EP0283877A1
Expired / Lapsed
EP
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Method of producing clad metal tubes.
Assignee: Nippon Steel Corp
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Filing: 1988-03-11
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Granted: —
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Expires: 2008-03-11
Abstract
Abstract A method of producing clad metal comprises the steps of forming a cladding on the surface of a metal substrate (1) by subjecting powder (2) of a metal which is of a different type from that of the metal substrate (1) and is selected from among Ni-base alloys, Co-base alloys, Ti-base alloys, Fe-base superalloys and stainless steels to hot isostatic pressing under a gas pressure load of not less than 300 kg/cm² at a temperature not higher than the solidus thereof, thereby to obtain a composite material, and elongating the composite material by hot working. Optionally the composite material is subjected to soaking or solution treatment before being subjected to hot working.
Inventors
- 👤 Akihiro C/O Nippon Steel Corp. Miyasaka
- 👤 Hiruyuki c/o Nippon Steel Corp. Ogawa
- 👤 Hiroyuki c/o Nippon Steel Corp. Homma
- 👤 Saburo c/o Nippon Steel Corp. Kitaguchi
- 👤 Hiroshi c/o Nippon Steel Corp. Morimoto
- 👤 Satoshi c/o Nippon Steel Corp. Araki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 22:59
CPC Classifications
C; C22; C22F; C22F1/00; C22F1/10; B; B22; B22F; B22F7/00; B22F7/02; B22F7/04; B22F7/06; B22F7/08; C22F1/16; C22F1/18; C22F1/183; B22F2998/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
92 words
A method of producing clad metal comprising the steps of forming a cladding on the surface of a metal substrate by subjecting powder of a metal which is of a different type from that of the metal substrate and is selected from among Ni-base alloys, Co-base alloys, Ti-base alloys, Fe-base superalloys and stainless steels to hot isostatic pressing under a gas pressure load of not less than 300 kg/cm² at a temperature not higher than the solidus thereof, thereby to obtain a composite material, and elongating the composite material by hot working.
Claim 2
Independent Claim
92 words
A method of producing clad metal comprising the steps of forming a cladding on the surface of a metal substrate by subjecting powder of a metal which is of a different type from that of the metal substrate and is selected from among Ni-base alloys, Co-base alloys, Ti-base alloys, Fe-base superalloys and stainless steels to hot isostatic pressing under a gas pressure load of not less than 300 kg/cm² at a temperature not higher than the solidus thereof, thereby to obtain a composite material, and elongating the composite material by hot working.
Claim 3
Dependent Claim
37 words
A method as defined in claim 1 wherein the powder consists of Ni-base alloy or Co-base alloy and the hot isostatic pressing is carried out at a temperature of 1050 - 1240°C for 0.5 - 10 h.
Claim 4
Dependent Claim
41 words
A method as defined in claim 1 wherein the metal substrate consists of Fe-base alloy, the powder consists of Ti-base alloy and the hot isostatic pressing is carried out at a temperature of 600 - 900°C for 0.5 - 10 h.
Claim 5
Independent Claim
100 words
A method of producing clad metal comprising the steps of forming a cladding on the surface of a metal substrate by subjecting powder of a metal which is of a different type from that of the metal substrate and is selected from among Ni-base alloys, Co-base alloys, Ti-base alloys, Fe-base superalloys and stainless steel to hot isostatic pressing under a gas pressure load of not less than 300 kg/cm² at a temperature not higher than the solidus thereof, thereby to obtain a composite material, subjecting the composite material to soaking, and immediately thereafter elongating the composite material by hot working.
Claim 6
Independent Claim
100 words
A method of producing clad metal comprising the steps of forming a cladding on the surface of a metal substrate by subjecting powder of a metal which is of a different type from that of the metal substrate and is selected from among Ni-base alloys, Co-base alloys, Ti-base alloys, Fe-base superalloys and stainless steel to hot isostatic pressing under a gas pressure load of not less than 300 kg/cm² at a temperature not higher than the solidus thereof, thereby to obtain a composite material, subjecting the composite material to soaking, and immediately thereafter elongating the composite material by hot working.
Claim 7
Dependent Claim
54 words
A method as defined in claim 4 wherein the powder consists of Ni-base alloy or Co-base alloy, the hot isostatic pressing is carried out at a temperature of 1050 - 1240°C for 0.5 - 10 h, and the soaking is carried out at a temperature of 1050 - 1240°C for 0.5 - 10 h.
Claim 8
Dependent Claim
56 words
A method as defined in claim 4 wherein the metal substrate consists of Fe-base alloy, the powder consists of Ti-base alloy, the hot isostatic pressing is carried out at a temperature of 600 - 900°C for 0.5 - 10 h, and the soaking is carried out at a temperature of 550-900°C for 0.5 - 10 h.
Claim 9
Independent Claim
99 words
A method of producing clad metal comprising the steps of forming a cladding on the surface of a metal substrate by subjecting powder of a metal which is of a different type from that of the metal substrate and is selected from among Ni-base alloys, Co-base alloys, Ti-base alloys, Fe-base superalloys and stainless steel to hot isostatic pressing under a gas pressure load of not less than 300 kg/cm² at a temperature not higher than the solidus thereof, thereby to obtain a composite material, subjecting the composite material to solution treatment, and elongating the composite material by hot working.
Claim 10
Independent Claim
99 words
A method of producing clad metal comprising the steps of forming a cladding on the surface of a metal substrate by subjecting powder of a metal which is of a different type from that of the metal substrate and is selected from among Ni-base alloys, Co-base alloys, Ti-base alloys, Fe-base superalloys and stainless steel to hot isostatic pressing under a gas pressure load of not less than 300 kg/cm² at a temperature not higher than the solidus thereof, thereby to obtain a composite material, subjecting the composite material to solution treatment, and elongating the composite material by hot working.
Claim 11
Independent Claim
28 words
A method as defined in claims 1 to 7 wherein both surfaces of the metal substrate are provided with claddings of metals of the same or different types.
Claim 12
Dependent Claim
72 words
A method as defined in claim 7 or 8 wherein the powder consists of Ni-base alloy or Co-base alloy, the hot isostatic pressing is carried out at a temperature of 1050 - 1240°C for 0.5 - 10 h, and the solution treatment is carried out by holding at a temperature of 1050 - 1240°C for 0.5 - 10 h and by rapid cooling at a rate of not less than 5 deg/sec.
Claim 13
Dependent Claim
76 words
A method as defined in claim 7 or 8 wherein the metal substrate consists of Fe-base alloy, the powder consists of Ti-base alloy, the hot isostatic pressing is carried out at a temperature of 600 - 900°C for 0.5 - 10 h, and the solution treatment is carried out by holding at a temperature of 550 - 900°C for 0.5 - 10 h and by rapid cooling at a rate of not less than 5 deg/sec.
References Cited (Backward Citations)
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