Casting method of high-hardness and erosion-resistant combined stop valve body

A technology of anti-scour and globe valve, applied in casting molding equipment, casting mold, casting mold composition, etc., can solve the problems affecting the appearance quality and service life of the valve body, the uneven thickness of slag inclusion and surface composite layer, and the quality of casting infiltration layer. Poor stability and other problems, to achieve good surface protection, appearance quality, good performance and high hardness

Inactive Publication Date: 2016-08-24
ANHUI XINHONG MACHINERY
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the problems of pores, slag inclusions and uneven thickness of the surface composite layer, the casting infiltration technology is prone to problems, which will lead to casting defects when it is actually applied to the production of valve bodies, which will affect the appearance quality and service life of the valve body.
The literature "

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0013] A method for casting a valve body of a high-hardness and erosion-resistant composite globe valve includes the following steps:

[0014] (1) Prepare pouring liquid, in which the chemical composition weight percentage of the pouring liquid is as follows: C: 0.22%, Si: 0.25%, Mn: 0.60%, Ni: 0.50%, Cu: 0.25%, B: 0.15%, P: 0.03 %, S: 0.02%, the balance is Fe, each raw material is smelted in an intermediate frequency induction furnace at 1580℃, and the chemical composition is adjusted to obtain the pouring liquid;

[0015] (2) Preparing cast-infiltrating coatings, where cast-infiltrating coatings are made of the following weight (kg) raw materials: 200 mesh titanium iron powder 40, 200 mesh titanium nitride 5, polyvinyl alcohol 0.5, rosin 0.1, acrylic acid 0.1, persulfuric acid Ammonium 0.01, Lithium Silicate 2, Sodium Fluoride 1, Carbon Nanotube 1, Carboxymethyl Cellulose 0.1, Silane Coupling Agent KH-550 0.5; The method for preparing the cast-infiltrated coating is to first comb...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a casting method of a high-hardness and erosion-resistant combined stop valve body. The method comprises the following steps: (1) preparing pouring liquid, wherein the pouring liquid comprises the following chemical components in percentage by weight: 0.22 to 0.26% of C, 0.25 to 0.45% of Si, 0.60 to 0.80% of Mn, 0.50 to 0.70% of Ni, 0.25 to 0.45% of Cu, 0.15 to 0.25% of B, not greater than 0.03% of P, not greater than 0.02% of S, and the balance Fe; (2) preparing a casting-infiltration coating; (3) pouring the valve body; (4) performing thermal treatment and finishing. The stop valve body manufactured by the casting method has the advantages that an uniform and stable casting-infiltration combined layer is formed on the surface, the hardness is high, and the erosion resistance is outstanding, the yield is high, the quality is stable, the appearance quality and the use performance are high, and the service life is long.

Description

technical field [0001] The invention relates to the technical field of valve casting, in particular to a casting method for a valve body of a high-hardness and erosion-resistant composite globe valve. Background technique [0002] Valves are important components for the conveying and control of flowing materials. In use, in addition to meeting the requirements of technical indicators such as temperature and pressure, they must also meet the different needs of materials with different properties, such as corrosion, wear, adhesion, etc. At the same time, the sealing performance and service life of the valve are also very important technical indicators. [0003] The casting infiltration method is to make alloy powder and other raw materials into paint and brush it on the surface of the mold. When pouring, the matrix metal liquid penetrates into the capillary pores of the paint, and the alloy powder is melted and melted by the heat of the metal liquid, and is fused with the base...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C22C38/04C22C38/08C22C38/02C22C38/16B22C3/00B22D19/08C21D9/00
CPCB22C3/00B22D19/08C21D6/001C21D6/005C21D9/0068C21D2251/02C22C38/02C22C38/04C22C38/08C22C38/16C22C38/32
Inventor 刘奎新刘瑞
Owner ANHUI XINHONG MACHINERY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap