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Härteangaben und Prüfverfahren

Alles über Stahl & Eisen - Gießereitechnik, Sorten, Daten, Eigenschaften etc.

Härteangaben und Prüfverfahren

Beitragvon Ruffy am Mo 13. Jan 2014, 18:47

Ich habe eine Aufgabe welche mir Kopfzerbrechen bereitet und zwar:

Sie arbeiten als Werkstoffexperte in einem Unternehmen. Ihnen wird der Prüfbericht eines Baustahls
S235 vorgelegt. Bei der Härteangabe H=220 fehlt die entspreche "Einheit".

Mit welchen Härteprüfverfahren wurde der Stahl geprüft; wie lautet die entsprechende Einheit ?
Ruffy
 
Beiträge: 1
Registriert: Mo 13. Jan 2014, 18:29

Re: Härteangaben und Prüfverfahren

Beitragvon xhoch2 am Di 14. Jan 2014, 11:26

Hallo,

Es gibt 2 Werte bzw. 2 Verfahren die für solch einen Wert in frage kommen! Zum einen gibt es das Härteprüfverfahren nach Vickers und zum anderen das Härteprüfverfahren nach Brinell. Bei Vickers wird mit einer Diamandspitze geprüft bei Brinell mit einer Kugel!http://de.wikipedia.org/wiki/H%C3%A4rte

Ich habe eben mal in meinem Tabellenbuch geguckt und dort wird die Zugfestigkeit Rm beim S235 von 290-510 N/mm^2 angegeben! In einer Vergleichstabelle findet man den Wert den du angegeben hast nicht! Also zumindest nicht für die Zugfestigkeit aus meinem Tabellenbuch! http://www.tiefbohr-lexikon.de/Buchstabe_H/Hartevergleichstabelle/hartevergleichstabelle.html oder auch http://www.saarstahl.de/haertevergleichstabelle.html.

Ich persönlich würde mich auf Vickers festlegen weil ich den Wert in den Tabellen wiederfinde! Aber dann sprechen wir nicht mehr von einem S235 sondern eher von einem S450.


Hoffe du kannst damit was anfangen

Gruß
xhoch2
 
Beiträge: 1
Registriert: Di 14. Jan 2014, 10:57


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