Method for controlling brittle phases of titanium and stainless steel electronic beam welding joints adopting composite intermediate layers

A composite intermediate layer and electron beam welding technology, which is applied in the direction of electron beam welding equipment, welding equipment, metal processing equipment, etc.

Inactive Publication Date: 2010-06-09
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing titanium metal material and stainless steel welding method cannot avoid the generation of brittl

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  • Method for controlling brittle phases of titanium and stainless steel electronic beam welding joints adopting composite intermediate layers
  • Method for controlling brittle phases of titanium and stainless steel electronic beam welding joints adopting composite intermediate layers
  • Method for controlling brittle phases of titanium and stainless steel electronic beam welding joints adopting composite intermediate layers

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specific Embodiment approach 1

[0007] Specific embodiment one: In this embodiment, the brittle phase control method of the titanium metal material and the stainless steel electron beam welded joint of the composite intermediate layer is realized through the following steps: 1. Pure vanadium with a thickness of 0.3 to 0.6 mm and a thickness of 0.5 mm ~1.0mm pure copper is placed between the titanium metal material and the stainless steel connection surface as an intermediate layer, so that the pure copper is close to the stainless steel, and then fixed by TIG welding spot welding, so that the gap between each butt surface is less than 0.15mm, that is, the obtained Stainless steel-pure copper-pure vanadium-titanium metal materials (see figure 1 ) to be welded, and the titanium metal material is titanium or titanium alloy; 2. Then, the welded piece is ultrasonically cleaned with acetone, then pickled and washed with water, and then dried; 3. The rigid fixation method is used to process the The weldment is fixe...

specific Embodiment approach 2

[0009] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the thickness of pure vanadium in step 1 is 0.4 mm. Other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0010] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the thickness of the pure vanadium described in step 1 is 0.5 mm. Other steps and parameters are the same as in the first embodiment.

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Abstract

The invention relates to a method for controlling the brittle phases of titanium and stainless steel electronic beam welding joints adopting composite intermediate layers, belonging to the welding field of heterogeneous difficult-welding metal. The invention solves the problem that the tradition metal and stainless steel welding method can not avoid the generation of the brittle phases. The method comprises the following steps of: using pure copper and pure vanadium as the intermediate layers to form members to be welded, wherein the members to be welded consist of stainless steel, pure copper, pure vanadium and titanium, ultrasonically cleaning the members to be welded by acetone, drying the members to be welded after acid washing and water washing, and then performing secondary electronic beam welding in vacuum. The joints obtained by the method have no brittle phases, the tensile strength of the joints is greater than 299 MPa, and the yield strength is greater than 260 MPa. The method is suitable for manufacturing thrust chamber bodies of aircraft engines, nuclear fuel processing equipment in nuclear industry, and titanium/steel composite members and titanium alloy/steel composite members in chemical and medical equipment.

Description

technical field [0001] The invention relates to the welding field of dissimilar refractory metals; in particular, it relates to a method for controlling the brittle phase in the electron beam welding seam of a titanium material using a composite intermediate layer and stainless steel. Background technique [0002] The development of the aerospace industry puts forward higher indicators for the performance of the new generation of engines, requiring a substantial increase in the working pressure and temperature of the thrust chamber of the engine, and at the same time increasing the thrust-to-weight ratio of the engine itself to further enhance its fast maneuverability. Part of the steel body is replaced by titanium alloy and connected with copper alloy for the manufacture of the engine thrust chamber body, which can achieve a partial weight reduction of 10-15%, meeting the high performance of the new generation of liquid oxygen kerosene high-thrust rocket engine and high-alti...

Claims

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Application Information

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IPC IPC(8): B23K15/06B23K15/02B23K103/24
Inventor 王廷张秉刚陈国庆冯吉才刘玉龙
Owner HARBIN INST OF TECH
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