Attached is a copy of several pages from a very old book “Welding for Engineers”, by Harry Udin, Edward Funk, and John Wulff, published by John Wiley & Sons, copyright 1954.
It provides probably the simplest discussion of why/how the coarse grained heat affected zone is harder than the surrounding material. One can certainly find more in depth and material specific discussions elsewhere but I believe the requester is looking of a very basic discussion.
Enjoy.
John A. Henning
Welding & Materials
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Shashank Vagal
Sent: Wednesday, March 20, 2013 1:27 AM
To: materials-welding@googlegroups.com
Subject: Re: [MW:17170] HAZ hardness
Gents,
Hardness is a function of chemical composition and thermal treatment. Normally HAZ hardness shall be within the range for the grade specified similar to that of basematerial. HAZ is subjected to different peak temperatures and thermal cycles, hence the Hardness of the HAZ will be higher but shall be controlled by welding conditions. Thanks & Regards J.Gerald Jayakumar From: Nasief Navsa <NNavsa@flexonics.co.za> Hi All, I’d like to ask a question along these lines as well. If one should compare the hardness of the HAZ with the hardness of the material, what would be the ideal condition of the? Regards, Nasief From: materials-welding@googlegroups.com [mailto: materials-welding@googlegroups.com ] On Behalf Of Hrushikesh Sangamnerkar Dear sir, Why is the Hardness of HAZ higher than that of Weld? Thanks and Regards, 09724738118 -- -- -- |
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