Casting method of low-alloy hydraulic pump stator casting

A low-alloy, pump stator technology, applied in the direction of casting molding equipment, casting molds, furnace types, etc., can solve problems such as metallographic structure not up to standard

Active Publication Date: 2010-09-08
上海华新合金有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problems that have occurred in the past are also caused by the substandard metallographic structure

Method used

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  • Casting method of low-alloy hydraulic pump stator casting
  • Casting method of low-alloy hydraulic pump stator casting
  • Casting method of low-alloy hydraulic pump stator casting

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Taking the casting of low alloy CC1021S hydraulic pump stator casting as an example, the casting method includes the following steps:

[0045] (1) Sand mixing molding

[0046] The sand mixing process is to mix clay green sand in the sand treatment system, and the mixed sand is transported to the side of the molding machine by a trolley for molding; then the molds made by the microseismic compaction molding machine are arranged in the pouring area Inside, wait for the molten iron to pour.

[0047] For the molding process, please refer to the rough drawing of the low alloy CC1021S hydraulic pump stator casting of the present invention figure 1 , figure 2 , the structure of the stator casting is relatively simple, and the blank is uniform. It is decided to use a microseismic compaction and unboxing molding machine for molding production. The sand mold size is 390×40×100 / 100, and 16 castings are placed in each mold. For the mold plate process diagram, please refer to i...

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Abstract

The invention discloses a casing method of a low-alloy hydraulic pump stator casting, comprising the steps of sand mulling, modeling, charge melting, tapping inoculation treatment, pouring, cooling, unpacking and casting cleanness. In the sand mulling and modeling steps, clay wet sand is produced into a casting model by using a vibratory squeezing slip flask molding machine. The charge melting step comprises charge preparing and melting, wherein the charge comprises the following raw materials in percentage by weight: 15-25 percent of pig iron, 45-55 percent of recirculated iron and 25-35 percent of scrap steel; and the melting is performed by adopting an intermediate-frequency induction electric furnace. The tapping inoculation treatment comprises tapping and inoculation treatment by a silicon-barium inoculant. For the stator casting product produced with the method, the tensile strength is more than 350MPa and the hardness is 220-280HBS; a graphite form of a gold phase tissue is mainly A type, the graphite length is 4-5 grades, the amount of the pearlite is more than 95 percent and the summation of carbide and phosphorus eutectic is less than 5 percent; and various parts of the casting have no casting defects.

Description

technical field [0001] The invention relates to the field of casting, in particular to a method for casting low-alloy hydraulic pump stator castings. Background technique [0002] Hydraulic pumps are widely used in automobile, shipbuilding, aviation, petroleum and chemical machinery engineering because of their high working pressure, compact structure, small size, light weight, stable movement, and automatic protection against overload to achieve safety protection. Vane type oil pumps are generally used as boosters in the steering systems of various automobiles at present to reduce the physical strength of drivers when driving. [0003] With the development of my country's automobile industry, the development of vane oil pumps supporting it has been driven. In recent years, especially in Jiangsu and Zhejiang, many private vane oil pump professional enterprises have been rapidly established, thus greatly increasing the demand for stator castings. . [0004] The main performa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D25/00C21C5/52B22D1/00B22C9/10
Inventor 徐清
Owner 上海华新合金有限公司
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