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Technique for heating and welding fan prepared from heterogeneic steels

A welding method and dissimilar steel technology, applied in welding equipment, welding equipment, auxiliary welding equipment, etc., can solve problems affecting product quality, easy to generate cracks, high energy consumption, etc., to ensure welding quality, reduce waste, and increase efficiency Effect

Active Publication Date: 2010-12-15
SHANDONG QILU ELECTRIC MOTOR MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems that cracks are easy to occur in the generator rotor fan welding process using dissimilar steel, the energy consumption is large, and the problem of affecting product quality is provided. The dissimilar steel fan heating welding method with the advantages of corresponding to the required temperature, saving energy, improving efficiency, and ensuring welding quality

Method used

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  • Technique for heating and welding fan prepared from heterogeneic steels
  • Technique for heating and welding fan prepared from heterogeneic steels

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0033] The present invention adopts the method of "double preheating and one treatment", that is, preheating before welding twice and intermediate heat treatment once.

[0034] Its method process is:

[0035] 1. Preheating before welding:

[0036] a. (First preheating) Assemble the pressed fan blades with the thin ring of the fan according to the assembly mould, and correct them with a crutch to ensure that the circumference is divided into 12 equal parts, and the machining allowance is guaranteed to be 2~3mm. After the blades are firmly clamped, they are sent to a high-power heating furnace to be heated to 400-500°C and kept warm for more than 2 hours;

[0037] b. Move the above components out of the high-power heating furnace, and weld the fan blades with E5015 welding rods, and the outer side to The final welding temperature shall not be lower th...

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Abstract

A heating and welding technology for the fan made of different kinds of steel includes such steps as pre-heating by two heating furnaces, heating while welding, and heat treating. Said heating furnace is also disclosed.

Description

technical field [0001] The invention relates to a welding method for a generator rotor fan, in particular to a method for heating and welding dissimilar steel fans using medium carbon steel and a boiler plate and a heating furnace used therefor. Background technique [0002] For the welding of dissimilar steel materials, such as the welding of medium carbon steel and boiler plates, the preheating temperature is usually 200-250°C, and the holding time depends on the thickness of the workpiece. After welding, the workpiece is prone to cracks and affects the product. quality. In addition, using one heating furnace for heating in three different stages of preheating, heat preservation, and heat treatment, the working steps are too long, the process is not compact, and the temperature requirements of these stages are very different, which will cause a huge waste of energy. One heating furnace is used for welding heating, the temperature control is difficult, the temperature adju...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D9/00B23K101/00B23K37/00B23K31/02C21D11/00
Inventor 张传林王明彬闫方臣尚晓峰毛云山
Owner SHANDONG QILU ELECTRIC MOTOR MFG