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Kaltlaufstellen

English translation: cold lap


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GLOSSARY ENTRY (DERIVED FROM QUESTION BELOW)
German term or phrase:Kaltlaufstelle
English translation:cold lap
Entered by: Ilka Nahmmacher
Options:
- Contribute to this entry
- Include in personal glossary

13:13 Feb 16, 2010
German to English translations [PRO]
Tech/Engineering - Metallurgy / Casting
German term or phrase: Kaltlaufstellen
Es geht um einen Materialfehler, der im Druckgussverfahren entstehen kann.

"Zulässig , jedoch nur leichte oberflächliche Kaltlaufstellen welche nur geringfügig ausgeprägt sind und nicht in das Kermaterial reichen. "

Hier ist ein Link auf eine Seite, die diese Art Fehler beschreibt:
http://giesserei-praxis.schiele-schoen.de/110/7464/gip204083...
Ilka Nahmmacher
Local time: 10:54
cold shuts
Explanation:
Ich glaube, dass hier die Rede von Kaltschweißstellen ist, daher
cold shut (metallurgy)
A surface defect of a metal casting in the form of a discontinuity where two streams failed to unite. Also known as cold lap.
http://encyclopedia2.thefreedictionary.com/cold shut
Kaltschweißstelle f <qualit.mat> (Gieß- oder Schmiedefehler) cold shut; cold lap
Langenscheidt

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Note added at 15 Min. (2010-02-16 13:28:51 GMT)
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Cold Shut
Casting defect caused by imperfect fusing or discontinuity of molten metal coming together from opposite directions in a mold, or due to folding of the surface. It may have the appearance of a crack or seam with smooth, rounded edges. Also see Cold Lap.
http://www.sfsa.org/sfsa/glossary/deftrmcc.php

--------------------------------------------------
Note added at 21 Stunden (2010-02-17 11:03:43 GMT)
--------------------------------------------------

Hier einige Definitionen:
Kaltlauf wird durch vorzeitige Erstarrung der Schmelze heim Gießen hervorgerufen. z. B. als Folge einer zu geringen Gieß- oder Formentemperatur oder einer zu niedrigen Gießböhe bzw. Gießgeschwindigkeit.
Außerdem entstehen Kaltfließstellen (Druckguß) dadurch. dass während der Formfüllung einzelne Bereiche der Schmelze ganz oder teilweise erstarren, z. B. bei zu langsamer Formfüllung, zu langen Fließwegen oder zu dünnen Anschnitten (die während der Formfüllung teilweise einfrieren und dadurch den verfügbaren Strömungsquerschnitt verengen). Es können auch Überschichtungcn auftreten, wenn sich die bei der Formfüllung erstarrte Randschale ablöst und flüssiges Metall in den Spalt zwischen Randschale und Formwand einfließt.
http://books.google.de/books?id=_-TNRXz3XtcC&pg=PA161&lpg=PA...
cold lap. < I) Wrinkled markings on ihe surface of an ingot or casting from incipient freezing of the surface and loo low a cast-
ing temperature. (2) A flaw that results when a workpiece fails to fill the die cavity during the first forging A seam is formed as subsequent dies force metal over this gap to leave a seam on the workpiece surface. See also coldshut.
cold shut. 1) A discontinuity that appears on the sutface of cast metal as a result of two streams of liquid meeting and failing
to unite. (2) A lap on the surface of a forging or billet that was closed without fusion during deformation. (3) Freezing of the top surface of an ingot before the mold is full.
http://books.google.de/books?id=9ohkDUryVZ0C&pg=PA17&lpg=PA1...
Selected response from:

Bernd Runge
Germany
Local time: 10:54
Grading comment
I decided for "cold lap", thanks.
4 KudoZ points were awarded for this answer



Summary of answers provided
4pull-ins
Virgil Tech Eng
2 +1cold shuts
Bernd Runge
1shrinkage cavities
andres-larsen


  

Answers


1 hr   confidence: Answerer confidence 1/5Answerer confidence 1/5
shrinkage cavities


Explanation:
"Permitted, but only slightly pronounced superficial (die cast solidification) ***shrinkage cavities*** which do not reach into the core material."

