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Powder metallurgy method for pump body of hydraulic pump

A powder metallurgy and hydraulic pump technology, applied in the direction of metal material coating process, etc., can solve problems such as poor manufacturing process, reduce labor, reduce material consumption and cost input, and improve work efficiency.

Inactive Publication Date: 2014-06-11
ANHUI ZHENYE MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, hydraulic pumps are not only made of poor materials, but also suitable for mass production. Before assembly and use, a small amount of fine grinding is required for the pump body.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] A powder metallurgy method for a pump body of a hydraulic pump, comprising the following steps:

[0014] a. Configure the iron-based mixed powder so that it contains the following components by mass percentage, including Mo: 0.4-1.2% and Mn: 0.1-0.25% as a pre-alloy, and the balance is iron and impurities, And add 0.6-4.2% Cu powder, 0.5-1.5% Ni powder, 0.3-1.0% graphite powder and 0.01-5% to the iron-based mixed powder .0% polyamide wax flake powder, the polyamide wax flake powder has an average particle diameter of less than 200 μm and a thickness of less than 30 μm; then press and sinter to obtain the pump body workpiece;

[0015] c. Quenching treatment: Send the sintered hydraulic pump body into a heat treatment furnace and heat it to 850-890°C, and keep it warm for 2-3 hours; then cool it to 300-320°C with quenching oil; heat it to 600-700°C and Keep warm for 1~2h;

[0016] d. Tempering treatment: Put the quenched hydraulic pump body into the tempering furnace an...

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Abstract

The invention discloses a powder metallurgy method for pump body of a hydraulic pump. The method comprises the following steps: a, preparing iron-based mixed powder containing the following components by mass percent: pre-alloy with 0.4 to 1.2 % of Mo, 0.1 to 0.25 % of Mn and the balance being Fe and impurities, 0.6 to 4.2 % of Cu powder, 0.5 to 1.5 % of Ni powder, 0.3 to 1.0 % of graphite and 0.01 to 5.0 % of polyamide wax-sheet-shape powder, wherein the polyamide wax-sheet-shape powder has an average particle size of a long diameter of less than 200 [mu]m, and a thickness of less than 30 [mu]m; compressing, sintering and moulding to obtain the pump workpieces. The powder metallurgy material and the manufacturing process are relatively high in production continuity, high in material utilization rate, and suitable for mass production, and can reduce costs.

Description

technical field [0001] The invention relates to a preparation method of a hydraulic pump, in particular to a powder metallurgy method for a pump body of a hydraulic pump. Background technique [0002] The hydraulic pump is the control component in the fluid delivery system, which has functions such as flow diversion or overflow and pressure relief. Valves used in fluid control systems range from the simplest cut-off pumps to various pumps used in extremely complex automatic control systems, and there are quite a variety of varieties and specifications. Pumps can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. At present, hydraulic pumps are not only made of poor materials, but also suitable for mass production. Before assembly and use, a small amount of fine grinding is required on the pump body. Contents of the invention [0003] The technical problem to be solved by...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/12C22C33/02B22F1/00B22F3/16B22F3/24C21D1/18C23C22/07
Inventor 吕青堂陈栋李文宇
Owner ANHUI ZHENYE MACHINERY