US3865582A - Alloy additive - Google Patents

Alloy additive Download PDF

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Publication number
US3865582A
US3865582A US377140A US37714073A US3865582A US 3865582 A US3865582 A US 3865582A US 377140 A US377140 A US 377140A US 37714073 A US37714073 A US 37714073A US 3865582 A US3865582 A US 3865582A
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US
United States
Prior art keywords
percent
magnesium
composition
iron
ferrous
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US377140A
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English (en)
Inventor
Nathan Lewis Church
Ii John Joseph Debarbadillo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huntington Alloys Corp
Original Assignee
International Nickel Co Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by International Nickel Co Inc filed Critical International Nickel Co Inc
Priority to US377140A priority Critical patent/US3865582A/en
Priority to JP49076873A priority patent/JPS5038618A/ja
Priority to CA204,126A priority patent/CA1036844A/en
Application granted granted Critical
Publication of US3865582A publication Critical patent/US3865582A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C35/00—Master alloys for iron or steel

Definitions

  • the present invention contemplates addition agents containing about 3 to 5.5 percent magnesium, about l9 to 24 percent nickel, about to 28 percent silicon and the balance essentially iron, the iron preferably being not less than 45 percent. Elements such as copper and manganese are not essential. Manganese need not exceed 2 or 3 percent although it can be as high as 12 percent In carrying the invention into practice, should the magnesium be too low, e.g., 2 percent, the addition alloy is rendered too costly since a larger alloy addition would normally be required to produce a given magnesium level in a treated iron, notwithstanding a possibly higher magnesium recovery.
  • magnesium recovery and smoke generation would be expected to be roughly inversely proportional
  • This need not be the case particularly if the nickel content is correlated with the magnesium percentage.
  • nickel promotes an increase in magnesium solubility in the addition agent.
  • magnesium level need not exceed 5.5 percent, it can be present up to 6 or 7 percent.
  • nickel content it need not exceed 23.5 percent although up to about 25 percent can be present. And while it can be as low as 15 or 16 percent, particularly at the lowest magnesium levels, it is deemed that a range of 19.5 to 23.5 percent is most advantageous.
  • a silicon range of 19 or 20 percent to 25 or 27 percent is quite satisfactory. Contributing to these desiderata is a low silicon (added) to magnesium (recovered) ratio. This ratio preferably does not exceed about 12:1 and is desirably less than about 10:1.
  • a number of addition alloys both within and without the invention, were prepared as follows: electrolytic nickel, ferromanganese (when used) and iron were melted together (about 3 percent carbon was added in Alloy l to lower the melting temperature) and small amounts of FeSi were added as required to keep the baths deoxidized and quiet. To assure complete solution of the elements the melts were heated to about 2850 F. and then cooled to about 2600F. whereupon the remainder of the silicon was added.
  • the baths were then cooled to a temperature (about 2350F.) near the freezing point and the magnesium was added either in the form of pure magnesium sticks or 50 Ni-SO Mg master alloy.
  • the alloys were cast into small truncated cone-shaped pig molds (l, 2 and 5 lb. sizes) and subsquently crushed to provide generally uniform equiaxed shaped pieces of roughly k to V; inch in diameter.
  • Addition alloy No. 1 Table I, was added to molten ferrous base nominally of 3.4 percent C, 2 percent Si, .45 percent Mn, Bal. Fe, prepared using pig iron, Armco iron, ferro-manganese and ferrosilicon, and heated to 2,800F.
  • the above-described magnesium addition alloy (enough to provide approximately 0.05 percent Mg to the bath) was placed in a cavity in the bottom of a specially lined treatment ladle (100 lb. melts treated except Alloy l which was 30 lbs.) and the cavity was covered in the case of Alloy l with a A; inch thick steel plate weighing 0.6 lb.
  • a cover crushed FeSi (5050) equal to about 1 percent by weight of the bath was used for the remining addition agents.
  • the iron melt was tapped into the ladle at 2,800F.
  • a camera was used to photographically judge the amount of smoke emmision. In this instance, during tapping into the ladle a still camera was opened and when all visible sign of reaction ceased, the shutter was closed. After the reaction, a chill slug was poured for chemical analysis of magnesium. The bath was poured into a second ladle and innoculated with 0.5 percent S: as standard foundry grade ferrosilicon containing about 85 percent Si. A second chill slug was anaylzed for magnesium.
  • Alloys A, C, D, and E either the S factor, the Si/Mg ratio or cost left something to be desired.
  • a number of them had a desirably low smoke emission factor, S of not more than 0.4, a magnesium recovery of 60 percent or more, and a Si/Mg ratio below about 12.
  • the photograph flare test for Alloy No. 1 indicated the alloy to be less reactive than a number of commercially available additives, although it was difficult to quantitatively determine the result. It is considered that a higher nickel content would have proven beneficial for alloys such as Alloy No. 5 (Mg recovery 48 percent) as evident from Alloy No. 6 (Mg recovery 60 percent). Lowering the magnesium level of Alloy No. 5 would also have likely been helpful.
  • An addition agent containing 19.5 percent to 23.5 percent nickel, 20 to 27 percent silicon, 4 to 5.5 percent magnesium is deemed particularly beneficial.
  • composition of matter in accordance with claim 1 in which a substantial portion of the magnesium is soluble in the composition.
  • a compostiion ofmatter in accordance with claim 2 containing 19.5 to 23.5 percent nickel, 20 to 27 percent silicon, and 4 to 5.5 percent magnesium.
  • composition of matter in accordance with claim 1 containing at least 45 percent iron.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
US377140A 1973-07-06 1973-07-06 Alloy additive Expired - Lifetime US3865582A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US377140A US3865582A (en) 1973-07-06 1973-07-06 Alloy additive
JP49076873A JPS5038618A (2) 1973-07-06 1974-07-04
CA204,126A CA1036844A (en) 1973-07-06 1974-07-05 Alloy additive

