DE29913825U1 - Partially heat-treated knife - Google Patents

Partially heat-treated knife

Info

Publication number
DE29913825U1
DE29913825U1 DE29913825U DE29913825U DE29913825U1 DE 29913825 U1 DE29913825 U1 DE 29913825U1 DE 29913825 U DE29913825 U DE 29913825U DE 29913825 U DE29913825 U DE 29913825U DE 29913825 U1 DE29913825 U1 DE 29913825U1
Authority
DE
Germany
Prior art keywords
cutting edge
knife according
hrc
base body
knife
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
DE29913825U
Other languages
German (de)
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.)
SCHNATZ PETER
Original Assignee
SCHNATZ PETER
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 SCHNATZ PETER filed Critical SCHNATZ PETER
Priority to DE29913825U priority Critical patent/DE29913825U1/en
Publication of DE29913825U1 publication Critical patent/DE29913825U1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/18—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for knives, scythes, scissors, or like hand cutting tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/28—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools
    • B23P15/40—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools shearing tools
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2221/00—Treating localised areas of an article
    • C21D2221/02—Edge parts

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Powder Metallurgy (AREA)

Description

Der Beschreibungstext wurde nicht elektronisch erfaßt The description text was not recorded electronically  

Der Beschreibungstext wurde nicht elektronisch erfaßt The description text was not recorded electronically  

Der Beschreibungstext wurde nicht elektronisch erfaßt The description text was not recorded electronically  

Der Beschreibungstext wurde nicht elektronisch erfaßt The description text was not recorded electronically  

Der Beschreibungstext wurde nicht elektronisch erfaßt The description text was not recorded electronically  

Der Beschreibungstext wurde nicht elektronisch erfaßt The description text was not recorded electronically  

Der Beschreibungstext wurde nicht elektronisch erfaßt The description text was not recorded electronically  

Der Beschreibungstext wurde nicht elektronisch erfaßt The description text was not recorded electronically  

Der Beschreibungstext wurde nicht elektronisch erfaßt The description text was not recorded electronically  

Der Beschreibungstext wurde nicht elektronisch erfaßt The description text was not recorded electronically  

Der Beschreibungstext wurde nicht elektronisch erfaßt The description text was not recorded electronically  

Der Beschreibungstext wurde nicht elektronisch erfaßt The description text was not recorded electronically  

Der Beschreibungstext wurde nicht elektronisch erfaßtThe description text was not recorded electronically

Claims (10)

