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Casting method for high-lead bronze

A bronze and high-lead technology, applied in the direction of casting molding equipment, casting molds, casting mold components, etc., can solve limited and other problems, and achieve the effect of reasonable casting process, low production cost and high authenticity rate

Inactive Publication Date: 2018-05-08
张玉英
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  • Summary
  • Abstract
  • Description
  • 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 high-lead bronze
  • Casting method for high-lead bronze

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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] As shown in Figures 1, 2, and 3, a casting method for a high-lead bronze sleeve with a relatively thick wall thickness and a relatively large shape. The parting surface of the casting and its runner system is a metal with a Huff joint structure. The mold is a casting outer mold, and a metal core with a multi-part type structure is a casting inner mold, and the chemical composition of the high-lead bronze copper sleeve and the weight percentages of each component are Pb18~23%, Sn4 ~6%, the remaining amount of Cu, and it: the water cooling device arranged on the periphery of the casting mold is used as the cooling method of the casting, and the 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 t...

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Abstract

The invention relates to a casting method for a high-lead bronze copper bush. According to the casting method, a metal mold which takes the parting surface of a casting and a runner system of the casting as a half alignment structure serves as a casting outer mold body, a metal mold core of a multi-piece parting structure serves as a casting inner mold body, the high-lead bronze copper bush comprises the chemical components, by weight percentage, 18-23% of Pb, 4-6% of Sn and the balance Cu, and a water cooling device arranged on the periphery of a casting mold serves as a cooling means for thecasting. The casting method specifically comprises the steps of smelting a copper alloy, carrying out deoxidation treatment, preheating the casting mold, pouring the casting, cooling the casting andremoving a casting head so as to obtain the high-lead bronze copper bush. The casting method has the advantages of being reasonable in process and low in production cost, and the quality of the produced copper bush is good.

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): B22C9/24B22C9/06C22C9/08B22C9/08F16C33/08F16C33/14
CPCB22C9/24B22C9/061B22C9/065B22C9/082B22C9/088C22C9/08F16C33/08F16C33/14
Inventor 张玉英
Owner 张玉英
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