Molybdenum-molybdenum brazing and rotary-anode x-ray tube comprising such a brazing

A technology of X-ray tube and rotating anode, which is applied in the direction of X-ray tube, X-ray tube electrode, X-ray tube target material, etc.

Inactive Publication Date: 2007-10-03
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the prior art, this one-piece construction of the shaft blank 116 is necessary because brazing is known not to be resistant to the very aggressive lubricant GaInSn

Method used

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  • Molybdenum-molybdenum brazing and rotary-anode x-ray tube comprising such a brazing
  • Molybdenum-molybdenum brazing and rotary-anode x-ray tube comprising such a brazing
  • Molybdenum-molybdenum brazing and rotary-anode x-ray tube comprising such a brazing

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Embodiment Construction

[0031] Figure 1 is a flow chart illustrating an embodiment of a method according to the invention. The illustrated method starts with step S1. In step S2, a shaft blank having a central hole and made of molybdenum is provided as a first component. In step S3, a star-shaped one-piece radiator is formed in the shaft blank by wire-cut EDM process. Because the shaft blank has a center hole, the wire-cut EDM process can be used to form the heat sink. Subsequently, in step S4, a cover body made of molybdenum is provided as a second component. In step S5, the cover is molybdenum-molybdenum brazed to the shaft blank. A suitable brazing material is, for example, 82 / 18 gold / nickel. One open end of the shaft blank may be closed by brazing a cover to the shaft blank. Finally, at step S6, a plasma sprayed molybdenum layer is provided covering at least a portion of the brazing crevice material. In the present description, it is preferred to cover and thereby protect at least the parts...

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Abstract

The present invention relates to a method for providing a molybdenum-molybdenum or molybdenum aaloy-molybdenum alloy brazing. In accordance with the invention this method comprises the following steps: - providing at least two parts (16, 22) made of molybdenum or a molybdenum alloy; - brazing together said two parts (16, 22) using a brazing material (26); and - providing a plasma-sprayed molybdenum of molybdenum alloy layer (28) at least on a portion of the brazing material (26) that would be accessible otherwise. Furthermore, the present invention is directed to a rotary-anode X-ray tube (14) which is equipped with a spiral groove bearing (12) comprising, as a first part (16), an axle blank (16) having a center bore (18) and being made of molybdenum or a molybdenum alloy and, as a second part (22), a cap (22) made of molybdenum or an molybdenum alloy, wherein, for closing one open axial end (24) of said axle blank (16), said axle blank (16) and said cap (22) are brazed together using the method in accordance with the invention.

Description

technical field [0001] The present invention relates to a method for providing molybdenum-molybdenum brazing or molybdenum alloy-molybdenum alloy brazing, the method comprising the steps of: [0002] Provide at least two components made of molybdenum or molybdenum alloys; and [0003] The above two components are brazed together with a brazing material. [0004] Furthermore, the invention relates to a rotary anode X-ray tube equipped with a helical groove support comprising a shaft blank as a first part and a cover as a second part, wherein the shaft blank has a central hole and is made of molybdenum or a molybdenum alloy Made, the cover is made of molybdenum or molybdenum alloy. Background technique [0005] Without limitation, the above-mentioned brazing may be associated, for example, with helical groove bearings, in particular for high power X-ray tubes. The principle of the helical groove bearing is very similar to the hydroplaning effect on a wet surface. The hydro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K1/00C23C4/12C23C4/06H01J35/10
CPCH01J35/101B23K1/0008C23C4/00C23C4/08H01J9/02H01J2235/081H01J2235/085H01J35/104
Inventor A·K·维特
Owner KONINKLIJKE PHILIPS ELECTRONICS NV
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