US2396552A - Structural element - Google Patents

Structural element Download PDF

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Publication number
US2396552A
US2396552A US519889A US51988944A US2396552A US 2396552 A US2396552 A US 2396552A US 519889 A US519889 A US 519889A US 51988944 A US51988944 A US 51988944A US 2396552 A US2396552 A US 2396552A
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United States
Prior art keywords
alloy
structural element
content
carbon
hardness
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Expired - Lifetime
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US519889A
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Arthur T Cape
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Coast Metals Inc
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Coast Metals Inc
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Publication date
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Priority to US519889A priority Critical patent/US2396552A/en
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C19/00—Alloys based on nickel or cobalt
    • C22C19/03—Alloys based on nickel or cobalt based on nickel
    • C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
    • C22C19/051—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W
    • C22C19/052—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W with the maximum Cr content being at least 40%

Definitions

  • This invention relates generally to alloys, but has reference more particularl to alloys which are especially adapted for hard facing purposes as well as for use in the form of castings.
  • a primary object of the invention is to provide an alloy which is especially useful for hard facing valves and valve seats, but which is useful for other applications in which abrasion and wear at relatively high temperatures is encountered.
  • Another object of the invention is to provide an alloy of the character described which is particularly resistant to the attack of lead oxide and other lead compounds found in or resulting from the combustion of so-called leaded gasoline.
  • An alloy, in accordance with the invention, may contain the following constituents or elements in the stated ranges:
  • a primary consideration is that the nickel content in all cases exceed the chromium content of the alloy.
  • the carbon may be replaced in whole, or in part, by an equivalent or substantially equivalent amount of boron, for the purpose of controlling In most cases, however, a carbon content of from about 1.75% to 2.75% is preferred, a particularly desirable hardness of the alloy being attained within this carbon range.
  • said element being a valve.
  • An alloy of this analysis has a hardness of from about 43 to about 45 Rockwell C scale, and this hardness is maintained even if the carbon content is varied within a range of from about 2% to about 2.75%.
  • Alloys made in accordance with the invention are particularly resistant to the attack of lead oxide and other lead compounds found in or resulting from the combustion of the so-called While the utility of the alloy for hard facing purposes has been emphasized, it is to be understood that the alloy may also be utilized for making castings.
  • a structural element having at least a part which in use is subjected to abrasion and wear at elevated temperatures, and which is capable of resisting the corrosive action of lead oxide at those temperatures, said part comprising an alloy containing from about 35% to about 55% nickel, from about 25% to about 40% chromium, from about 10% to about 20% tungsten, cobalt'in appreciable amounts up to about 12%, and carbon in appreciable amounts up to about 3.5%, the balance of the alloy being substantially all iron, but the iron content in no case being more than 15% of the alloy and the nickel content in all cases being in excess of the chromium content.

Description

the hardness of the alloy.
Patented Mar. 12, 1946 FFICE STRUCTURAL ELEMENT Arthur T. Cape, Columbus, Ohio, asslgnor to Coast Metals, I nc., Canton,
of Delaware Ohio, a corporation No Drawing. Application January 27, 1944,
' Serial No. 519,889
'3 Claims. (Cl. '15171) This invention relates generally to alloys, but has reference more particularl to alloys which are especially adapted for hard facing purposes as well as for use in the form of castings.
A primary object of the invention is to provide an alloy which is especially useful for hard facing valves and valve seats, but which is useful for other applications in which abrasion and wear at relatively high temperatures is encountered.
Another object of the invention is to provide an alloy of the character described which is particularly resistant to the attack of lead oxide and other lead compounds found in or resulting from the combustion of so-called leaded gasoline.
Other objects and advantages will be apparent during the course of the following description.
An alloy, in accordance with the invention, may contain the following constituents or elements in the stated ranges:
A primary consideration is that the nickel content in all cases exceed the chromium content of the alloy.
The carbon may be replaced in whole, or in part, by an equivalent or substantially equivalent amount of boron, for the purpose of controlling In most cases, however, a carbon content of from about 1.75% to 2.75% is preferred, a particularly desirable hardness of the alloy being attained within this carbon range.
While the balance of the allo is stated to be iron in amounts up to about 15%, it is preferred to maintain the iron content below 6%.
A preferred alloy within the reuse stated above has the following approximate analysis:
. said element being a valve.
An alloy of this analysis has a hardness of from about 43 to about 45 Rockwell C scale, and this hardness is maintained even if the carbon content is varied within a range of from about 2% to about 2.75%. v Alloys made in accordance with the invention are particularly resistant to the attack of lead oxide and other lead compounds found in or resulting from the combustion of the so-called While the utility of the alloy for hard facing purposes has been emphasized, it is to be understood that the alloy may also be utilized for making castings. I Having thus described my invention, I claim: 1. A structural element having at least a part which in use is subjected to abrasion and wear at elevated temperatures, and which is capable of resisting the corrosive action of lead oxide at those temperatures, said part comprising an alloy containing from about 35% to about 55% nickel, from about 25% to about 40% chromium, from about 10% to about 20% tungsten, cobalt'in appreciable amounts up to about 12%, and carbon in appreciable amounts up to about 3.5%, the balance of the alloy being substantially all iron, but the iron content in no case being more than 15% of the alloy and the nickel content in all cases being in excess of the chromium content.
v 2. A structural element, as defined in claim 1', in which the carbon is within the range of from about 1.75% to about 2.75%. a v
3. A structural element, as-deflne'd in claim 1,
ARTHUR nears.
US519889A 1944-01-27 1944-01-27 Structural element Expired - Lifetime US2396552A (en)

