Gents,
HAZ is inherently made of coarse grained structure wrt the rest of the areas - meaning more brittle and hard. Hence more hardness there, But if a PQR is OK, this excess hardness automatically falls in acceptable category. As regards heat input and HAZ hardness, if you keep close to the higher HI range value, you will end with a lower HAZ hardness due to relatively slower cooling.
SV
--- On Tue, 19/3/13, james gerald <gerry_tup@yahoo.com> wrote:
From: james gerald <gerry_tup@yahoo.com>
Subject: Re: [MW:17156] HAZ hardness
To: "materials-welding@googlegroups.com" <materials-welding@googlegroups.com>
Date: Tuesday, 19 March, 2013, 1:07 PM
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 0091-9344954677 From: Nasief Navsa <NNavsa@flexonics.co.za>
To: "materials-welding@googlegroups.com" <materials-welding@googlegroups.com>
Sent: Tuesday, March 19, 2013 11:31 AM
Subject: RE: [MW:17153] HAZ hardness
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
Sent: 18 March 2013 04:51 PM
To: materials-welding@googlegroups.com
Subject: [MW:17145] HAZ hardness
Why is the Hardness of HAZ higher than that of Weld? Thanks and Regards,
Hrushikesh H Sangamnerkar --
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