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Preparation method of alloy steel used for manufacturing flanged ball valve body

A flanged ball valve and alloy steel technology, applied in the field of valve manufacturing, can solve problems such as affecting the sealing performance and service life of flanged ball valves, affecting the stress distribution of the valve body, and unbalanced stress distribution, and achieve stable internal atomic structure and internal stress. The effect of uniform distribution and stable mechanical properties

Inactive Publication Date: 2017-07-21
高金建
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the flanged ball valve is used for the control of high-temperature fluid, the long-term high-temperature environment will affect the stress distribution in the valve body, which will easily cause unbalanced stress distribution in the valve body, and easily cause micro-deformation of the valve body, thereby affecting the flanged ball valve. tightness and service life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] ① Take the following raw materials by weight: 1000 parts of steel, 160 parts of copper, 1 part of manganese oxide, 0.5 part of magnesium, 1 part of aluminum, 0.06 part of zinc, 0.1 part of cobalt oxide, 0.4 part of strontium, 0.08 part of chromium, 0.5 part of nickel, Beryllium 0.001 part;

[0017] ② Add steel and copper to the vacuum melting furnace, control the pressure at 0.01MPa, control the temperature at 1800°C, and smelt for 30 minutes, then add manganese oxide, magnesium, aluminum, zinc, and cobalt oxide to continue smelting, control the pressure at 0.003MPa, and control the temperature Melt at 1600°C for 20 minutes, then add strontium, chromium, nickel, and beryllium to continue melting, control the pressure at 0.006MPa, and control the temperature at 1400°C for 15 minutes;

[0018] ③Heat treatment the smelted metal alloy, the heat treatment is quenching at 900°C for 20 minutes, and tempering at 600°C for 110 minutes;

[0019] ④Vacuum pouring, the temperature ...

Embodiment 2

[0023] ① Take the following raw materials by weight: 1200 parts of steel, 180 parts of copper, 10 parts of manganese oxide, 0.8 part of magnesium, 3 parts of aluminum, 0.25 part of zinc, 0.3 part of cobalt oxide, 0.8 part of strontium, 0.15 part of chromium, 0.7 part of nickel, Beryllium 0.008 parts;

[0024] ②Put steel and copper into the vacuum melting furnace, control the pressure at 0.02MPa, control the temperature at 1900°C, and smelt for 40 minutes, then add manganese oxide, magnesium, aluminum, zinc, and cobalt oxide to continue smelting, control the pressure at 0.008MPa, and control the temperature Melt at 1700°C for 30 minutes, then add strontium, chromium, nickel, and beryllium to continue smelting, control the pressure at 0.01MPa, and control the temperature at 1500°C for 20 minutes;

[0025] ③The smelted metal alloy is subjected to heat treatment, the heat treatment is quenching at 1050°C for 25 minutes, and tempering at 650°C for 120 minutes;

[0026] ④Vacuum pou...

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Abstract

The invention discloses a preparation method of alloy steel used for manufacturing a flanged ball valve body. The alloy steel comprises, by weight, 1000-1200 parts of steel, 160-180 parts of copper, 1-10 parts of manganese oxide, 0.5-0.8 part of magnesium, 1-3 parts of aluminum, 0.06-0.25 part of zinc, 0.1-0.3 part of cobalt oxide, 0.4-0.8 part of strontium, 0.08-0.15 part of chromium, 0.5-0.7 part of nickel and 0.001-0.008 part of beryllium. The alloy steel prepared through the preparation method of the alloy steel has good high-temperature resistance. Even the alloy steel is in a high-temperature state for a long time, the internal atomic structure of the alloy steel is stable, and internal stress distribution is uniform. The flanged ball valve body made of the alloy steel is stable in mechanical property and small in thermal expansion coefficient, the valve body and a ball body make tight contact, the sealing property is high and the service life is long.

Description

technical field [0001] The invention relates to the field of valve manufacturing, more precisely, it relates to a preparation method of alloy steel used for manufacturing flanged ball valve body. Background technique [0002] Ball valve and gate valve belong to the same type of valve. The difference is that its closing part is a sphere, and the sphere rotates around the center line of the valve body to achieve opening and closing. Ball valves are mainly used in pipelines to cut off, distribute and change the flow direction of media. Flanged ball valve standard GB / T21465-2008 "Valve Terminology" is defined as a valve whose opening and closing part (ball) is driven by the valve stem and rotates around the axis of the valve stem. [0003] At present, most of the materials used to manufacture the flanged ball valve body are steel materials. When the flanged ball valve is used at room temperature, the mechanical properties of the valve body made of steel material are relatively ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/04C21D1/18C21D6/00
CPCC22C33/04C21D1/18C21D6/00C22C33/006
Inventor 高金建
Owner 高金建
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