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Overlay welding method for small-diameter through-holes

A small aperture and aperture technology, applied in welding equipment, gas flame welding equipment, metal processing equipment, etc., can solve problems such as holes, deep small holes, and cracks in the surfacing layer, so as to ensure quality and reduce difficulty Effect

Active Publication Date: 2011-12-21
上海第一机床厂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (1) The depth of the small hole is deep, the hole diameter is small, and the surfacing operation is difficult;
[0006] (2) The surfacing layer is prone to defects such as cracks and holes;
[0007] (3) The surfacing layer does not reach the specified hardness

Method used

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  • Overlay welding method for small-diameter through-holes
  • Overlay welding method for small-diameter through-holes
  • Overlay welding method for small-diameter through-holes

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Embodiment Construction

[0036] The specific implementation of the surfacing welding method for small-diameter through-holes provided by the present invention will be described in detail below in conjunction with the accompanying drawings.

[0037] See attached figure 1 , for small holes with a hole depth of 30mm to 32mm and an aperture of 14mm to 16.5mm, the present invention provides a method for surfacing welding of small-diameter through-holes. The two ends of the workpiece 1 are respectively surfacing successively. The steps are as follows: The first end 2 of the workpiece 1 is to be surfacing and the first surfacing hole 4 is processed. The aperture is the size required for surfacing, and the hole depth is more than half of the depth of the small aperture to be surfacing. A through hole with a depth of 30mm Take the workpiece 1 as an example, the depth of the hole is 16mm to 18mm, and the maximum aperture is 15.5mm to 16.5mm; the second end 3 of the workpiece 1 is provided with a first vent hole...

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Abstract

The invention relates to a method for overlaying small-aperture through holes, in particular to a method for hardfacing of small-aperture through holes in nuclear power products. In the method, two ends of small-hole workpieces with hole depth of 30 to 32 mm and aperture of 14 to 16.5 mm are overlayed respectively and sequentially; vent holes are formed at the other ends of the processing ends; at early, middle and later stages of the overlaying process, a reasonable thermal treatment process is adopted, so that the quality of the processed overlaying layers is guaranteed and the overlaying layers meeting the requirements of the design specifications are obtained.

Description

technical field [0001] The invention relates to a surfacing welding method for small-diameter through holes, in particular to a wear-resistant surfacing welding method for small-diameter through holes in nuclear power products. Background technique [0002] With the rapid development of the nuclear power industry, the requirement for localization of nuclear power equipment is becoming more and more urgent. In the manufacture of nuclear power products, the wear-resistant surfacing welding of small holes (30mm to 32mm in depth and 14mm to 16.5mm in diameter) has always been one of the bottlenecks restricting the localization of nuclear power products. This type of product is the core action part of nuclear power equipment, and the reliability of its movement is the key to ensure the stability of the reactor function. This type of product is under high temperature, high pressure, and corrosion conditions, and the working surface needs to withstand friction and impact, which re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K5/18B23K5/213
Inventor 王方顾善生单国豪温卫超
Owner 上海第一机床厂有限公司
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