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US377140A US3865582A (en) 1973-07-06 1973-07-06 Alloy additive

Publications (1)

Publication Number Publication Date
US3865582A true US3865582A (en) 1975-02-11

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US377140A Expired - Lifetime US3865582A (en) 1973-07-06 1973-07-06 Alloy additive

Country Status (3)

Country Link
US (1) US3865582A (2)
JP (1) JPS5038618A (2)
CA (1) CA1036844A (2)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986002949A1 (fr) * 1984-11-05 1986-05-22 Extramet Industrie S.A. Procede de traitement des metaux et alliages en vue de leur affinage
US20070122302A1 (en) * 2005-11-30 2007-05-31 Scroll Technologies Ductile cast iron scroll compressor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52138416A (en) * 1976-05-13 1977-11-18 Nl Industries Inc Net structure impregnated rare earth metals and production thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2485760A (en) * 1947-03-22 1949-10-25 Int Nickel Co Cast ferrous alloy
US2675308A (en) * 1947-03-22 1954-04-13 Int Nickel Co Art of using magnesium-containing addition agents to produce spheroidal graphite cast iron

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2485760A (en) * 1947-03-22 1949-10-25 Int Nickel Co Cast ferrous alloy
US2675308A (en) * 1947-03-22 1954-04-13 Int Nickel Co Art of using magnesium-containing addition agents to produce spheroidal graphite cast iron

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986002949A1 (fr) * 1984-11-05 1986-05-22 Extramet Industrie S.A. Procede de traitement des metaux et alliages en vue de leur affinage
US20070122302A1 (en) * 2005-11-30 2007-05-31 Scroll Technologies Ductile cast iron scroll compressor
US7431576B2 (en) * 2005-11-30 2008-10-07 Scroll Technologies Ductile cast iron scroll compressor

Also Published As

Publication number Publication date
JPS5038618A (2) 1975-04-10
CA1036844A (en) 1978-08-22

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