ULTRA-HIGH STRENGTH CRYOGENIC WELDMENTS

• Main Author: FAIRCHILD, DOUGLAS, P
• Format: Patent
• Language: English; French; German
• Published: 04.10.2000
• Edition: 7
• Subjects: ALLOYS; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS INVEHICLES; ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OFTRANSMISSIONS IN VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GASEXHAUST OR FUEL SUPPLY OF PROPULSION UNITS, IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; BLASTING; CHEMISTRY; CLADDING OR PLATING BY SOLDERING OR WELDING; COLD ROOMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; COOLING OR FREEZING APPARATUS NOT COVERED BY ANY OTHERSUBCLASS; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; FERROUS OR NON-FERROUS ALLOYS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED,LIQUEFIED, OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; HEAT PUMP SYSTEMS; HEATING; ICE-BOXES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; LIGHTING; LIQUEFACTION SOLIDIFICATION OF GASES; LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS; MACHINE TOOLS; MANUFACTURE OR STORAGE OF ICE; MECHANICAL ENGINEERING; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METALLURGY; MIXTURES BY PRESSURE AND COLD TREATMENT; PERFORMING OPERATIONS; PIPE-LINE SYSTEMS; PIPE-LINES; REFRIGERATION MACHINES, PLANTS OR SYSTEMS; REFRIGERATION OR COOLING; REFRIGERATORS; SOLDERING OR UNSOLDERING; STORING OF DISTRIBUTING GASES OR LIQUIDS; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; VEHICLES IN GENERAL; VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED ORSOLIDIFIED GASES; WEAPONS; WELDING; WORKING BY LASER BEAM

Welding methods are provided for use in joining ultra-high strength, low alloy steels to produce weldments having tensile strengths greater than about 900 MPa (130 ksi) with weld metals having fracture toughness suitable for cryogenic applications according to known principles of fracture mechanics.