Vacuum brazing material special for titanium cup and processing method and brazing technology thereof

A processing method and technology of brazing material, applied in the direction of metal processing equipment, welding medium, manufacturing tools, etc., to achieve the effect of stable performance

Inactive Publication Date: 2017-01-04
ZHEJIANG HAERS VACUUM CONTAINERS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention is to solve the brazing and sealing problem of the double-layer vacuum titanium cup in the tailless vacuum process, and provides a special vacuum brazing alloy for titanium cups and its processing method and brazing process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Weigh the following components of material:

[0049] PbO 78.4KG;

[0050] TiO 2 10KG;

[0051] B 2 o 3 10KG;

[0052] ZnO 0.5KG;

[0053] SiO 2 0.5KG;

[0054] Al 2 o 3 0.5KG;

[0055] CuO 0.1KG.

[0056] After weighing, place it in a platinum Pt crucible for melting. After the components are completely melted, keep warm at 950°C to 1050°C and perform component homogenization treatment for 40 minutes to obtain a glass solder block; then break the glass solder block into Appropriate particle size, ball milled into powder (black pigment can also be added after ball milling to powder), molded into a flat cylindrical body with an automatic press; finally, the flat cylindrical body enters a tunnel at 400 ° C ~ 420 ° C The furnace is heated for 3 minutes to form a vacuum solder product. The thermal expansion coefficient of the solder produced in this example is (9.5-9.7)*10 at a temperature of 400°C to 420°C -6 / K.

[0057] A kind of vacuum brazing process ...

Embodiment 2

[0069] Weigh the following components of material:

[0070] PbO 85KG;

[0071] TiO 2 5KG;

[0072] B 2 o 3 7.5KG;

[0073] ZnO 1.5KG;

[0074] SiO2 0.8KG;

[0075] al 2 o 3 0.8KG;

[0076] CuO 0.4KG.

[0077] After weighing, place it in a platinum Pt crucible for melting. After the components are completely melted, keep warm at 950°C to 1050°C and perform component homogenization treatment for 40 minutes to obtain a glass solder block; then break the glass solder block into Appropriate particle size, ball milled into powder, and molded into a flat cylindrical body with an automatic press; finally, the flat cylindrical body is heated in a tunnel furnace at 400°C to 420°C for 3 minutes to form a vacuum solder product.

[0078] The brazing process of this embodiment is the same as that of Embodiment 1.

Embodiment 3

[0080] Weigh the following components of material:

[0081] PbO 81.5KG;

[0082] TiO 2 10KG;

[0083] B 2 o 3 5KG;

[0084] ZnO 1.5KG;

[0085] SiO 2 0.8KG;

[0086] al 2 o 3 0.8KG;

[0087] CuO 0.4KG.

[0088] After weighing, place it in a platinum Pt crucible for melting. After the components are completely melted, keep warm at 950°C to 1050°C and perform component homogenization treatment for 40 minutes to obtain a glass solder block; then break the glass solder block into Appropriate particle size, ball milled into powder, and molded into a flat cylindrical body with an automatic press; finally, the flat cylindrical body is heated in a tunnel furnace at 400°C to 420°C for 3 minutes to form a vacuum solder product.

[0089] The brazing process of this embodiment is the same as that of Embodiment 1.

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PUM

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Abstract

The invention provides a vacuum brazing material special for a titanium cup. The vacuum brazing material is composed of 78%-85% of PbO, 5%-10% of TiO2, 5%-10% of B2O3, 0.5%-1.5% of ZnO, 0.5%-0.8% of SiO2, 0.5%-0.8% of Al2O3 and 0.1%-0.5% of CuO. A processing method of the vacuum brazing material special for the titanium cup comprises the following steps that 1, after being weighed proportionally, all the components are put into a Pt crucible to be smelted, after all the components are melted completely, heat is preserved at the temperature of 950-1050 DEG C, the components are subjected to homogenization treatment, and a glass brazing material block is prepared; 2, the glass brazing material block is crushed into particles with the appropriate size, the particles are milled into powder through ball milling, and the powder is subjected to mould pressing, and a flat cylindrical blank body is obtained; and 3, the blank body is fed into a tunnel at the temperature of 400-420 DEG C to be heated for 3 minutes, and a finished product is formed. The vacuum brazing material can be stably and firmly welded to the position at an air extraction opening of a vacuum interlayer of the titanium cup.

Description

technical field [0001] The invention relates to the field of vacuum brazing, in particular to a special vacuum brazing material for titanium cups, a processing method thereof and a brazing process. Background technique [0002] Vacuum brazing means that the workpiece is heated and welded in a vacuum chamber. The double-layer vacuum titanium cup needs to be welded after the vacuum interlayer is vacuumed after the vacuum is exhausted. The vacuum brazing materials currently used are generally glass solder, because the thermal expansion coefficient of the glass solder is (11.5-12.5)*10 -6 / K, compared with the expansion coefficient of the titanium material used to make the titanium cup, there is a large difference. The thermal expansion coefficients of titanium materials used for making titanium cups at different temperatures are shown in the table below: [0003] temperature / ℃ Coefficient of thermal expansion / 10 -6 / K 20 7.6 100 7.6 200 8.9 300...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/26B23K1/008
CPCB23K35/268B23K1/008
Inventor 吕强翁文武
Owner ZHEJIANG HAERS VACUUM CONTAINERS CO LTD
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