Casting crack repair
Casting crack repair
(OP)
A steel casting has a large crack in it. How could this best be repaired?
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS Come Join Us!Are you an
Engineering professional? Join Eng-Tips Forums!
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail. Posting GuidelinesJobs |
|
RE: Casting crack repair
Look for a reputable repair facility that does metal stitching. I have had quite a few repairs done to both cast iron and cast steel with very good results.
Poppeye
RE: Casting crack repair
Reynolds-French did some excellent CI stitching for my company about 20 years ago on a 7,000+ HP diesel that put 2 rods (and pistons) right thru the side of the block.
RE: Casting crack repair
I know nothing about stitching although it sounds like inserting a bolt across the crack. The crack is through the thickness so stitching across the crack and down the length of the structure probably isn't possible as it's a few yards high. Secondly any additional material might intefere with other components. Can the stitch be made flush with the surface and made to act like a staple, perhaps pre-tensioned? Is welding possible even though the crack may be 100 mm deep?
RE: Casting crack repair
If there is no room for an internal or external armature, I don't think you can use the technique, unless you don't need the strength.
RE: Casting crack repair
As a last question it has been claimed that porosity within the casting has stopped crack growth. I presume that this could be imagined as the metal looking like a sponge in the region of the crack tip. Would this in fact stop the crack from growing further as they claim? I could imagine the weaker material reducing the stresses within that region but could also imagine that any imperfections would enhance crack growth, perhaps eminating from a position further from the crack.
RE: Casting crack repair
RE: Casting crack repair