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Valve body casting formation manufacturing method

A technology of casting and valve body, which is applied in the direction of valve details, valve device, furnace type, etc., can solve the problems of slow processing speed of spherical pressure reducing valve body, not suitable for mass production, low material utilization rate, etc., and achieve improvement High-temperature compressive strength, long service life, and high pass rate

Inactive Publication Date: 2017-09-26
成都莱达机械电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the powder metallurgy pressure reducing valve body, the processing speed of the spherical pressure reducing valve body manufactured by ordinary high-speed steel or stainless steel is slower, and the material utilization rate is not high. High efficiency, and not suitable for mass production, powder metallurgy valve body needs a small amount of fine grinding before assembly and use, and cracks are prone to appear during use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] The invention will be described in further detail below through specific examples.

[0018] The casting and molding preparation method of a valve body provided by the present invention includes the following steps: (1) Add recarburizer, steel material, and some ferroalloys in proportion to an intermediate frequency induction furnace, and then add the remaining ferroalloy after electrification and after the furnace material is melted, and take a sample Perform pre-furnace analysis to smelt qualified molten iron. The chemical components (WT%) of the molten iron are: C: 2.7-3.1%, Si: ≤0.45%, Mn: 0.8-1.2%, Mg: ≤1%, P: ≤ 0.05%, S: ≤ 0.05%, Cr: 15-17%, Cu: 1-1.5%, the balance being Fe;

[0019] (2) Put 0.6-0.7% rare earth silicon-magnesium alloy of ladle mass into the ladle, the rare earth silicon-magnesium alloy is broken into small pieces, and the molten iron is poured into the ladle for deterioration treatment;

[0020] (3) Pour pouring liquid into the sand mold through t...

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PUM

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Abstract

The invention discloses a casting molding preparation method of a valve body, which relates to a metal molding process and includes the following steps: (1) making raw materials; (2) pouring raw materials to make pouring liquid; (3) molding of castings; 4) Preliminary heat treatment; (5) Normalizing treatment of castings; (6) Tempering treatment; (7) Carburizing treatment. The manufacturing process of the invention has high production continuity and high material utilization rate, is suitable for mass production and reduces cost.

Description

technical field [0001] The invention belongs to metal forming technology, in particular, relates to a casting and forming preparation method of a valve body. Background technique [0002] The pressure reducing valve is suitable for various concentrations of aqua regia, sulfuric acid, hydrochloric acid, hydrofluoric acid and various organic acids, strong acids, and strong oxidants at -50 to 150 ° C, and is also suitable for various concentrations of strong alkali organic solvents and other corrosion. It is used on the pipeline of inert gas and liquid medium. [0003] At present, in the pressure reducing valve industry, the domestic spherical pressure reducing valve body is made of ordinary high-speed steel, or stainless steel is machined into the spherical pressure reducing valve body. Compared with the powder metallurgy pressure reducing valve body, the processing speed of the spherical pressure reducing valve body manufactured by ordinary high-speed steel or stainless stee...

Claims

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Application Information

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IPC IPC(8): C22C33/10C22C37/06C22C37/10B22D31/00C21D1/28C21D9/00C21D5/00C23C8/22F16K27/00
CPCC22C33/10B22D31/00C21D1/28C21D5/00C21D9/0068C22C37/06C22C37/10C23C8/22F16K27/00
Inventor 邓涛
Owner 成都莱达机械电子有限公司