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Manufacturing method of metal valve

A manufacturing method and valve technology, applied in the field of metal valve manufacturing, can solve problems such as affecting health, domestic water pollution, and easy corrosion, and achieve the effects of high surface oxidation resistance, long service life and low cost

Inactive Publication Date: 2015-12-23
李文霞
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In terms of production technology and process, metal valves are more mature among domestic valves. Stainless steel valves and copper valves are more common in the market. There are also cast iron valves in slightly lower-end products, but there are quite a lot of defects in existing metal valves. , Metal valves are extremely prone to corrosion, rust, and plating peeling during long-term use. Heavy metals such as lead and tin in alloys used to manufacture metal valves will gradually penetrate into domestic water, causing pollution to domestic water. directly affect people's health

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method for manufacturing a metal valve, the materials for manufacturing the metal valve include the following:

[0023] C1.2-2.6%Mn0.35-0.65%

[0024] Cr1.25-1.35%Mo0.80-0.90%

[0025] Si0.35-0.65Ni1.5-2.5%

[0026] The rest are Fe and unavoidable impurities, and its manufacturing method comprises the following steps:

[0027] (1) The materials of the above components are smelted according to the above ratio, and the smelting temperature is 1200-1330°C;

[0028] (2) Put the above smelted materials into the mold for pouring, the pouring temperature is 1150-1220°C;

[0029] (3) Cool the mold in sand for 18-20 hours;

[0030] (4) Anneal the poured metal valve body, the annealing temperature is 880-920°C;

[0031] (5) Then quench the metal mold body, the quenching temperature is 950-1030°C;

[0032] (6) Tempering the metal mold blank processed in step 5 at 700-750°C;

[0033] (7) Heat the tempered metal mold body for 2-4 hours, cool it to 200-250°C and release it f...

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PUM

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Abstract

The invention discloses a manufacturing method of a metal valve. The metal valve has the beneficial effects of being resistant to corrosion, low in cost, high in thermal fatigue property and thermal stability and excellent in overall property through the material matching and the manufacturing process of metal materials. The metal valve has high surface oxidation resistance and is long in service life.

Description

technical field [0001] The invention relates to a manufacturing process of a valve, in particular to a manufacturing method of a metal valve. Background technique [0002] Valves are generally composed of a valve body and valve internals inside the valve body. According to the manufacturing materials, they can be divided into metal valves, plastic valves and ceramic valves. [0003] In terms of production technology and process, metal valves are more mature among domestic valves. Stainless steel valves and copper valves are more common in the market. There are also cast iron valves in slightly lower-end products, but there are quite a lot of defects in existing metal valves. , Metal valves are extremely prone to corrosion, rust, and plating peeling during long-term use. Heavy metals such as lead and tin in alloys used to manufacture metal valves will gradually penetrate into domestic water, causing pollution to domestic water. directly affect people's health. Contents of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/56C22C38/44
Inventor 李文霞
Owner 李文霞
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