1. Partiell wärmebehandeltes Messer aus Stahl mit einer gehärteten Schneide (1) und mit einem Befestigungs­ löcher (3) aufweisenden Grundkörper (2), der im Vergleich mit der Schneide (1) eine niedrigere Härte aufweist, dadurch gekennzeichnet, daß der Grundkörper (2) ein aus im Zerfall begiffenen Marten­ sit und Sekundärcarbiden bestehendes Gefüge oder ein Gefüge aus durch Mischkristallbildung verfestigten Austenit mit feinstausgeschiedenen Sondercarbiden aufweist.1. Partially heat-treated steel knife with a hardened cutting edge ( 1 ) and with a fastening holes ( 3 ) having a base body ( 2 ), which has a lower hardness compared to the cutting edge ( 1 ), characterized in that the base body ( 2 ) has a structure consisting of martensite and secondary carbides, or a structure of austenite solidified by mixed crystal formation with finely separated special carbides. 2. Messer nach Anspruch 1, dadurch gekennzeichnet, daß der Grundkörper (2) im Bereich seines Rückens (4) eine Härte (H) von etwa 45 bis 51 HRC, vorzugsweise von etwa 47 bis 48 HRC aufweist.2. Knife according to claim 1, characterized in that the base body ( 2 ) in the region of its back ( 4 ) has a hardness (H) of approximately 45 to 51 HRC, preferably of approximately 47 to 48 HRC. 3. Messer nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die gehärtete und vorzugsweise nach dem Härten angelassene Schneide (1) eine Härte (H) von etwa 57 bis 66 HRC, vorzugsweise von etwa 60 ± 2 HRC, aufweist.3. Knife according to claim 1 or 2, characterized in that the hardened and preferably tempered cutting edge ( 1 ) has a hardness (H) of about 57 to 66 HRC, preferably of about 60 ± 2 HRC. 4. Messer nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Schneide (1) ein Gefüge mit mindestens 80 Prozent Martensitanteil aufweist.4. Knife according to one of claims 1 to 3, characterized in that the cutting edge ( 1 ) has a structure with at least 80 percent martensite. 5. Messer nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß in einem Übergangsbereich zwischen dem Gefüge des Grund­ körpers (2) und der gehärteten Schneide (1) ein mittlerer Härtegradient mindestens 1,7 HRC/mm, vor­ zugsweise mindestens 2,0 HRC/mm beträgt.5. Knife according to one of claims 1 to 4, characterized in that in a transition region between the structure of the basic body ( 2 ) and the hardened cutting edge ( 1 ) an average hardness gradient of at least 1.7 HRC / mm, preferably at least 2, 0 HRC / mm. 6. Messer nach Anspruch 5, dadurch gekennzeichnet, daß der Übergangsbereich in Richtung einer Breitenabmessung (B) gemessen eine Größe von etwa 8 bis 10 mm aufweist.6. Knife according to claim 5, characterized in that the Transition area in the direction of a width dimension (B) measured has a size of about 8 to 10 mm. 7. Messer nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß der Grundkörper (2) und die Schneide (1) aus einem ledebu­ ritischen Chromstahl hergestellt sind.7. Knife according to one of claims 1 to 6, characterized in that the base body ( 2 ) and the cutting edge ( 1 ) are made of a ledebu ritische chrome steel. 8. Messer nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß der Grundkörper (2) und die Schneide (1) aus einem pulver­ metallurgisch hergestellten Stahl hergestellt sind.8. Knife according to one of claims 1 to 6, characterized in that the base body ( 2 ) and the cutting edge ( 1 ) are made of a powder metallurgically produced steel. 9. Messer nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß der Grundkörper (2) und die Schneide (1) aus einem Schnellarbeitsstahl hergestellt sind. 9. Knife according to one of claims 1 to 8, characterized in that the base body ( 2 ) and the cutting edge ( 1 ) are made of high-speed steel. 10. Messer nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß die Befestigungslöcher (3) als Bohrungen, vorzugsweise als Gewindebohrungen, insbesondere mit konischen oder zylindrischen Ansenkungen, ausgeführt sind.10. Knife according to one of claims 1 to 9, characterized in that the fastening holes ( 3 ) are designed as bores, preferably as threaded bores, in particular with conical or cylindrical counterbores.
DE29913825U 1999-08-07 1999-08-07 Partially heat-treated knife Expired - Lifetime DE29913825U1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE29913825U DE29913825U1 (en) 1999-08-07 1999-08-07 Partially heat-treated knife

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE29913825U DE29913825U1 (en) 1999-08-07 1999-08-07 Partially heat-treated knife

Publications (1)

Publication Number Publication Date
DE29913825U1 true DE29913825U1 (en) 1999-10-14

Family

ID=8077231

Family Applications (1)

Application Number Title Priority Date Filing Date
DE29913825U Expired - Lifetime DE29913825U1 (en) 1999-08-07 1999-08-07 Partially heat-treated knife

Country Status (1)

Country Link
DE (1) DE29913825U1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7784143B1 (en) * 2005-03-11 2010-08-31 Kc Holdings, Llc Apparatus for building tools
US9051744B1 (en) 2005-03-11 2015-06-09 Exceptional Ip Holdings, Llc Hand held building tools

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7784143B1 (en) * 2005-03-11 2010-08-31 Kc Holdings, Llc Apparatus for building tools
US8286297B1 (en) 2005-03-11 2012-10-16 Exceptional Ip Holdings, Llc Hand held building tools
US9051744B1 (en) 2005-03-11 2015-06-09 Exceptional Ip Holdings, Llc Hand held building tools
US10309114B1 (en) * 2005-03-11 2019-06-04 Exceptional Ip Holdings, Llc Hand held building tools

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Legal Events

Date Code Title Description
R207 Utility model specification

Effective date: 19991118

R150 Term of protection extended to 6 years

Effective date: 20021204

R157 Lapse of ip right after 6 years

Effective date: 20060301