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Casting Method of Low Alloy Hydraulic Pump Stator Castings

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: 2012-02-15
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 Castings
  • Casting Method of Low Alloy Hydraulic Pump Stator Castings
  • Casting Method of Low Alloy Hydraulic Pump Stator Castings

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 casting method of a stator casting of a low-alloy hydraulic pump. The steps include sand mixing, molding, furnace material smelting, tapping inoculation treatment, pouring, cooling, unpacking, and casting cleaning. The sand mixing molding step is to use clay green sand to make molds with a microseismic compaction molding machine. The charge smelting step includes setting charge and smelting, and the mass percentage of charge is: 15-25% of pig iron, 45-55% of returned iron, and 25-35% of scrap steel; the smelting adopts medium-frequency induction furnace for smelting. The iron tapping inoculation treatment process includes iron tapping and silicon barium inoculant inoculation treatment. The stator casting product produced by the present invention has a tensile strength > 350Mpa, and a product body hardness of 220-280HBS; the graphite form of the metallographic structure of the product is mainly type A, the graphite length is 4-5 grades, and pearlite > 95% , Carbide + phosphorus eutectic <5%; each part of the casting has 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 Patents(China)
IPC IPC(8): B22D1/00C21C5/52B22C9/10B22D25/00
Inventor 徐清
Owner 上海华新合金有限公司