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Powder metallurgy preparation method of valve clack of membrane valve

A technology of powder metallurgy and mixed powder, which is applied in the field of powder metallurgy preparation of diaphragm valve discs, can solve the problems of high manufacturing cost, low material utilization rate, slow processing speed of multi-way valves, etc., achieve long service life, improve High temperature compressive strength and high yield

Inactive Publication Date: 2013-04-10
ANHUI HECHENG MACHINERY
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AI Technical Summary

Problems solved by technology

[0003] At present, the processing speed of the multi-way valve is slow, the material utilization rate is not high, and the manufacturing cost is high

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] A powder metallurgy preparation method for a multi-way valve disc, comprising the following steps:

[0015] a. Configure the iron-based mixed powder so that it contains the following components by mass percentage, including Mo: 0.5-1.2% and Mn: 0.1-0.25% as a pre-alloy, and the balance is iron and impurities, And add 0.6-4.2% Al powder, 0.6-1.2% Cu powder, 0.5-1.5% Ni powder, 0.5-1 .2% of graphite powder and 0.21 to 4.9% of polyamide wax flake powder, the polyamide wax flake powder has an average particle diameter of long axis of less than 200 μm and a thickness of less than 30 μm; Sintering molding to obtain the valve piece workpiece;

[0016] b. Treat the workpiece with water atomization steam after sintering and molding, the treatment time is 3-4 hours, and the temperature is 550-650°C;

[0017] c. Heat treatment: normalize first, keep the steam-treated valve plate at 865-875°C for about 1-2 hours, take it out and then perform quenching treatment: put it into a hea...

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Abstract

The invention discloses a powder metallurgy preparation method of a valve clack of a membrane valve. The preparation method comprises the following steps that iron-based mixed powder is prepared so that the iron-based mixed powder comprises the following ingredients in percentage by mass: 0.5 to 1.2 percent of Mo, 0.1 to 0.25 percent of Mn as prealloy and the balance of iron and impurities, in addition, 0.6 to 4.2 percent of Al powder, 0.6 to 1.2 percent of Cu powder, 0.5 to 1.5 percent of Ni powder, 0.5 to 1.2 percent of graphite powder and 0.21 to 4.9 percent of polyamide wax flake powder are added into the iron-based mixed powder, the average grain diameter of the long diameter of the polyamide wax flake powder is less than 200mum, the thickness is less than 30mum, and valve plate workpieces are obtained through pressing and sintering. The powder metallurgy preparation method has the advantages that the manufacture process has higher production continuity, in addition, the material utilization rate is high, the preparation method is suitable for mass production, and the cost is reduced.

Description

technical field [0001] The invention relates to a preparation method of a diaphragm valve, in particular to a powder metallurgy preparation method of a diaphragm valve disc. Background technique [0002] The working valve slices of the multi-way valve are arranged in groups, and the inlet valve block has a built-in three-way pressure compensation bypass relief valve (logic element, when the multi-way valve stops operating and all valves are in the neutral position, the valve uses the compensation pressure (6-·12BAR) bypass main oil circuit flow. When a certain valve is working, the bypass port of the valve is reduced under the load pressure, and the required flow is provided according to the load pressure. At present, the preparation of multi-way valve industry, the domestic The multi-way valve discs of the multi-way valve are made of ordinary high-speed steel or stainless steel through machining multi-way valve. The processing speed of the valve plate is slow, and the mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/16B22F3/24B22F5/00C23F17/00
Inventor 吕青堂陈栋李文宇
Owner ANHUI HECHENG MACHINERY
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