessive density will increase defects such as ...

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PUM

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Abstract

The invention discloses a lost foam casting technology of a duplex metal composition hammer head. By lost foam casting method, high-chromium cast iron (liquid) at the head part and carbon steel (a solid) at the handle part are effectively bonded into the duplex metal composition hammer head; the ratio of the liquid metal volume to the solid metal volume for duplex composition casting is 5 to 1, and the bonding form of the two kinds of metal is mechanical bonding; when the volume ratio is 8 to 1, the bonding is firm so as to form good bonding; when the volume ratio is 10 to 1, the bonding form belongs to metallurgical bonding, and the bonding surface is extremely firm; the volume ratio of the two kinds of metal is 8.7 to 1, and he requirement of firm bonding is met. The lost foam casting technology has the beneficial effects that the technological technique is simple, the production cost is low, the yield is high, and the economical and popularization value is obvious.

Description

[0001] technical field [0002] The invention belongs to the technical field of alloy cast iron casting, and in particular relates to a lost foam casting process of a bimetal composite hammer head. [0003] Background technique [0004] The hammer head of the rock crusher undertook the production, the raw material is high manganese steel, the maximum section thickness is 130 mm, the mass is 82 kg, and the sand casting process is adopted. The characteristics of work hardening of high manganese steel under the action of impact load are used to improve wear resistance, but the wear resistance is far from meeting the needs of modern production with high efficiency and low consumption. The reason is that the impact on the hammer head during service is not large, the hardening effect of high manganese steel is not obvious, and the wear resistance is poor. Aiming at the shortcoming of frequent downtime for replacement of the hammer head and low equipment operation rate, the hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/04B22D19/16
CPCB22C9/04B22D19/16
Inventor 刘升迁
Owner QINGDAO TIANHENG MACHINERY
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