Quellen:

shrinkage cavity: Definition from Answers.com - shrinkage cavity ( ′shriŋkij ′kavədē ) ( metallurgy ) A cavity resulting from shrinkage during.
www.answers.com/topic/shrinkage-cavity -

central lubrication - German translation – Linguee - During the first run of a diesel locomotive's engine a shrinkage cavity in the ... oberhalb der Zentralschmierung eine Kaltlaufstelle im Guss festgestellt, ...
www.linguee.com/.../central lubrication.html -

Casting properties [SubsTech] - 29 Apr 2009 ... When a large isolated region of liquid phase remains within solid, surrounding it, shrinkage cavity will form in this region. ...
www.substech.com/dokuwiki/doku.php?id... -

Our Metals | RESOURCES | Glossary | S | Shrinkage Cavity - A void left in cast metals as a result of solidification shrinkage and the progressive freezing of metal towards the center.
www.ourmetals.com/index.php?t=06... -

Casting Definitions and Terminology - Engineers Edge - Die: A metal form used as a permanent mold for die casting or for wax pattern .... Shrinkage Cavity: Void left in cast metals as a result of solidification ...
www.engineersedge.com/casting_definition.htm -

Casting (metalworking) - Wikipedia, the free encyclopedia - Solidification shrinkage occurs because metals are less dense as a liquid than .... The mold cavity of a casting does not reflect the exact dimensions of the .... The die casting process forces molten metal under high pressure into mold ...
en.wikipedia.org/wiki/Casting_(metalworking) -

FAQ About Die Casting - Glossary - Cavity – The recess or impressions in a die in which the casting is formed. ... or pores resulting from trapped gas, or shrinkage during solidification. ...
www.diecasting.org/faq/glossary.htm -

andres-larsen
Venezuela
Local time: 04:24
Native speaker of: Native in EnglishEnglish
Login to enter a peer comment (or grade)

6 hrs   confidence: Answerer confidence 4/5Answerer confidence 4/5
pull-ins


Explanation:
Also: voids, drawholes, vugs, vuggs, vughs, contraction cavities, and of course, shrinkage cavities.

Virgil Tech Eng
Mexico
Local time: 03:54
Specializes in field
Native speaker of: Spanish
PRO pts in category: 3
Login to enter a peer comment (or grade)

12 mins   confidence: Answerer confidence 2/5Answerer confidence 2/5 peer agreement (net): +1
cold shuts


Explanation:
Ich glaube, dass hier die Rede von Kaltschweißstellen ist, daher
cold shut (metallurgy)
A surface defect of a metal casting in the form of a discontinuity where two streams failed to unite. Also known as cold lap.
http://encyclopedia2.thefreedictionary.com/cold shut
Kaltschweißstelle f <qualit.mat> (Gieß- oder Schmiedefehler) cold shut; cold lap
Langenscheidt

--------------------------------------------------
Note added at 15 Min. (2010-02-16 13:28:51 GMT)
--------------------------------------------------

Cold Shut
Casting defect caused by imperfect fusing or discontinuity of molten metal coming together from opposite directions in a mold, or due to folding of the surface. It may have the appearance of a crack or seam with smooth, rounded edges. Also see Cold Lap.
http://www.sfsa.org/sfsa/glossary/deftrmcc.php

--------------------------------------------------
Note added at 21 Stunden (2010-02-17 11:03:43 GMT)
--------------------------------------------------

Hier einige Definitionen:
Kaltlauf wird durch vorzeitige Erstarrung der Schmelze heim Gießen hervorgerufen. z. B. als Folge einer zu geringen Gieß- oder Formentemperatur oder einer zu niedrigen Gießböhe bzw. Gießgeschwindigkeit.
Außerdem entstehen Kaltfließstellen (Druckguß) dadurch. dass während der Formfüllung einzelne Bereiche der Schmelze ganz oder teilweise erstarren, z. B. bei zu langsamer Formfüllung, zu langen Fließwegen oder zu dünnen Anschnitten (die während der Formfüllung teilweise einfrieren und dadurch den verfügbaren Strömungsquerschnitt verengen). Es können auch Überschichtungcn auftreten, wenn sich die bei der Formfüllung erstarrte Randschale ablöst und flüssiges Metall in den Spalt zwischen Randschale und Formwand einfließt.
http://books.google.de/books?id=_-TNRXz3XtcC&pg=PA161&lpg=PA...
cold lap. < I) Wrinkled markings on ihe surface of an ingot or casting from incipient freezing of the surface and loo low a cast-
ing temperature. (2) A flaw that results when a workpiece fails to fill the die cavity during the first forging A seam is formed as subsequent dies force metal over this gap to leave a seam on the workpiece surface. See also coldshut.
cold shut. 1) A discontinuity that appears on the sutface of cast metal as a result of two streams of liquid meeting and failing
to unite. (2) A lap on the surface of a forging or billet that was closed without fusion during deformation. (3) Freezing of the top surface of an ingot before the mold is full.
http://books.google.de/books?id=9ohkDUryVZ0C&pg=PA17&lpg=PA1...

Bernd Runge
Germany
Local time: 10:54
Native speaker of: Native in GermanGerman
PRO pts in category: 84
Grading comment
I decided for "cold lap", thanks.

Peer comments on this answer (and responses from the answerer)
agree  Gunter Prediger: from the second ref. you privided it should be rather cold lap
20 hrs
  -> Thanks Gunter - hard to tell ...
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