×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Strength of Laser Weld before/after Heat Treatment

Strength of Laser Weld before/after Heat Treatment

Strength of Laser Weld before/after Heat Treatment

(OP)
Hi,
  I would like to know whether there is any difference in the weld strength if

a) welding without any heat treatment
b) welding after heat treatment
c) welding prior to heat treatment

and what's the reason?

Thanks & Regards.



RE: Strength of Laser Weld before/after Heat Treatment

What material are you welding?
It depends on the strengthening mechanism.

In general, (C) will give you the least variation in properties across the weld.  This is considered the 'right' way to do it, but it may not be required.
You need to know more details before you can evaluate A & B.

= = = = = = = = = = = = = = = = = = = =
Corrosion never sleeps, but it can be managed.
http://www.trenttube.com/Trent/tech_form.htm

RE: Strength of Laser Weld before/after Heat Treatment

EdStainless' answer is correct.
However it is the question that is inappropriate.
You may have the case of solution treated and aged aluminum alloys sheets (2xxx and 7xxx) that can only be resistance welded after heat treatment.
So it is also a question of process, not only of material.

http://www.welding-advisers.com/

RE: Strength of Laser Weld before/after Heat Treatment

(OP)
Hi,
  Thanks for your replies. The material that that I'm welding is SS 17-4. I believe (C) will give the strongest weld. But how about comparing (A) and (B)? Which one do you think will give a stronger weld?

Thanks & Regards.

RE: Strength of Laser Weld before/after Heat Treatment

Here is a previous thread that you generated;

thread725-110139

From my brief review of information, for 17-4PH material you could possibly need to perform post weld heat treatment, depending on your design requirements. The things you do have going with the laser is no filler metal and it is a highly localized heat input.

RE: Strength of Laser Weld before/after Heat Treatment

(OP)
What if heat treatment is carried out before welding. Is there any problem with that? Is the expected tensile strength of the weld expected to be lower than if the raw material is welded without any heat treatment?

RE: Strength of Laser Weld before/after Heat Treatment

huiying,
The web site below provides information on 17-4PH stainless steel. When you click on the web site, find the precipitation hardening stainless steels and search for 17-4PH. In most cases, it is desriable to weld in a solution heat treated condition (A) followed by

I would recommend you review this information to understand the various strength levels and heat treatment options. Your post is too open ended to provide any direction.

RE: Strength of Laser Weld before/after Heat Treatment

I hit the submit button before I was finished. Here is the web site;

http://www.aksteel.com/markets_products/stainless.asp

(there are other web sites for this material, as well).

For the best results, it is desirable to weld in Condition A and heat treat to the specified H condition.

I have used conventional welding techniques where the material was H1100 prior to welding, and after welding, we had performed a post weld heat treatment using the H1150M heat treatment.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources