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-   -   keris forging crack (http://www.vikingsword.com/vb/showthread.php?t=27003)

Anthony G. 27th May 2021 03:14 AM

keris forging crack
 
Hi, anyone has experience that why new keris will have forge crack?

A. G. Maisey 27th May 2021 03:57 AM

Depends on the type of crack Anthony, but common causes in forged work are material, ie, iron & steel, that is known as "hot short", in other words it does not forge easily and is subject to cracking under the hammer.

The second very common cause of a perceived crack is called a "cold shut". This occurs when the material is not at optimum temperature to achieve a weld, and/or the surfaces to be welded are insufficiently clean and/or a flux has not been used where it was necessary. A cold shut is not really a crack, but it often looks like one.

Anthony G. 27th May 2021 04:04 AM

Quote:

Originally Posted by A. G. Maisey (Post 262979)
Depends on the type of crack Anthony, but common causes in forged work are material, ie, iron & steel, that is known as "hot short", in other words it does not forge easily and is subject to cracking under the hammer.

The second very common cause of a perceived crack is called a "cold shut". This occurs when the material is not at optimum temperature to achieve a weld, and/or the surfaces to be welded are insufficiently clean and/or a flux has not been used where it was necessary. A cold shut is not really a crack, but it often looks like one.

Hi Alan, thanks for sharing.

A. G. Maisey 27th May 2021 08:33 AM

My pleasure.

David 27th May 2021 03:37 PM

Quote:

Originally Posted by Anthony G. (Post 262977)
Hi, anyone has experience that why new keris will have forge crack?

Some good photos of the crack would probably aid a discussion. ;)

JBG163 30th May 2021 02:54 PM

You can also have perpendicular cracks to the edge, that can be identify by a too hot quench of the blade.

A. G. Maisey 30th May 2021 09:39 PM

JBG, I believe that if you care to test the base cause of this type of longitudinal crack you will find that it is evidence of a cold shut, the stresses of heat treatment merely expose this cold shut.


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