GB643367A - Improvements in or relating to the thermal treatment of steel and products thereof - Google Patents

Improvements in or relating to the thermal treatment of steel and products thereof

Info

Publication number
GB643367A
GB643367A GB2916647A GB2916647A GB643367A GB 643367 A GB643367 A GB 643367A GB 2916647 A GB2916647 A GB 2916647A GB 2916647 A GB2916647 A GB 2916647A GB 643367 A GB643367 A GB 643367A
Authority
GB
United Kingdom
Prior art keywords
temperature
per cent
steel
hardness
heating
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
GB2916647A
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.)
ANDERS GOERAN MOLINDER
Uddeholms AB
Original Assignee
ANDERS GOERAN MOLINDER
Uddeholms AB
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 ANDERS GOERAN MOLINDER, Uddeholms AB filed Critical ANDERS GOERAN MOLINDER
Priority to GB2916647A priority Critical patent/GB643367A/en
Priority to DK52348A priority patent/DK73387C/en
Priority to AT174935D priority patent/AT174935B/en
Priority to NL139850A priority patent/NL72513C/xx
Priority to DEP28272A priority patent/DE954702C/en
Publication of GB643367A publication Critical patent/GB643367A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/60—Making other particular articles cutlery wares; garden tools or the like
    • B21D53/64—Making other particular articles cutlery wares; garden tools or the like knives; scissors; cutting blades
    • B21D53/645—Making other particular articles cutlery wares; garden tools or the like knives; scissors; cutting blades safety razor blades
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)

Abstract

643,367. Annealing. MOLINDER, A. G., and UDDEHOLMS AKTIEBOLAG. Oct. 31. 1947, No. 29166. '[Classes 72 and 82(i)] In a thermal treatment of high carbon corrosion-resisting steels containing 0.8 to 1.4 per cent C, and 11-16 per cent Cr, with or without up to 5 per cent in all of S, P, Mn, Si, Mo, W, Sb, N, Co, Ni, Al, Ti, the steel is treated in three steps, viz.: (a) heating to a temperature in excess of its basic hardening temperature, (b) cooling to a temperature below minus 25‹C,(e) heating to between 30‹C. and 200‹C., the exact temperatures and durations of heating being such as to produce the required hardness and the temperature in the first step being below that which produces maximum hardness by the present process. As shown in the curve the steel is heated to a temperature between 1<SP>2</SP> and s above n the basic hardening temperature, i.e. that producing the maximum hardness by the normal hardening and limpering process, but below t the temperature producing maximum hardness by the present process. The temperature, depending on the composition of the steel, is in the range 1060‹C. to 1125‹C. Razor blade steel in strip form having an analysis 1.0 per cent C, 0.25 per cent Si, 1.0 per cent Mn, and 14 per cent Cr may be heated in a continuous furnace to 1100‹C. in a protective atmosphere, e.g., cracked ammonia, cooled to atmospheric temperature between water-cooled metal blocks and then, immediately or within two hours, passed through a bath of methylated spirits cooled to -65‹C to -75‹C by solid carbon dioxide. The strip is then tempered at 110‹C. for one hour to produce a hardness of 820 Vickers units and is stated to be free from brittleness.
GB2916647A 1947-10-31 1947-10-31 Improvements in or relating to the thermal treatment of steel and products thereof Expired GB643367A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB2916647A GB643367A (en) 1947-10-31 1947-10-31 Improvements in or relating to the thermal treatment of steel and products thereof
DK52348A DK73387C (en) 1947-10-31 1948-02-19 Method for heat treatment of carbon-rich, corrosion-resistant steels.
AT174935D AT174935B (en) 1947-10-31 1948-04-06 Process for the heat treatment of corrosion-resistant hardenable steel with a high carbon content
NL139850A NL72513C (en) 1947-10-31 1948-04-09
DEP28272A DE954702C (en) 1947-10-31 1948-11-01 Process for increasing the final hardness in the manufacture of cutting tools from corrosion-resistant strip steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2916647A GB643367A (en) 1947-10-31 1947-10-31 Improvements in or relating to the thermal treatment of steel and products thereof

Publications (1)

Publication Number Publication Date
GB643367A true GB643367A (en) 1950-09-20

Family

ID=10287172

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2916647A Expired GB643367A (en) 1947-10-31 1947-10-31 Improvements in or relating to the thermal treatment of steel and products thereof

Country Status (5)

Country Link
AT (1) AT174935B (en)
DE (1) DE954702C (en)
DK (1) DK73387C (en)
GB (1) GB643367A (en)
NL (1) NL72513C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3183126A (en) * 1960-04-19 1965-05-11 Physical Sciences Corp Method of making magnetic transducers

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3469972A (en) * 1966-01-04 1969-09-30 Sandvikens Jernverks Ab Razor blades and similar thin elongated sharp-edged blades made of a chromium steel
AT401387B (en) * 1994-06-29 1996-08-26 Boehler Ybbstalwerke CORROSION RESISTANT ALLOY AND METHOD FOR PRODUCING CORROSION RESISTANT CUTTERS
CN100352573C (en) 2003-06-26 2007-12-05 皇家飞利浦电子股份有限公司 Bent razor blades and manufacturing of such razor blades

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2197365A (en) * 1936-02-05 1940-04-16 Skf Svenska Kullagerfab Ab Method of producing a hardened steel article
CH217568A (en) * 1939-05-17 1941-10-31 J A Henckels Fa Process for the manufacture of cutlery made of stainless steel.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3183126A (en) * 1960-04-19 1965-05-11 Physical Sciences Corp Method of making magnetic transducers

Also Published As

Publication number Publication date
DK73387C (en) 1951-11-19
AT174935B (en) 1953-05-26
DE954702C (en) 1956-12-20
NL72513C (en) 1953-06-15

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