Bearing shaft assembly having a crack resistant weld
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B23K-009/00
출원번호
US-0723910
(2000-11-28)
발명자
/ 주소
Warren, John
Neitzke, Paul
Higgins, Craig
인용정보
피인용 횟수 :
0인용 특허 :
12
초록▼
A welding method that enables the joining of at least two dissimilar, metallic alloys to form a weld that is free of cracks is disclosed. The method incorporates a pure (99.00% minimum by weight) nickel fill-wire, integrally assembled into the joint between the two alloyed metals to be joined. The a
A welding method that enables the joining of at least two dissimilar, metallic alloys to form a weld that is free of cracks is disclosed. The method incorporates a pure (99.00% minimum by weight) nickel fill-wire, integrally assembled into the joint between the two alloyed metals to be joined. The alloys joined by this method are an iron-based, low expansivity, gamma-prime strengthened superalloy (i.e., Incoloy.RTM.) and a high carbon, powder metallurgical tool steel high in refractory metal alloying agents (i.e., CPM REX 20). Welding of the joint results in the formation of a nickel rich region within the weld, thus "inoculating" the weld against cracks. The weld joint formed by the method of the present invention can be used in the fabrication of a rotating anode bearing shaft assembly for use in an x-ray generating device.
대표청구항▼
1. A bearing shaft assembly, comprising a bearing shaft, a hub, and commercially pure nickel incorporated into the joint formed between the bearing shaft and the hub; wherein the desired amount of the commercially pure nickel in the joint comprises approximately 25 wt % of the joint as determined
1. A bearing shaft assembly, comprising a bearing shaft, a hub, and commercially pure nickel incorporated into the joint formed between the bearing shaft and the hub; wherein the desired amount of the commercially pure nickel in the joint comprises approximately 25 wt % of the joint as determined by Energy Dispersive X-ray Spectrometry (EDS) analysis. 2. The bearing shaft assembly in accordance with claim 1, wherein the hub comprises an iron-based, low expansivity, gamma-prime strengthened superalloy. 3. The bearing shaft assembly in accordance with claim 1, wherein the bearing shaft comprises a high carbon, powder metallurgical, cobalt free tool steel. 4. The bearing shaft assembly in accordance with claim 1, wherein the nickel comprises a formed wire. 5. The bearing shaft assembly in accordance with claim 1, wherein the nickel comprises a preformed washer. 6. The bearing shaft assembly in accordance with claim 1, wherein a sufficient quantity of the commercially pure nickel is present in the joint to obtain an iron-to-nickel-ratio (Fe/Ni) of approximately 2 or less for systems that have a combined wt % of iron and nickel equal to or greater than 75 wt % of the joint as determined by EDS analysis. 7. A bearing shaft assembly, comprising a high carbon, powder metallurgical, cobalt free tool steel bearing shaft, an iron-based, low expansivity, gamma-prime strengthened superalloy hub, and commercially pure nickel incorporated into the joint formed between the shaft and the hub; wherein the desired amount of the commercially pure nickel in the joint comprises approximately 25 wt % of the joint as determined by Energy Dispersive X-ray Spectrometry (EDS) analysis. 8. The bearing shaft assembly in accordance with claim 7, wherein the nickel comprises a formed wire. 9. The bearing shaft assembly in accordance with claim 7, wherein the nickel comprises a preformed washer. 10. The bearing shaft assembly in accordance with claim 7, wherein a sufficient quantity of the commercially pure nickel is present in the joint to obtain an iron-to-nickel-ratio (Fe/Ni) of approximately 2 or less for systems that have a combined wt % of iron and nickel equal to or greater than 75 wt % of the joint as determined by EDS analysis.
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이 특허에 인용된 특허 (12)
Gonser Donald I. (Lancaster PA), Alloy bearing for dental scaler.
Magendans Frederik (Eindhoven NLX) van Rheenen Bernhard J. P. (Eindhoven NLX), Method of manufacturing a laminated rotary anode for use in an x-ray tube.
Albrecht David W. ; Matsuda Hiroshi,JPX ; Takahashi Keishi,JPX, Spindle motor with stress alleviating groove provided in hub cylindrical protrusion portion.
Clark Jeffrey J. (Tempe AZ) Fisk Harry R. (Tempe AZ) Wallace Larry A. (Tempe AZ), Weldable nickel base cast alloy for high temperature applications and method.
Fengler Albert F. (Wilton CT) Daly Raymond A. (Fairfield CT) Xu Ming-Wei P. (Stamford CT) Tavoletti Steven (Rye Brook NY) Koller Thomas J. (Shelton CT), X-ray tube rotor structure.
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