Ethnographic Arms & Armour
 

Go Back   Ethnographic Arms & Armour > Discussion Forums > Keris Warung Kopi

Reply
 
Thread Tools Search this Thread Display Modes
Old 27th May 2021, 03:14 AM   #1
Anthony G.
Member
 
Join Date: Mar 2018
Posts: 270
Default keris forging crack

Hi, anyone has experience that why new keris will have forge crack?
Anthony G. is offline   Reply With Quote
Old 27th May 2021, 03:57 AM   #2
A. G. Maisey
Member
 
Join Date: May 2006
Posts: 5,804
Default

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.
A. G. Maisey is offline   Reply With Quote
Old 27th May 2021, 04:04 AM   #3
Anthony G.
Member
 
Join Date: Mar 2018
Posts: 270
Default

Quote:
Originally Posted by A. G. Maisey View Post
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.
Anthony G. is offline   Reply With Quote
Old 27th May 2021, 08:33 AM   #4
A. G. Maisey
Member
 
Join Date: May 2006
Posts: 5,804
Default

My pleasure.
A. G. Maisey is offline   Reply With Quote
Old 27th May 2021, 03:37 PM   #5
David
Keris forum moderator
 
David's Avatar
 
Join Date: Aug 2006
Location: Nova Scotia
Posts: 6,320
Default

Quote:
Originally Posted by Anthony G. View Post
Hi, anyone has experience that why new keris will have forge crack?
Some good photos of the crack would probably aid a discussion.
David is offline   Reply With Quote
Old 30th May 2021, 02:54 PM   #6
JBG163
Member
 
Join Date: Sep 2019
Location: France
Posts: 84
Default

You can also have perpendicular cracks to the edge, that can be identify by a too hot quench of the blade.
JBG163 is offline   Reply With Quote
Old 30th May 2021, 09:39 PM   #7
A. G. Maisey
Member
 
Join Date: May 2006
Posts: 5,804
Default

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.
A. G. Maisey is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +1. The time now is 09:41 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
Posts are regarded as being copyrighted by their authors and the act of posting material is deemed to be a granting of an irrevocable nonexclusive license for display here.