Hot isostatic pressure diffusion connection method for tungsten or tungsten alloy and high-strength steel

A hot isostatic pressing diffusion, high-strength steel technology, applied in welding equipment, metal processing equipment, pressure inorganic powder coating, etc. The effect of high tensile strength, good bonding performance and enhanced mechanical properties of welded joints

Inactive Publication Date: 2019-10-08
NO 59 RES INST OF CHINA ORDNANCE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the deposition speed of magnetron sputtering method is slow, the process is complicated, it needs to be prepared in a vacuum environment and has high requirements on the surface of the workpiece, and the cost is high

Method used

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  • Hot isostatic pressure diffusion connection method for tungsten or tungsten alloy and high-strength steel
  • Hot isostatic pressure diffusion connection method for tungsten or tungsten alloy and high-strength steel
  • Hot isostatic pressure diffusion connection method for tungsten or tungsten alloy and high-strength steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A hot isostatic pressure diffusion bonding method for tungsten or tungsten alloy and high-strength steel, using 35CrMnSiA steel with a sample size of Φ60mm×20mm to connect with 91 tungsten-nickel-iron alloy, characterized in that its specific steps are as follows :

[0050] a. Cleaning before welding:

[0051] Use 80#, 200#, 400# and 800# sandpaper to grind the surface to be connected of 35CrMnSiA steel and 91 tungsten-nickel-iron alloy step by step, then put it into acetone for ultrasonic cleaning for 10min, and then dry it. 91 tungsten-nickel-iron alloy sealed preservation;

[0052] b. Preparation of transition layer:

[0053] b-1. Sandblasting the pure tungsten to be sprayed:

[0054] Brown corundum with a particle size of 80 mesh is used as the sandblasting material, the sandblasting angle is 60°, and the compressed gas pressure is 0.8MPa;

[0055] Keep the temperature of the workpiece at 60°C during the blasting process;

[0056] b-2. The workpiece after sandb...

Embodiment 2

[0065] A hot isostatic pressing diffusion bonding method for tungsten or tungsten alloy and high-strength steel, using 60Si2Mn steel with a sample size of Φ30mm×10mm to connect with 99.9% pure tungsten, characterized in that its specific steps as follows:

[0066] a. Cleaning before welding:

[0067] Use 80#, 200#, 400# and 800# sandpaper to grind the surface to be connected between 60Si2Mn steel and 99.9% pure tungsten step by step, then put it into acetone for ultrasonic cleaning for 15 minutes, and then dry it. The cleaned 60Si2Mn steel Sealed with 99.9% pure tungsten;

[0068] b. Preparation of transition layer:

[0069] b-1. 99.9% pure tungsten to be sprayed is sandblasted:

[0070] White corundum with a particle size of 60 mesh is used as the sandblasting material, the sandblasting angle is 60°, and the compressed gas pressure is 0.8MPa;

[0071] Keep the temperature of the workpiece at 75°C during the blasting process;

[0072] b-2. The workpiece after sandblasting...

Embodiment 3

[0081] A hot isostatic pressing diffusion bonding method for tungsten or tungsten alloy and high-strength steel, with sample size such as Figure 4 The 30CrMnSiNi2A steel with the special-shaped curved surface structure shown is connected with 99.9% pure tungsten. It is characterized in that its specific steps are as follows:

[0082] a. Cleaning before welding:

[0083] Use 80#, 200#, 400# and 800# sandpaper to grind the surface to be connected of 30CrMnSiNi2A steel and 99.9% pure tungsten step by step, then put it into acetone for ultrasonic cleaning for 15 minutes, and then dry it. The cleaned 30CrMnSiNi2A steel and 99.9% pure tungsten sealed preservation;

[0084] b. Preparation of transition layer:

[0085] b-1. Sand blasting treatment for 99.9% pure tungsten to be sprayed:

[0086] Brown corundum with a particle size of 40 mesh is used as the sandblasting material, the sandblasting angle is 75°, and the compressed gas pressure is 0.6MPa;

[0087] Keep the temperature...

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Abstract

The invention discloses a hot isostatic pressure diffusion connection method for tungsten or tungsten alloy and high-strength steel. The method mainly comprises the following steps of cleaning beforewelding operation, transition layer preparation and hot isostatic pressure diffusion connection, wherein a cold spraying treatment mode is adopted for the transition layer preparation. The connectionmethod can realize the hot isostatic pressure diffusion connection of samples with special-shaped curved surfaces of an arc surface, a U-shaped surface and the like, can realize the preparation of themultiple layers of transition layers, the bonding performance is good, the connection strength is high, and compared with magnetron sputtering, the method is simpler, more practical and more economical. In addition, by adopting the hot isostatic pressure diffusion connection method, the defects of air holes and the like are overcome, batch production can be realized, the production efficiency ishigh, and the yield is high.

Description

technical field [0001] The invention relates to the field of solid phase welding of dissimilar metals, in particular to a hot isostatic pressure diffusion connection method for tungsten or tungsten alloy and steel. Background technique [0002] Tungsten or tungsten alloy has a series of excellent properties such as high density, high strength, good ductility, good toughness, and small thermal expansion coefficient. It can be used for ammunition cover, sub-munition, armor-piercing projectile, balance weight components on instruments and engines, and shielding materials in nuclear reactors. [0003] The connection of tungsten or tungsten alloy and steel to form a composite component is an important means for the practical engineering application of tungsten or tungsten alloy. Hot isostatic pressure diffusion bonding has the advantages of no pores, macro cracks and other solidification defects, small joint deformation, and good bonding performance. It has become the most suita...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K20/00B23K20/24B23K20/14B23K20/16C23C24/04B23K103/18
CPCB23K20/001B23K20/14B23K20/16B23K20/24B23K2103/18C23C24/045
Inventor 吴护林代野李忠盛丛大龙戴明辉陈大军张隆平李立张敏张昭林
Owner NO 59 RES INST OF CHINA ORDNANCE IND
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