Vacuum electron beam welding method for end face of dissimilar metal electromagnetic valve assembly

A vacuum electron beam and dissimilar metal technology, applied in electron beam welding equipment, welding equipment, metal processing equipment, etc., can solve large thermal stress and tissue stress, increase the difficulty of dissimilar metal welding, and melt welding metallurgical incompatibility And other issues

Active Publication Date: 2022-01-11
GUIZHOU HONGLIN MACHINERY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

A single material has good welding performance, but when dissimilar metals are welded, different metals have significant differences in thermophysical and mechanical properties such as chemical composition, melting point, thermal conductivity, expansion coefficient, and specific heat capacity. Metallurgical incompatibility and large thermal stress and structural stress
The introduction of other alloying elements is easy to produce brittle phases and segregation of phases with different melting points, and it is easy to form crack defects in the joint area, which increases the difficulty of welding dissimilar metals
Moreover, the solenoid valve assembly has airtightness and hydraulic performance requirements, which makes it more difficult to weld the part

Method used

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  • Vacuum electron beam welding method for end face of dissimilar metal electromagnetic valve assembly
  • Vacuum electron beam welding method for end face of dissimilar metal electromagnetic valve assembly
  • Vacuum electron beam welding method for end face of dissimilar metal electromagnetic valve assembly

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Embodiment 1

[0021] Embodiment 1 of the present invention: a certain type of dissimilar metal (DT4E, 15-5PH) electromagnetic valve assembly end face vacuum electron beam welding process, the interference fit of the welding parts, the welding seam penetration requirements of 1.4mm ~ 1.7mm, welding The diameter of the seam is about Φ8.7mm, and the width of the weld seam does not exceed the ring groove with a ring width of 0.8mm. Including the following steps:

[0022] 1) soaking and drying:

[0023] Soak the parts in ExxonMobil ISOPAR L solvent-based cleaning agent for 2.5 hours, dry them with compressed air, then put them in a drying oven, T=120°C, t=1.5 hours, and air-cool. The soaking process is mainly to clean off the residue on the surface of the parts with a cleaning agent. Because there is a small hole in the part valve body (15-5PH), the cleaning agent enters the hole during the cleaning process, so a drying box is used to dry the cleaning agent inside. The purpose of this process...

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Abstract

The invention discloses a vacuum electron beam welding method for the end face of a dissimilar metal electromagnetic valve assembly. The vacuum electron beam welding method comprises the following steps of soaking and drying, demagnetization, positioned welding, seal welding, welding, bench work, heat treatment, washing and inspection. According to the method, quality inspection including macroscopic defect inspection, organization inspection, penetration inspection and the like is carried out on a welded joint of a part subjected to vacuum electron beam welding on the end face of the electromagnetic valve assembly, and the welding quality requirements are all met; and element tests including airtight performance tests, hydraulic performance tests and the like of the electromagnetic valve assembly are carried out, performance verification of an electromagnetic valve product is completed, and the performance requirements of the product are met.

Description

technical field [0001] The invention relates to a vacuum electron beam welding method, in particular to a vacuum electron beam welding method for the end face of a dissimilar metal solenoid valve assembly. Background technique [0002] Solenoid valve components such as figure 1 As shown, the end-to-end welding parts are pole shoe assembly (DT4E) and valve body (15-5PH). DT4E is pure electrical iron with strong magnetism and is suitable for various welding. 15-5PH has good welding performance, less welding deformation and no crack tendency. A single material has good welding performance, but when dissimilar metals are welded, different metals have significant differences in thermophysical and mechanical properties such as chemical composition, melting point, thermal conductivity, expansion coefficient, and specific heat capacity. Metallurgical incompatibility and greater thermal stress and structural stress. The introduction of other alloying elements is easy to produce br...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K15/00B23K15/06
CPCB23K15/0046B23K15/0006B23K15/06
Inventor 黄鑫张娟喻岚唐华黄建斌
Owner GUIZHOU HONGLIN MACHINERY
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