Classifications

• • C—CHEMISTRY; METALLURGY
  • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
  • C22C—ALLOYS
  • C22C18/00—Alloys based on zinc
• • C—CHEMISTRY; METALLURGY
  • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
  • C22C—ALLOYS
  • C22C18/00—Alloys based on zinc
  • C22C18/02—Alloys based on zinc with copper as the next major constituent

Definitions

• a further object of the present invention is to provide an improved zinc base alloy of the foregoing character which, after forming into sheet or strip, can be readily bent and shaped for use in the formation of sheet metal products and which can be radically bent in a complete reverse cold bend without cracking or weakening and which can be severely formed and deep drawn Without stage annealing thereby making the alloy extremely useful for metal fabrication industries such as construction work, sheet metal work, automobile parts, and industrial sheet fabrication in general.
• the alloy composition including amounts of copper, titanium, manganese and chromium is given first, followed by the physical properties measured.
• T temperature in degrees Fahrenheit
• G gauge thickness in inches
• H Rockwell hardness on the 1ST scale
• DD DD.
• B cold bend value represented by the diameter of uncracked 180 bends and multiples of gauge (sheet thickness), and thus the lower values indicate better bending properties with a value of 2 being the maximum or best possible bend
• the zinc base is preferably high grade or special high grade zinc.
• Zinc analyzing at least 99.9% pure is preferred, and satisfactory alloys are obtained from zinc of the grade used in the production of commercial rolled zinc, for example, zinc metal containing as a maximum, .07% lead, .02% iron and .07% cadmium. It is preferred to use high grade zinc having no more than 0.002% iron, and lead and cadmium under 0.005%.
• Alloys produced in accordance with the present invention do not tend to darken excessively upon exposure to the atmosphere or to various combinations of chemicals and lubricants during rolling. Further, an alloy of the composition advocated is capable of withstanding working temperatures as high as 500 F. for extended periods of time without danger of producing grain structure substantially coarser than originally existed and without adversely affecting ductility. The alloy is thus highly amenable to extrusion processes for the production of extruded shapes and to cold working and fabrication.
• a high grade zinc base alloy rolled strip product comprising from about 0.08 to about 0.15% titanium, from about 0.15 to about 0.35% copper, from about 0.001 to about 0.05% chromium, up to about 0.05% manganese, and the balance zinc, said alloy having a dynamic ductility greater than 300 in thicknesses of 0.18" and greater and a cold bend value of 2, and having been subjected to a finishing treatment consisting of hot rolling at a temperature within the range of about 300 F. to about 450 F.

Landscapes

• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• Mechanical Engineering (AREA)
• Metallurgy (AREA)
• Organic Chemistry (AREA)
• Conductive Materials (AREA)
• Heat Treatment Of Sheet Steel (AREA)
• Metal Rolling (AREA)

Priority Applications (5)

Applications Claiming Priority (1)

Publications (1)

Family

ID=21691834

Family Applications (1)

Country Status (5)

Cited By (6)

Families Citing this family (1)

Citations (2)

• 1960
  • 1960-01-05 US US514A patent/US3006758A/en not_active Expired - Lifetime
  • 1960-05-16 ES ES0258144A patent/ES258144A1/es not_active Expired
  • 1960-05-19 BE BE591005A patent/BE591005A/fr unknown
  • 1960-05-27 LU LU38726D patent/LU38726A1/xx unknown
  • 1960-06-01 GB GB19381/60A patent/GB920282A/en not_active Expired

Patent Citations (2)

Also Published As

Similar Documents