US3740214A - Zinc alloy - Google Patents

Zinc alloy Download PDF

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Publication number
US3740214A
US3740214A US00079533A US3740214DA US3740214A US 3740214 A US3740214 A US 3740214A US 00079533 A US00079533 A US 00079533A US 3740214D A US3740214D A US 3740214DA US 3740214 A US3740214 A US 3740214A
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Prior art keywords
weight
zinc
nickel
chromium
purity
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Expired - Lifetime
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US00079533A
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English (en)
Inventor
E Pelze
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Stolberger Zink AG
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Stolberger Zink AG
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    • 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

Definitions

  • My present invention relates to zinc alloys with improved mechanical properties and, more particularly, to a ternary alloy of zinc, chromium and nickel with improved creep resistance and strength properties.
  • high-purity zinc In the discussion below with respect to the composition, reference is made to high-purity zinc. To define this term, it is best to recall that zinc is generally available in a number of grades such as selected, brass special," intermediate, high-grade and special high-grade. The latter two grades are defined for the purposes of the present invention as high-purity zinc.
  • highpurity ⁇ Zinc is zinc which contains a maximum of 0.07% by weight lead, 0.02% by weight iron and 0.07% by weight cadmium. The sum of the lead, iron and cadmium will not exceed 0.10% by weight.
  • the high-purity zinc is the special highegrade zinc as delined by ASTM speciiication B 6-49 and contains at most 0.006% by weight lead, 0.005% by weight iron and 0.004% by Weight cadmium (total lead, iron and cadmium being at most 0.01% by weight).
  • the area of the zinc/ chromium/ nickel ternary composition diagram is the polygon dened by the vertices A, B, C and D wherein:
  • the points A, B, C and D dene lines which constitute phase boundaries and have been observed empirically to define the limits of the operable alloy.
  • the eutectoid of this composition is 0.12% by weight chromium and 0.18% by weight nickel (balance high-purity zinc).
  • the ternary alloy of high-purity zinc, nickel and chromium in spite of its increasing heterogeneity and increasing solidification interval (as the concentration changes in the direction of point D) grows more line-grained, so that the tensile strength increases while the ductility remains. Only when the concentration exceeds that of the point D, i.e. When either 0.5 weight-percent nickel or chromium 4 Examples 6-10 were carried out by extruding the alloy from a molten state at 450 C. to round bars'of 150 mm. diameter. The bars were then hot-pressed at 250 C. and drawn cold to Wire with a diameter of 1.5 mm. In Example 8, 1.7% of the zinc was replaced by copper is exceeded in the composition does this effect cease.
  • a ternary zinc/ nickel/ chromium alloy consisting structure appears to be a pseudoeutectoid in the form essentially of Oto 1.7% by weight copper, and nickel and of fine crystals and aV matrix phase of the ternary eutectic.
  • chromium in amounts within the area ABCD of the draw-
  • the point E described 0.05% by Weight chromium and below is, of course, the eutectic point.
  • region ABEC solidifies ⁇ as -a fine-grained B: crystal structure provides the fatigue strength and tensile 0.20% by Weight chromium and strength, in major part, of the alloy.
  • 'Ihe ternary alloy 0.05% by weight nickel; developing in this range has a tensile strength up to 30 C: kp./mm.2 and is advantageously rolled into bands, sheets 0.05% by weight chromium and and strips.
  • This ternary alloy has a primary segregation ⁇ 0.20% by weight nickel; and of zinc grains in the eutectoid matrix.
  • D
  • phase zone defined by the points C, E and D, 0.45% to 0.55% by weight chromium and the primary precipitate is nickel grains which provide a 0.45% to 0.55 by Weight nickel. fine-grain structure; the latter, as noted, affords high 2.
  • the alloy defined in claim 1 wherein ductility in spite of the increasing solidification interval D and the alloy has been found to be suitable for cold de- 0.50% by weight chromium and formation.
  • phase zone fy defined by the points B, E 0.50% by weight nickel. and D, the primary crystals are of chromium with a fine- 3.
  • the alloy defined in claim 1 having Ia ternary grain structure and permit, in the presence of copper as eutectic point of noted, tensile strength up to 50 kp./mm.2 and tensile 0.12% by weight chromium and strength above 50 lkp./mm.2 in copper-containing alloys 35 0.18% by Weight nickel. according to the invention along the phase boundary DE. 4.
  • Wire drawn from the composition defined in claim 1 duction of wire by drawing. and within the area ADCE of the drawing.
  • the alloys of Examples 1-5 are cast at 450 C. into 2011987 8/1935 Talnton et al 75-"178 R blocks with a thickness of 80 mm. After solidification, 60 1506772 9/1924 Pack 75-178 R the blocks are rolled into ductile high-elongatability FOREIGN PATENTS sheets or bands at a temperature of 250 C. in a number 1,319,535 1/1963 ,France 75 173 R of rolling steps to a thickness of 10 mm. (hot-rolling), thereafter the sheets are rolled in several passes to a L. DEWAYNE RUTLEDGE, Primary Examiner thickness of 1 mm' (cold ⁇ roumg)' 65 L. WEISE, Assistant Examiner In lExample 5, 1.00% of the zinc is replaced by copper, thereby increasing lthe tensile strength to 30 kp./mm.2 without affecting its elongation to break.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Metal Rolling (AREA)
  • Continuous Casting (AREA)
  • Contacts (AREA)
US00079533A 1969-10-25 1970-10-09 Zinc alloy Expired - Lifetime US3740214A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691953783 DE1953783A1 (de) 1969-10-25 1969-10-25 Feinzinklegierung

Publications (1)

Publication Number Publication Date
US3740214A true US3740214A (en) 1973-06-19

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Application Number Title Priority Date Filing Date
US00079533A Expired - Lifetime US3740214A (en) 1969-10-25 1970-10-09 Zinc alloy

Country Status (6)

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US (1) US3740214A (nl)
BE (1) BE754256A (nl)
DE (1) DE1953783A1 (nl)
FR (1) FR2065846A5 (nl)
GB (1) GB1282965A (nl)
NL (1) NL168563C (nl)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998029576A1 (en) * 1997-01-02 1998-07-09 Floridienne Chimie S.A. Zinc alloys yielding anticorrosive coatings on ferrous materials

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998029576A1 (en) * 1997-01-02 1998-07-09 Floridienne Chimie S.A. Zinc alloys yielding anticorrosive coatings on ferrous materials
AU734221B2 (en) * 1997-01-02 2001-06-07 Bammens Groep B.V. Zinc alloys yielding anticorrosive coatings on ferrous materials
US6458425B2 (en) 1997-01-02 2002-10-01 Floridienne Chimine S.A. Zinc alloys yielding anticorrosive coatings on ferrous materials

Also Published As

Publication number Publication date
BE754256A (fr) 1970-12-31
NL168563C (nl) 1982-04-16
DE1953783A1 (de) 1971-05-06
GB1282965A (en) 1972-07-26
FR2065846A5 (nl) 1971-08-06
NL7013739A (nl) 1971-04-27
NL168563B (nl) 1981-11-16

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