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Method for producing corrosion-resistant inching valve body

A micro-action valve and corrosion-resistant technology, which is applied in the field of preparation of corrosion-resistant micro-valve body, can solve the problems of complex process and poor overall performance of the valve body, and achieve high corrosion resistance, strong cutting force, and reduced The effect of the production process

Inactive Publication Date: 2013-03-06
安徽淮寿机械设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process is too complicated, and the overall performance of the manufactured valve body is not good

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] A method for preparing a corrosion-resistant micro-motion valve body includes the following steps:

[0021] a. According to the weight ratio of the following chemical components in the raw materials: C: 2.85-3.2%, Si: 1.2-1.5%, Mn: 0.8-1.2%, P: 0.6-0.8%, S: 0.05-0.07%, Cr 0.25- 0.35%, Cu 0.7-0.9%; heat the valve body blank containing the above components to 650-760°C, keep it for 5-6 hours, cool it to 280-320°C, keep it for 3-5 hours, and then heat it to 650°C -690°C, keep warm for 32 hours, cool to 400°C at 40°C / hour, then cool to room temperature at 20°C / hour;

[0022] b. Milling process: select the cast iron valve body blank with the above-mentioned ingredients in the material, use the special flat pliers valve body to position and clamp the back blank, and then use the disc milling cutter to mill the large plane, leaving 0.3mm machining allowance to ensure the surrounding The thickness difference is not more than 0.015mm;

[0023] c. Drilling process: select the l...

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PUM

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Abstract

The invention discloses a method for producing a corrosion-resistant inching valve body. The method comprises the following steps; a) proportioning raw materials according to the following chemical compositions by weight: 2.85-3.2 percent of C, 1.2-1.5 percent of Si, 0.8-1.2 percent of Mn, 0.6-0.8 percent of P, 0.05-0.07 percent of S, 0.25-0.35 percent of Cr and 0.7-0.9 percent of Cu; heating a valve body blank containing the compositions to 650-760 DEG, performing heat preservation for 5-6 hours, performing furnace cooling until the temperature is 280-320 DEG C, performing heat preservation for 3-5 hours, then heating to 650-690 DEG C, performing heat preservation for 32 hours, cooling to 400 DEG C at the speed of 40 DEG C per hour, and finally cooling to the room temperature at the speed of 20 DEG C per hour; and b) performing a milling procedure, namely selecting a cast iron valve body blank containing the compositions, and positioning and clamping the back surface of the valve body blank by using special flat mouth tongs. The assembly of the inching valve is machined by using advanced equipment; the corrosion resistance is greatly improved, the cutting strength is high, the precision is high, and the production technology is greatly reduced, so that the output is greatly improved, and the product performance is stable.

Description

technical field [0001] The invention relates to a preparation method of a corrosion-resistant micro-motion valve body. Background technique [0002] In the prior art, the micro-motion valve blank for forklifts-painting-rough machining large surface-finishing overall length-rough machining valve hole-finishing valve hole-finishing oil passage hole-finishing oil passage groove-finishing screw hole -finishing oil to plug the head hole-finishing the large surface-removing sharp angles, cleaning-assembly-testing-packing and storage. The technological process is too complicated, and the overall performance of the manufactured valve body is not good. Contents of the invention [0003] The purpose of the present invention is to provide a method for preparing a corrosion-resistant micro-motion valve body. The assembly uses advanced equipment in the processing process; the corrosion resistance is significantly improved, the cutting force is strong, and the precision is high, which ...

Claims

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Application Information

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IPC IPC(8): B23P15/00
Inventor 吕青堂李文宇陈栋
Owner 安徽淮寿机械设备有限公司