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2455485A (en) * 1945-04-26 1948-12-07 Electric Steel Foundry Austenitic stainless steel
US2458502A (en) * 1944-06-30 1949-01-11 Coast Metals Inc Structural element for high temperature service use
US2540107A (en) * 1946-09-04 1951-02-06 Blaw Knox Co High-temperature alloys
US2592259A (en) * 1946-03-16 1952-04-08 Phillips Petroleum Co Automatic selector, change-over regulator and indicator device
US2903564A (en) * 1953-03-17 1959-09-08 Edward Valves Inc Method of providing a wear resistant surface
US3171739A (en) * 1963-08-27 1965-03-02 Coast Metals Inc Use of carbonyl nickel in nickel-chromium-tungsten alloys
US3403998A (en) * 1965-02-05 1968-10-01 Blaw Knox Co High temperature alloys
US3607250A (en) * 1970-01-12 1971-09-21 Blaw Knox High-temperature alloys and articles
US3911875A (en) * 1973-03-30 1975-10-14 Semt Cooled exhaust valve for an internal combustion engine
US4331741A (en) * 1979-05-21 1982-05-25 The International Nickel Co., Inc. Nickel-base hard facing alloy
US4491300A (en) * 1981-11-27 1985-01-01 Amsted Industries Incorporated Valve with improved sealing structure
US4754950A (en) * 1984-10-30 1988-07-05 Kabushiki Kaisha Toshiba Valve
US5633094A (en) * 1994-10-28 1997-05-27 Hitachi, Ltd. Valve having facing layers of co-free Ni-base Alloy
WO2000034629A2 (en) * 1998-12-11 2000-06-15 Hitco Carbon Composites, Inc. Carbon-carbon composite valve for high performance internal combustion engines

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2458502A (en) * 1944-06-30 1949-01-11 Coast Metals Inc Structural element for high temperature service use
US2455485A (en) * 1945-04-26 1948-12-07 Electric Steel Foundry Austenitic stainless steel
US2592259A (en) * 1946-03-16 1952-04-08 Phillips Petroleum Co Automatic selector, change-over regulator and indicator device
US2540107A (en) * 1946-09-04 1951-02-06 Blaw Knox Co High-temperature alloys
US2903564A (en) * 1953-03-17 1959-09-08 Edward Valves Inc Method of providing a wear resistant surface
US3171739A (en) * 1963-08-27 1965-03-02 Coast Metals Inc Use of carbonyl nickel in nickel-chromium-tungsten alloys
US3403998A (en) * 1965-02-05 1968-10-01 Blaw Knox Co High temperature alloys
US3607250A (en) * 1970-01-12 1971-09-21 Blaw Knox High-temperature alloys and articles
US3911875A (en) * 1973-03-30 1975-10-14 Semt Cooled exhaust valve for an internal combustion engine
US4331741A (en) * 1979-05-21 1982-05-25 The International Nickel Co., Inc. Nickel-base hard facing alloy
US4491300A (en) * 1981-11-27 1985-01-01 Amsted Industries Incorporated Valve with improved sealing structure
US4754950A (en) * 1984-10-30 1988-07-05 Kabushiki Kaisha Toshiba Valve
US5633094A (en) * 1994-10-28 1997-05-27 Hitachi, Ltd. Valve having facing layers of co-free Ni-base Alloy
WO2000034629A2 (en) * 1998-12-11 2000-06-15 Hitco Carbon Composites, Inc. Carbon-carbon composite valve for high performance internal combustion engines
US6085714A (en) * 1998-12-11 2000-07-11 Hitco Carbon Composites, Inc. Carbon--carbon composite valve for high performance internal combustion engines
WO2000034629A3 (en) * 1998-12-11 2000-12-07 Hitco Carbon Composites Inc Carbon-carbon composite valve for high performance internal combustion engines
US6226866B1 (en) 1998-12-11 2001-05-08 Hitco Carbon Composites, Inc. Method of making carbon-carbon composite valve for high performance internal combustion engines

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