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A control method for electron beam welding of martensitic stainless steel

A technology of martensitic stainless steel and electron beam welding, which is applied in the direction of electron beam welding equipment, welding equipment, welding/welding/cutting items, etc., can solve the problems of affecting engine manufacturing efficiency, prolonging engine manufacturing cycle, and affecting processing efficiency, etc. Achieve full weld seam, increase residence time, and reduce cooling rate

Active Publication Date: 2019-11-05
AECC AVIATION POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Electron beam welding of martensitic stainless steel often has defects such as pores and air pockets, which seriously affect the processing efficiency, affect the production efficiency of the engine, and prolong the production cycle of the engine to a certain extent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weld the circular weld of the martensitic stainless steel parts to be welded. The thickness of the parts to be welded is 12mm. The specific process of welding is:

[0025] Step 1, place the parts to be welded in a vacuum environment with a vacuum degree of 5*10 -4 mbar.

[0026] Step 2, using an elliptic function to stir the weld pool, wherein the major axis of the elliptic function is in the same direction as the welding direction.

[0027] Step 3, use the horizontal electron beam penetration welding method to weld the parts to be welded. First, perform tack welding on the circular weld seam, and the tack welding spots are firmly welded, and then carry out electron beam welding on the parts, and the welding speed is 10mm / s.

Embodiment 2

[0029] Weld the circular weld of the martensitic stainless steel parts to be welded. The thickness of the parts to be welded is 18mm. The specific process of welding is:

[0030] Step 1, place the parts to be welded in a vacuum environment with a vacuum degree of 5*10 -4 mbar.

[0031] Step 2, using an elliptic function to stir the weld pool, wherein the major axis of the elliptic function is in the same direction as the welding direction.

[0032] Step 3, use the horizontal electron beam penetration welding method to weld the parts to be welded. First, perform tack welding on the circular weld seam, and the tack welding spots are firmly welded, and then carry out electron beam welding on the parts, and the welding speed is 8mm / s.

Embodiment 3

[0034] Weld three circular welds on the martensitic stainless steel parts to be welded. The thickness of the parts to be welded is 20mm. The specific welding process is:

[0035] Step 1, place the parts to be welded in a vacuum environment with a vacuum degree of 4*10 -4 mbar.

[0036] Step 2, using an elliptic function to stir the weld pool, wherein the major axis of the elliptic function is in the same direction as the welding direction.

[0037] Step 3, use the horizontal electron beam penetration welding method to weld the parts to be welded. First, perform tack welding on the circular weld seam, and the tack welding spots are firmly welded, and then carry out electron beam welding on the parts, and the welding speed is 5mm / s.

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Abstract

The invention discloses a martensite stainless steel electron beam welding control method which includes the steps: firstly, placing parts to be welded in the vacuum environment; secondly, mixing a welding pool by the aid of an elliptic function; thirdly, using different welding speeds according to different welding thicknesses, and facilitating air holes and air caves to remove. According to the method, the parts to be welded are welded by the aid of a penetrated welding mode of horizontal electron beams, double-surface forming of the parts are achieved, air holes and air caves generated in the welding process can be effectively decreased, and welding quality and machining efficiency of engine parts are improved.

Description

technical field [0001] The invention belongs to the technical field of electron beam welding, and relates to a control method for electron beam welding of martensitic stainless steel. Background technique [0002] In the manufacture of gas turbines and aero-engines in my country, electron beam welding of martensitic stainless steel is particularly common. Electron beam welding of martensitic stainless steel often has defects such as pores and air pockets, which seriously affect the processing efficiency, affect the production efficiency of the engine, and prolong the production cycle of the engine to a certain extent. How to reduce the generation of pores and air pockets and improve the pass rate of one-time welding is of great significance to the electron beam welding of martensitic stainless steel. Contents of the invention [0003] The object of the present invention is to provide a control method for electron beam welding of martensitic stainless steel. The air holes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K15/00
CPCB23K15/00B23K2103/05
Inventor 韦瑾康文军杨磊王建涛王一迪武建勋李小航杨开龙
Owner AECC AVIATION POWER CO LTD
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