US3060017A - Hard facing alloys - Google Patents

Hard facing alloys Download PDF

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Publication number
US3060017A
US3060017A US115314A US11531461A US3060017A US 3060017 A US3060017 A US 3060017A US 115314 A US115314 A US 115314A US 11531461 A US11531461 A US 11531461A US 3060017 A US3060017 A US 3060017A
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US
United States
Prior art keywords
alloy
amounts
carbides
hard facing
alloys
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
US115314A
Inventor
Arthur T Cape
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.)
Coast Metals Inc
Original Assignee
Coast Metals 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 Coast Metals Inc filed Critical Coast Metals Inc
Priority to US115314A priority Critical patent/US3060017A/en
Application granted granted Critical
Publication of US3060017A publication Critical patent/US3060017A/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
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/36—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.7% by weight of carbon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/24—Selection of soldering or welding materials proper
    • B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
    • B23K35/3053—Fe as the principal constituent
    • B23K35/308—Fe as the principal constituent with Cr as next major constituent

Definitions

  • an iron base alloy is described carbon in amounts of from about 1 chromium in amounts of from about 17% to about 27%, molybdenum in amounts of from about 4% to about 10%, cobalt in amounts of from about 5% to about 25%, and silicon in amounts up to about 4%, the remainder of the alloy being substantially all iron, and the alloy being substantially free of tungsten.
  • the carbides in the alloy are of needle-like or needleshaped form. Where the carbides are of this form or shape, there is a tendency for the carbides to grow or merge into each other, thus producing a continuous relatively brittle structure.
  • the carbides in the alloy instead of being of needle-like form or shape, assume the form of euhedral or well-shaped carbides. Where the carbides are in euhedral or Wellshaped form, the carbides are discrete, and there are present in the structure of the alloy no continuous lines or planes of brittleness, so that the alloy resists wear to a greater extent.
  • the alloy owing to this difference in the carbide structure, is able to Withstand more severe impact than the material with the needle-like carbide structure.
  • the alloys fall within the following ranges:
  • An iron-base alloy consisting of carbon in amounts of from about 1 to about 4.5%, chromium in amounts of from about 17% to about 27%, molybdenum in amounts of from about 4% to about 10%, cobalt in amounts of from about 5% to about 25%, nickel in amounts of from about 1% to about 2%, and silicon in amounts up to about 4%, the remainder of the alloy being substantially all iron, said alloy characterized by the fact that the carbides in the alloy are of euhedral form.

Description

United rates Patent C No Drawing. Filed June 7, 1961, Ser. No. 115,314 1 Claim. (Cl. 75128) This invention relates generally to hard facing alloys and to hard castings, but has reference more particularly to improvements in the alloys described in my US. Patent No. 2,801,164.
In the aforesaid which consists of to about 4.5
patent, an iron base alloy is described carbon in amounts of from about 1 chromium in amounts of from about 17% to about 27%, molybdenum in amounts of from about 4% to about 10%, cobalt in amounts of from about 5% to about 25%, and silicon in amounts up to about 4%, the remainder of the alloy being substantially all iron, and the alloy being substantially free of tungsten.
Although the aforesaid alloy has an exceptionally high hardness for the carbon-chromium range which it includes, the carbides in the alloy are of needle-like or needleshaped form. Where the carbides are of this form or shape, there is a tendency for the carbides to grow or merge into each other, thus producing a continuous relatively brittle structure.
I have discovered that by incorporating relatively small amounts of nickel in the alloy, in the range of from about 1% to about 2% nickel, and preferably about 1.5%, the carbides in the alloy, instead of being of needle-like form or shape, assume the form of euhedral or well-shaped carbides. Where the carbides are in euhedral or Wellshaped form, the carbides are discrete, and there are present in the structure of the alloy no continuous lines or planes of brittleness, so that the alloy resists wear to a greater extent. These advantages become more apparent as the carbon content of the alloy increases.
The alloy, owing to this difference in the carbide structure, is able to Withstand more severe impact than the material with the needle-like carbide structure.
In accordance with the invention, the alloys fall Within the following ranges:
It is to be understood that the expression the remainder being substantially all iron, as used in the claim, is to be construed as including any other ingredients or impurities in relatively small or trace amounts, Which are found associated With the various constituents of the alloy, as for example, manganese, sulphur and phosphorus.
Having thus described my invention, I claim:
An iron-base alloy consisting of carbon in amounts of from about 1 to about 4.5%, chromium in amounts of from about 17% to about 27%, molybdenum in amounts of from about 4% to about 10%, cobalt in amounts of from about 5% to about 25%, nickel in amounts of from about 1% to about 2%, and silicon in amounts up to about 4%, the remainder of the alloy being substantially all iron, said alloy characterized by the fact that the carbides in the alloy are of euhedral form.
No references cited.
US115314A 1961-06-07 1961-06-07 Hard facing alloys Expired - Lifetime US3060017A (en)

Priority Applications (1)

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US115314A US3060017A (en) 1961-06-07 1961-06-07 Hard facing alloys

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Application Number Priority Date Filing Date Title
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US3060017A true US3060017A (en) 1962-10-23

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Family Applications (1)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0235310A1 (en) * 1986-02-04 1987-09-09 Institut Po Metalokeramika Overlay welding alloy
US11706684B2 (en) 2015-12-22 2023-07-18 Alfred Consulting LLC System and method for using mobility information in heterogeneous networks

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0235310A1 (en) * 1986-02-04 1987-09-09 Institut Po Metalokeramika Overlay welding alloy
US11706684B2 (en) 2015-12-22 2023-07-18 Alfred Consulting LLC System and method for using mobility information in heterogeneous networks

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