GB491939A - Improvements in gauge tools of steel capable of hardening - Google Patents

Improvements in gauge tools of steel capable of hardening

Info

Publication number
GB491939A
GB491939A GB33128/36A GB3312836A GB491939A GB 491939 A GB491939 A GB 491939A GB 33128/36 A GB33128/36 A GB 33128/36A GB 3312836 A GB3312836 A GB 3312836A GB 491939 A GB491939 A GB 491939A
Authority
GB
United Kingdom
Prior art keywords
hardening
tool
thin layers
pearlite
martensite
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
Application number
GB33128/36A
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.)
Carl Zeiss AG
Original Assignee
Carl Zeiss AG
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 Carl Zeiss AG filed Critical Carl Zeiss AG
Publication of GB491939A publication Critical patent/GB491939A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B1/00—Measuring instruments characterised by the selection of material therefor

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

491,939. Hardening gauges. ZEISS, C., [Firm of]. Dec. 3, 1936, No. 33128. Void. Convention date, Dec. 9, 1935. [Class 72] [Also in Group XIX] In a gauge made of hardenable steel, the main body a of the tool is of martensite of a hardness greater than 25 and less than 65 Rockwell C units, and the working surface b of thin layers of martensite, these being preferably separated from the body a by thin layers d of pearlite. The tool is produced by hardening the tool throughout in the usual manner, tempering at 150-600‹ C. and then hardening the thin layers of the surface b which are then aged at temperatures less than 200‹ C. The thin layer of pearlite is produced by quenching, after hardening, layers of a thickness smaller than that of the previously-heated layer.
GB33128/36A 1935-12-09 1936-12-03 Improvements in gauge tools of steel capable of hardening Expired GB491939A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE491939X 1935-12-09

Publications (1)

Publication Number Publication Date
GB491939A true GB491939A (en) 1938-09-12

Family

ID=6544335

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33128/36A Expired GB491939A (en) 1935-12-09 1936-12-03 Improvements in gauge tools of steel capable of hardening

Country Status (1)

Country Link
GB (1) GB491939A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2541116A (en) * 1943-10-27 1951-02-13 Ohio Crankshaft Co Hardened metallic structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2541116A (en) * 1943-10-27 1951-02-13 Ohio Crankshaft Co Hardened metallic structure

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