Diffusion welding method of titanium or titanium alloy and stainless steel

A technology of titanium alloy and stainless steel, applied in the field of diffusion welding, which can solve the problems of high processing cost of micron-sized copper foil, high cost of intermediate layer, reduction of corrosion resistance and continuity of joints, etc.

Inactive Publication Date: 2011-10-19
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, considering that the addition of the third material intermediate layer often reduces the corrosion resistance of the joint and the continuity of the joint performance transition, and the processing cost of the micron-sized copper foil used in the intermediate layer is relatively high, so this method is used in most case is not allowed
[0006] The Chinese patent "An Active Composite Gradient Barrier Diffusion Welding Method for Titanium-Al-Based Alloy and

Method used

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  • Diffusion welding method of titanium or titanium alloy and stainless steel
  • Diffusion welding method of titanium or titanium alloy and stainless steel
  • Diffusion welding method of titanium or titanium alloy and stainless steel

Examples

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Embodiment 1

[0025] This embodiment is a method for diffusion welding of TA1 industrial pure titanium and 00Cr19Ni10 stainless steel, and its specific process includes the following steps:

[0026] Step 1, cleaning the surface of the plate; select several pieces of TA1 industrial pure titanium plate and 00Cr19Ni10 stainless steel plate with a thickness of 2mm as the raw materials for preparing the middle layer of the structure. Use metallographic sandpaper to polish the surface of the plate to make the surface roughness Ra≤1.6μm. Afterwards, immerse the processed plate in acetone for ultrasonic cleaning for 5 minutes, and dry it with cold air to obtain cleaned TA1 industrial pure titanium plate and 00Cr19Ni10 stainless steel plate. Ultrasonic power is 600W.

[0027] Step 2, stacking the block body to be welded; stacking the treated TA1 industrial pure titanium plate 3 and 00Cr19Ni10 stainless steel plate 4 alternately in the manner of one TA1 industrial pure titanium plate, one 00Cr19Ni10...

Embodiment 2

[0033] Present embodiment is a kind of method of TA2 industrial pure titanium and 1Cr18Ni9Ti stainless steel diffusion welding, and its specific process comprises the following steps:

[0034] Step 1, cleaning the surface of the plate; select several pieces of TA2 industrial pure titanium plate and 1Cr18Ni9Ti stainless steel plate with a thickness of 3mm as the raw materials for preparing the structural middle layer. Use metallographic sandpaper to polish the surface of the plate to make the surface roughness Ra≤1.6μm. Afterwards, immerse the processed plate in acetone and ultrasonically clean it for 5 minutes, and dry it with cold air to obtain cleaned TA2 industrial pure titanium plate and 1Cr18Ni9Ti stainless steel plate. Ultrasonic power is 600W.

[0035] Step 2, stacking the block body to be welded; the processed TA2 industrial pure titanium plate 3 and 1Cr18Ni9Ti stainless steel plate 4 are stacked alternately in the manner of a 1Cr18Ni9Ti stainless steel plate, a TA2 i...

Embodiment 3

[0041] Present embodiment is a kind of method of TA7 titanium alloy and 0Cr18Ni9 stainless steel diffusion welding, and its specific process comprises the following steps:

[0042] Step 1, cleaning the surface of the plate; selecting several TA7 titanium alloy plates and 0Cr18Ni9 stainless steel plates with a thickness of 2mm as the raw materials for preparing the structural middle layer. Use metallographic sandpaper to polish the surface of the plate to make the surface roughness Ra≤1.6μm. After that, immerse the processed plate in acetone for ultrasonic cleaning for 5 minutes, and dry it with cold air to obtain cleaned TA7 titanium alloy plate and 0Cr18Ni9 stainless steel plate. Ultrasonic power is 600W.

[0043] Step 2, stacking the block body to be welded; stacking the treated TA7 titanium alloy plate 3 and 0Cr18Ni9 stainless steel plate 4 alternately in the manner of one TA7 titanium alloy plate, one 0Cr18Ni9 stainless steel plate, and one TA7 titanium alloy plate to for...

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Abstract

The invention discloses a diffusion welding method of titanium or titanium alloy and stainless steel. A plate pack having the same material quality with welded workpieces is welded into a block structure in advance. The plate pack is lengthways cut into slices along the block structure to form a structural middle layer 7. The middle layer is processed and then vertically arranged between the welded workpieces for diffusion welding. Because the middle layer having the same material quality with the workpiece is adopted, a joint heterogeneous interface combination mode is changed into a combination mode that half heterogeneous workpieces are directly combined and half heterogeneous workpieces are combined, and the titanium or titanium alloy and stainless steel workpieces are in high-intensity connection. In the diffusion welding method, the tensile strength of the joint is improved to above 80% from 50-70%(week side workpiece intensity) obtained by the direct diffusion welding technology, and various types of titanium or titanium alloy and stainless steel can be in high-intensity connection.

Description

technical field [0001] The invention relates to a diffusion welding method, in particular to a diffusion welding method of titanium or titanium alloy and stainless steel. Background technique [0002] Titanium or titanium alloys have high specific strength, excellent corrosion resistance and good processability, and are widely used in aerospace, medical, metallurgy and other fields, and are known as the third rising contemporary metal. However, the primary problem limiting the application and promotion of titanium alloys is the high price. The price of stainless steel is relatively low, and it is a more commonly used material in industry. Composite components of titanium or titanium alloy and stainless steel can give full play to their complementary advantages in performance and economy, and have broad application prospects in aerospace, national defense and chemical industries. [0003] Vacuum diffusion welding is a precise solid-phase joining method, which means that und...

Claims

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Application Information

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IPC IPC(8): B23K20/02B23K20/24B23K20/22
Inventor 熊江涛李鹏李京龙张赋升
Owner NORTHWESTERN POLYTECHNICAL UNIV
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