Valve plate surface treating process

A technology of surface treatment and treatment process, applied in the field of valve plate surface treatment process, can solve the problems of hard workpiece, valve plate fracture, affecting production, etc., and achieve the effects of low cost, guaranteed wear resistance, and simple process operation

Inactive Publication Date: 2003-07-30
广州市天河区金棠表面工程技术有限公司
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

The workpiece produced by this production method is hard and brittle, and the main damage form of the valve plate is fracture. In today's high-quality and efficient construction industry, this part seriously affects production and needs to be resolved urgently.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] 1. Preparation of the base material: process according to the requirements of the drawing, and quench and temper with 42CrMo.

[0026] Second, the processing technology, respectively processing the two arcs of the valve plate and the panel:

[0027] (1), deal with the two arcs of the valve plate to solve the impact and wear resistance of the two arcs

[0028] 1. Sandblasting

[0029] Material and process parameters:

[0030] Material: brown corundum sand Particle size: about 14 mesh

[0031] Air pressure: 0.5~0.8Mpa Sandblasting distance: 150~200mm

[0032] Sandblasting angle: 60-75 degrees Spraying time: less than 30min2, one-step spray welding

[0033] ①Equipment: h / 4 spray welding torch produced by Shanghai Welding and Cutting Tool Factory.

[0034] ②Material: Ni60 welding powder produced by Shanghai Stellite.

[0035] ③Process parameters: Oxygen: 7kg / cm 2 1.0m 3 / h;

[0036] Acetylene: 1.2kg / cm 2 1.0m 3 / h

[0037] ④ Coating thickness: 0.8 ...

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Abstract

The valve plate surface treating process includes the preparation of base material, treatment of two sections of arcs and spraying treatment of two planes. The preparation of base material includes machining according to drawings and hardening and tempering of 42CrMo; the treatment of two sections of arcs includes blast spraying and one-step spray welding to solve the problems of making the arcs shock resistant and wear resistant; and the spraying treatment of two planes includes blast spraying and high speed flange spraying to make the two plane wear resistant. The valve plate thus produced is wear resistant and shock resistant and the technological process is simple and low in cost.

Description

Technical field: [0001] The invention relates to a surface treatment process, in particular to a valve plate surface treatment process. Background technique: [0002] A valve plate is installed in the slide valve assembly of the concrete delivery pump of construction machinery, and the valve plate moves up and down in the slide valve assembly at a frequency of about 30 times per minute. When the valve is opened, the concrete delivery channel is opened, and when the valve is closed, the channel is closed. Stop delivering concrete. There are often large stones between the valve plate and the valve seat. When the valve is opened, the stones are either squeezed away or crushed, so the impact force on the valve plate is very large. The valve plate produced by the traditional production method is quenched and tempered with 42CrMo. The workpiece produced by this production method is hard and brittle, and the main damage form of the valve plate is fracture. In today's construction...

Claims

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Application Information

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IPC IPC(8): B05D1/10B23K5/18B24C1/00B24C11/00F16K3/314
Inventor 刘敏
Owner 广州市天河区金棠表面工程技术有限公司
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