Casting method for anti-corrosive and abrasion-resistant composite check valve body

A check valve, wear-resistant technology, used in casting molding equipment, casting molds, casting mold components, etc. problems such as poor layer quality stability, to achieve good surface protection, appearance quality, good performance and long service life.

Inactive Publication Date: 2016-09-28
ANHUI XINHONG MACHINERY
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  • 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

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Embodiment Construction

[0013] A method for casting a corrosion-resistant and wear-resistant composite check valve body, comprising the following steps:

[0014] (1) Prepare pouring liquid, wherein the weight percentage of the chemical composition of the pouring liquid is as follows: C: 0.22%, Si: 0.25%, Mn: 0.60%, V: 0.15%, Ni: 0.30, Al: 0.10%, P: 0.03% , S: 0.02%, the balance is Fe, each raw material is smelted in an intermediate frequency induction furnace at 1580-1620 ° C, and the casting solution is obtained after adjusting the chemical composition;

[0015] (2) Prepare cast-infiltrated coatings, wherein the cast-infiltrated coatings are made of the following raw materials in weight (kg): 200 mesh ferric boron powder 40, 200 mesh boron nitride 5, nano zinc oxide 1, polyvinyl alcohol 0.5, turpentine 0.3, Acrylic acid 0.1, ammonium persulfate 0.01, lithium silicate 2, sodium humate 0.3, carbon nanotube 1, silane coupling agent KH-550 0.5, sodium fluoride 1; Pipe, nano-zinc oxide, turpentine and s...

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PUM

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Abstract

The invention discloses a casting method for an anti-corrosive and abrasion-resistant composite check valve body. The casting method includes the following steps that (1) casting liquid is prepared, and chemical components of the casting liquid comprise, by weight, 0.22%-0.26% of C, 0.25%-0.45% of Si, 0.60%-0.80% of Mn, 0.15%-0.25% of V, 0.30%-0.50% of Ni, 0.10%-0.15% of Al, 0.03% or less of P, 0.02% or less of S, and the balance Fe; (2) casting-infiltration coating is prepared; (3) the valve body is cast; and (4) heat treatment and finishing are conducted. The check valve body obtained through the casting method disclosed by the invention is provided with a uniform and stable casting-infiltration composite layer on the surface, has excellent anti-corrosion and abrasion-resistant performance, and is high in yield, stable in quality, good in appearance quality and use performance and long in service life.

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 corrosion-resistant and wear-resistant composite check 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 b...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/12C22C38/08C22C38/06B22C3/00B22D19/08C21D9/00
CPCB22C3/00B22D19/08C21D9/0068C21D2251/02C22C38/02C22C38/04C22C38/06C22C38/08C22C38/12
Inventor 刘奎新刘瑞
Owner ANHUI XINHONG MACHINERY
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