Casting method for copper bush with high lead bronze content

A technology of bronze and copper sleeves, applied in casting molding equipment, casting molds, casting mold components, etc., can solve problems such as limited, and achieve the effects of reasonable casting process, good production efficiency, and high genuine product rate.

Inactive Publication Date: 2014-04-23
JIANGSU RECODE RAIL TRANSIT TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are certain limitations in the production of high-lead bronzes using ordinary metal molding methods. Especially for castings with relatively thick walls and relatively large products, the effect of ordinary metal molding on preventing segregation will be limited. In order to accelerate cooling, reduce segregation, it cannot completely rely on the heat absorption capacity of the metal mold

Method used

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  • Casting method for copper bush with high lead bronze content
  • Casting method for copper bush with high lead bronze content
  • Casting method for copper bush with high lead bronze content

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with the accompanying drawings and given embodiments, but is not limited thereto.

[0030] Such as figure 1 , 2 , 3, a method for casting a high-lead bronze sleeve with a relatively thick wall thickness and a relatively large shape, using a metal mold with a half-fit structure whose parting surface of the casting and its runner system is the casting outer mold , with the metal core of multi-parting structure as the casting inner mold, and the chemical components of the high-lead bronze copper sleeve and the weight percentages of each component thereof are Pb18~23%, Sn4~6%, Cu Surplus, and it: take the water cooling device that is located at the periphery of described casting mold as the cooling means of casting, and its specific steps include:

[0031] Step a, copper alloy smelting; the copper alloy smelting is to weigh copper, lead and tin according to the process ratio and put them into the furnace...

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Abstract

The invention relates to a casting method for a copper bush with high lead bronze content. The casting method is characterized in that a metal mould taking a parting surface of a casting and a pouring gate system as a half folding structure is used as an external casting mould; a metal mould core with a multi-piece parting structure is used as an internal casting mould; the copper bush with high lead bronze content comprises the following chemical components in percentage by weight: 18-23% of Pb, 4-6% of Sn and the balance of Cu; a water cooling device arranged at the periphery of the casting mould is used as a cooling means of the casting; and the casting method comprises the concrete casting steps: copper alloy smelting; deoxidation treatment; casting mould preheating; casting pouring; casting cooling; and casting head removal to obtain the copper bush with high lead bronze content. The casting method has the advantages of reasonable process, low production cost and the like and the quality of the produced copper bush is high.

Description

technical field [0001] The invention relates to a casting method of a high-lead bronze sleeve. Background technique [0002] The existing lead bronzes include 10-10 lead bronze, 15-8 lead bronze, 7-4-4 lead bronze, 20-5 lead bronze and 30 lead bronze in the national standard GB / T1176-1987. Among them, 20-5 lead bronze and 30 lead bronze belong to high lead bronze. [0003] High-lead bronze copper sleeves are commonly used in large-scale crushing equipment with high load and high speed, because high-lead bronze has a small friction coefficient and good wear resistance; it has a long fatigue life and is not easy to crack under impact. It is an important shaft sleeve that withstands high pressure, high speed and impact; the material of this type of copper sleeve is usually 20-5 lead bronze, or 30 lead bronze such as high lead bronze. Due to the low mechanical properties of 30 lead bronze, it cannot be used as a single bearing alone, but can only be cast on the inner wall of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C33/08C22C9/08C22C1/02B22C9/24B22D21/00
Inventor 史东丽李震刚董永
Owner JIANGSU RECODE RAIL TRANSIT TECH CO LTD
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