US1206833A - Tool-steel alloy. - Google Patents

Tool-steel alloy. Download PDF

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Publication number
US1206833A
US1206833A US6684015A US6684015A US1206833A US 1206833 A US1206833 A US 1206833A US 6684015 A US6684015 A US 6684015A US 6684015 A US6684015 A US 6684015A US 1206833 A US1206833 A US 1206833A
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US
United States
Prior art keywords
per cent
tool
molybdenum
steel alloy
cobalt
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
US6684015A
Inventor
Radclyffe Furness
Richard H Patch
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.)
MIDVALE STEEL Co
Original Assignee
MIDVALE STEEL Co
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 MIDVALE STEEL Co filed Critical MIDVALE STEEL Co
Priority to US6684015A priority Critical patent/US1206833A/en
Application granted granted Critical
Publication of US1206833A publication Critical patent/US1206833A/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
    • C22C38/30—Ferrous alloys, e.g. steel alloys containing chromium with cobalt

Definitions

  • PENNSYLVANIA ASSIGNORS TO THE MIDVALE STEEL COMPANY, OF PHILADEL- PHIA, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.
  • the steel should contain about .65 per cent. carbon, the proportion of which should not exceed 1 per cent.
  • the steel may contain the usual small percentages of natural alloys or impurities, such as manganese, silicon, titanium, phosphorus and sulfur.
  • the precentage of vanadium, may vary up to 2.5 per cent.; the cobalt should not be less than two per cent. and should not ex- Specification of Letters Patent.
  • the chromium may vary within a range of 2. ⁇ - to 5 per cent., and the molybdenum within a range of from four to eleven per cent.
  • the vanadium may be omitted.
  • the efficiency of the alloy is, however, sufliciently increased by its addition to pay for such addition; but except in degree, the addition of vanadium does not change the essential properties or characteristics of the alloy.
  • a high speed tool steel containing chromium, molybdenum between four and eleven per cent. and cobalt.
  • a high speed tool steel containing the following ingredients in the proportions specified: chromium 2.5 to 5 per cent., molybdenum at to 11 per cent., and cobalt 2 to 20 per cent,
  • a high speed tool steel containing the following ingredients in approximately'the proportions specified: carbon less than one per cent., chromium about A per cent., molybdenum about 8 per cent., and cobalt about 5 per cent.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)

Description

UNITED STATES PATENT OFFICE.
IRAIDGLYIEFE FURNESS, F JENKINTOWN, AND RICHARD H. PATCH, OF PHTLADELPHIA,
PENNSYLVANIA, ASSIGNORS TO THE MIDVALE STEEL COMPANY, OF PHILADEL- PHIA, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.
TOOL-STEEL ALLOY.
No Drawing.
Tocll whom it may concern:
Be it known that we, RADCLYFFE Forums and RICHARD H. PATCH, citizens of the United States, residing, respectively, at J enkintown, county of Montgomery, State of Pennsylvania, and Philadelphia, county of Philadelphia, State of Pennsylvania, have invented a new and useful Improvement in much more uniformly as cutting tools than do the known molybdenum tool steels.
The following is an example of a preferred composition of an alloy embodying our invention: chromium 4.0 per cent., molybdenum 8.0 per cent., vanadium 1.5 per cent., cobalt 5.0 per cent. This is a typical composition and one which careful experiment has shown to give excellent results.
The steel should contain about .65 per cent. carbon, the proportion of which should not exceed 1 per cent. The steel may contain the usual small percentages of natural alloys or impurities, such as manganese, silicon, titanium, phosphorus and sulfur. The precentage of vanadium, may vary up to 2.5 per cent.; the cobalt should not be less than two per cent. and should not ex- Specification of Letters Patent.
Patented Dec. 5, 1916.
Application filed December 14, 1915. Serial No. 66,840.
ceed 20 per cent., the chromium may vary within a range of 2.}- to 5 per cent., and the molybdenum within a range of from four to eleven per cent. The vanadium may be omitted. The efficiency of the alloy is, however, sufliciently increased by its addition to pay for such addition; but except in degree, the addition of vanadium does not change the essential properties or characteristics of the alloy.
Having now fully described our invention, what we claim and desire to protect by Letters Patent is:
1. A high speed tool steel containing chromium, molybdenum between four and eleven per cent. and cobalt.
2. A high speed tool steel containing the following ingredients in the proportions specified: chromium 2.5 to 5 per cent., molybdenum at to 11 per cent., and cobalt 2 to 20 per cent,
1 A high speed tool steel containing the following ingredients in the proportions specified: carbon less than one per cent.,
chromium 2.5 to 5 per cent., molybdenum 4 to 11 per cent., and cobalt 2 to 20 per cent.
4. A high speed tool steel containing the following ingredients in approximately'the proportions specified: carbon less than one per cent., chromium about A per cent., molybdenum about 8 per cent., and cobalt about 5 per cent.
In testimony of which invention, we have hereunto set our hands, at Philadelphia, on this first day ofDecember, 1915. A
RADOLYFFE FURNESS. RICHARD H. PATCH. Witnesses:
Jo's. ENTWISLE,
JAMES THoMPsoN.
US6684015A 1915-12-14 1915-12-14 Tool-steel alloy. Expired - Lifetime US1206833A (en)

Priority Applications (1)

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Applications Claiming Priority (1)

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US6684015A US1206833A (en) 1915-12-14 1915-12-14 Tool-steel alloy.

Publications (1)

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US1206833A true US1206833A (en) 1916-12-05

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Family Applications (1)

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US6684015A Expired - Lifetime US1206833A (en) 1915-12-14 1915-12-14 Tool-steel alloy.

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE762594C (en) * 1936-01-14 1953-04-27 Steirische Gussstahlwerke High performance high speed steel containing cobalt and vanadium

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE762594C (en) * 1936-01-14 1953-04-27 Steirische Gussstahlwerke High performance high speed steel containing cobalt and vanadium

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