DE851815C - Improvement of the machinability of materials - Google Patents

Improvement of the machinability of materials

Info

Publication number
DE851815C
DE851815C DEB5389D DEB0005389D DE851815C DE 851815 C DE851815 C DE 851815C DE B5389 D DEB5389 D DE B5389D DE B0005389 D DEB0005389 D DE B0005389D DE 851815 C DE851815 C DE 851815C
Authority
DE
Germany
Prior art keywords
materials
machinability
improvement
machining
minus
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
DEB5389D
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.)
Gebrueder Boehler and Co AG
Original Assignee
Gebrueder Boehler and Co 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 Gebrueder Boehler and Co AG filed Critical Gebrueder Boehler and Co AG
Priority to DEB5389D priority Critical patent/DE851815C/en
Application granted granted Critical
Publication of DE851815C publication Critical patent/DE851815C/en
Expired 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/04—Hardening by cooling below 0 degrees Celsius
    • 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
    • B23P25/00—Auxiliary treatment of workpieces, before or during machining operations, to facilitate the action of the tool or the attainment of a desired final condition of the work, e.g. relief of internal stress

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Heat Treatment Of Articles (AREA)

Description

Verbesserung der Zerspanbarkeit von Werkstoffen Es ist bekannt, daß die Zerspanbarkeit der meisten Werkstoffe, insbesondere der Eisen- und Nichteisenmetalle, mit steigender Zähigkeit schlechter wird. Zur Verbesserung der Zerspanbarkeit wurde deshalb auch schon vorgeschlagen, die Werkstoffe einer Wärmebehandlung zu unterwerfen, um z. B. durch eine dadurch erzielte Anlaßsprödigkeit ein leichteres Zerspanen zu ermöglichen.Improving the machinability of materials It is known that the machinability of most materials, especially ferrous and non-ferrous metals, gets worse with increasing toughness. To improve machinability, therefore it has already been proposed to subject the materials to a heat treatment, to z. B. an easier machining due to a resulting brittleness enable.

Erfindungsgemäß wird nun zur Verbesserung der Zerspanbarkeit ein neuer Weg eingeschlagen, der eine weitaus höhere Versprödung erreichen läßt. Die zu bearbeitenden Teile werden auf Minustemperaturen, z. B. minus 7o bis minus i 8o° C, unterkühlt. Bei diesen tiefen Temperaturen beträgt die Kerbzähigkeit der meisten Werkstoffe nur mehr 1/l0 bis 1/.0 der Kerbzähigkeit bei Raumtemperatur. Da die Festigkeit gleichzeitig wesentlich steigt, ist mit den gebräuchlichen Mitteln ein leichtes Zerspanen möglich. Die vorübergehende Überführung der Werkstücke in den versprödeten Zustand ist ohne Einfluß auf ihre Eigenschaften bei Raumtemperatur, d. h. es stellt sich der frühere Zustand wieder ein. Dadurch ist es möglich, eine Wärmebehandlung, wenn erwünscht, auch schon vor der Zerspanung vorzunehmen und die Stücke in geglühtem oder vergütetem Zustand zu bearbeiten.According to the invention, a new one is now used to improve the machinability Taken a path that allows a much higher degree of embrittlement to be achieved. The ones to be edited Parts are kept at sub-zero temperatures, e.g. B. minus 7o to minus i 8o ° C, supercooled. The notch toughness of most materials is at these low temperatures only 1/10 to 1 / .0 of the notch toughness at room temperature. Because the strength at the same time increases significantly, easy machining is possible with the usual means. The temporary transfer of the workpieces into the embrittled state is without Influence on their properties at room temperature, d. H. the earlier one arises State back on. This makes it possible to carry out a heat treatment, if desired, to be carried out even before machining and the pieces in annealed or quenched and tempered Edit state.

Die Unterkühlung der Werkstücke ist auf verschiedene Art möglich. Kleinere Stücke können in einer Durchlaufkühlvorrichtung unterkühlt und anschließend zerspant werden. Größere Teile können mit einer Kühlflüssigkeit während des Zerspanungsvorgang.es örtlich abgekühlt werden. Wie Versuche ergeben haben, reicht die Dauer der Unterkühlung für den Bearbeitungsvorgang im allgemeinen völlig aus.The workpieces can be subcooled in various ways. Smaller pieces can be subcooled in a continuous cooling device and then be machined. Larger parts can be treated with a coolant during the machining process locally cooled. As tests have shown, the duration of hypothermia is sufficient for the machining process in general completely.

Als weiterer Vorteil ergab sich bei der Zerspanung, daß die Beanspruchung der Schneiden durch die Arbeit auf unterkühltem Werkstoff eine wesentlich geringere war, da die Temperatur des ablaufenden Spanes eine geringere ist.Another advantage of the machining was that the stress cutting by working on supercooled material essential was lower because the temperature of the chip being discharged is lower.

Claims (2)

PATENTANSPRÜCHE: i. Verfahren zur Verbesserung der Zerspanbaxkeit von Werkstoffen, insbesondere von Eisen- und Nichteisenmetallen, dadurch gekennzeichnet, dal3@ die Werkstoffe für die Zerspanung auf Minustemperaturen unterkühlt werdet. PATENT CLAIMS: i. Method for improving the machinability of materials, in particular of ferrous and non-ferrous metals, characterized in that the materials for machining are subcooled to minus temperatures. 2. Verfahren nach Anspruch i, dadurch gekennzeichnet, daß die Werkstücke auf minus 70 bis minus i8o° C unterkühlt werden.2. The method according to claim i, characterized in that the workpieces to minus 70 to minus 18o ° C.
DEB5389D 1944-03-10 1944-03-10 Improvement of the machinability of materials Expired DE851815C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEB5389D DE851815C (en) 1944-03-10 1944-03-10 Improvement of the machinability of materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB5389D DE851815C (en) 1944-03-10 1944-03-10 Improvement of the machinability of materials

Publications (1)

Publication Number Publication Date
DE851815C true DE851815C (en) 1952-10-09

Family

ID=6953983

Family Applications (1)

Application Number Title Priority Date Filing Date
DEB5389D Expired DE851815C (en) 1944-03-10 1944-03-10 Improvement of the machinability of materials

Country Status (1)

Country Link
DE (1) DE851815C (en)

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