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Valve rod powder metallurgy manufacturing method for check valve

A powder metallurgy and manufacturing method technology, applied in other manufacturing equipment/tools, turbines, engine components, etc., can solve the problems of difficult to control the dimensional accuracy of products, high cost, poor strength and wear resistance, etc.

Active Publication Date: 2013-04-03
ANHUI PUYUAN SEPARATION MACHINERY MFG CO LTD
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  • Abstract
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Problems solved by technology

At present, the commonly used iron-based powder metallurgy materials in my country include copper, nickel, tree ash and other precious non-fe

Method used

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Embodiment Construction

[0022] The valve stem powder metallurgy manufacturing method of the check valve includes the following steps,

[0023] a. Choose the following powder raw material powder metallurgy to make the valve stem by one-time pressing, and its weight percentage is: the balance is iron-based powder; carbon: 0.8%; tree ash: 1.1%; copper: 1.3%; manganese sulfide: 0.3%; Zinc stearate: 0.8%;

[0024] b. Put the valve stem product obtained by sintering into No. 20-30 engine oil for 2-3 hours, and then conduct water atomization steam treatment, the treatment time is 3-5 hours, and the temperature is 550-650°C;

[0025] c. Heat treatment: firstly carry out normalizing treatment, keep the valve stem after steam treatment at 665-775°C for about 1-2 hours, take it out and then perform quenching treatment: send it into a heat treatment furnace and heat it to 540-680°C, and Keep warm for 2-3 hours; then, cool with quenching oil, and finally perform tempering treatment: put the quenched valve stem i...

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Abstract

The invention discloses a valve rod powder metallurgy manufacturing method for a check valve, which is characterized by comprising the following steps: a, preparing a valve rod through the following powdered raw materials and powdered alloy in weight percentage by one-step press forming: the balance of ferrous metal powder, 0.3 to 1.2% of carbon, 0.2 to 1.4% of tree ash, 0.7 to 2.4% of copper, 0.1 to o.5% of manganese sulfide, and 0.3 to 1.2% of zinc stearate. The method takes powdered alloy steel as the main material, can improve strength, corrosion resistance, and abrasive resistance of medal parts, and lowers manufacturing cost of the powdered metallurgy material.

Description

technical field [0001] The invention relates to a powder metallurgy manufacturing method for a valve stem of a check valve. Background technique [0002] Powder metallurgy technology can produce parts requiring high dimensional accuracy and complex shapes in a shape very similar to the shape of the product, which can greatly reduce cutting costs. Therefore, powder metallurgy products are used in various fields as parts of various machines and devices. [0003] Generally speaking, after mixing powder for alloy such as graphite powder and lubricant powder such as stearic acid and stearic acid file into iron-based powder to form iron-based powder mixed powder, the iron-based powder mixed powder is filled into metal Mold, press molding to manufacture iron-based powder compacts (compact powders) for powder metallurgy. Among them, the iron-based powder can be divided into iron powder (pure iron powder, etc.), alloy steel powder, etc. according to the composition. In additio...

Claims

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Application Information

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IPC IPC(8): B22F1/00B22F3/16B22F3/24B22F5/00C22C38/16
Inventor 沈泽文黄帅彭哲
Owner ANHUI PUYUAN SEPARATION MACHINERY MFG CO LTD
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