公开(公告)号：US3646591A

公开(公告)日：1972-02-29

申请号：US3646591D

申请日：1968-12-18

Applicant: TEXAS INSTRUMENTS INC

Inventor： THOMAS SETH R ,  CLARKE JOHN F

IPC: B23K20/00 ,  G01K5/64 ,  B23K31/02

CPC classification number: B23K20/00 ,  G01K5/64 ,  H01H2037/525

Abstract: A process for making thermostat metals embodying a plurality of oxidizable metal layers such as layers of iron or iron alloy, is shown to comprise the steps of cleaning the surfaces of thin strips of such metals having relatively high and low coefficients of thermal expansion respectively, interfacially contacting the cleaned surfaces of the strips, squeezing the strips together with sufficient reduction of the strip materials to form incipient metallurgical bonds between the strips in the solid phase, and heating the resulting bonded composite material to a sufficiently high temperature for substantially completely dispersing oxides from the interfacially contacted surfaces of the strips into the strip material and for increasing the bonds between the strips by diffusion in the strip materials for substantially completely bonding the interfacially contacted surfaces of the strips together in the solid phase.

公开(公告)号：US3560171A

公开(公告)日：1971-02-02

申请号：US3560171D

申请日：1968-05-01

Applicant: TEXAS INSTRUMENTS INC

Inventor： ORNSTEIN JACOB L ,  HOWARD ERNEST R ,  THOMAS SETH R

IPC: B32B15/01 ,  G01K5/66 ,  B32B15/00

CPC classification number: B32B15/011 ,  G01K5/66 ,  H01H2037/526 ,  H01H2037/528 ,  Y10S428/913 ,  Y10S428/925 ,  Y10T428/12507

Abstract: A THREE-LAYER COMPOSITE THERMOSTAT MATERIAL OF HIGH FLEXIVITY AND ELECTRICAL RESISTIVITY AND LOW COST IS SHOWN TO COMPRISE A LAYER OF METAL OF RELATIVELY HIGH COEFFICIENT OF THERMAL EXPANSION EMBODYING A CHROMIUM-NICKELIRON ALLOY AND A LAYER OF METAL OF RELATIVELY LOW COEFFICIENT OF THERMAL EXPANSION EMBODYING A NICKEL-IRON ALLOY, THESE METAL LAYERS BEING METALLCRIGICALLY BONDED TO OPPOSITE SIDES OF AN INTERMEDIATE METAL LAYER OF STAINLESS STEEL. THE RESISTIVITY, CORROSION RESISTANCE, STRENGTH, WORK-HARDENING PROPERTIES, AND ABILITY TO WITHSTAND HIGH TEMPERATURES OF THE INTERMEDIATE METAL LAYER COOPERATE WITH THE CORRESPONDING CHARACTERISTICS OF THE HIGH AND LOW EXPANSION MATERIALS BONDED THERETO TO PROVIDE AN ECONOMICAL, COMPOSITE THERMOSTAT MATERIAL HAVING A RESISTIVITY, FLEXIVITY, CORROSION RESISTANCE, USEFUL DEFLECTION TEMPERATURE RANGE, STRENGTH, AND ABILITY TO WITHSTAND HIGH TEMPERATURES COMPARABLE TO COMPOSITE THERMOSTAT MATERIALS PREVIOUSLY ACHIEVED ONLY AT SUBSTANTIALLY GREATER COST.