brazing



brazing

Postby grumpyvette » July 29th, 2009, 3:57 pm

http://en.wikipedia.org/wiki/Brazing



Brazing is a joining process whereby a filler metal or alloy is heated to melting temperature above 450 °C (840 °F)—or, by the traditional definition in the United States, above 800 °F (427 °C)—and distributed between two or more close-fitting parts by capillary action. At its liquid temperature, the molten filler metal and flux interacts with a thin layer of the base metal, cooling to form a strong, sealed joint. By definition the melting temperature of the braze alloy is lower (sometimes substantially) than the melting temperature of the materials being joined. The brazed joint becomes a sandwich of different layers, each metallurgically linked to the adjacent layers.

Common brazements are about 1⁄3 as strong as the parent materials[citation needed] due either to the inherent lower yield strength of the braze alloy or to the low fracture toughness of inter-metallic components. To create high-strength brazes, a brazement can be annealed to homogenize the grain structure and composition (by diffusion) with that of the parent material . On the other hand, brazed joints in automotive sheet metal are considerably stronger than the surrounding native sheet steel."

brazing the oil pump pick-up tube to the pump body after carefully checking clearances will usually prevent the oil pump pick-up from vibrating loose over time

THIS LOOKS like it might be exactly what I buy at my local miller welding supply dealer for brazing/silver soldering, oil pump pick-up tubes to oil pumps, I doubt youll have any issues using it for that application,
but the last time I purchased it it was priced at $6 a stick, or just over $107 for a pack of 20 sticks
and IM fairly sure it said #15 on the package...luckily you seldom require more than about 1/2 a stick to braze an oil pump pick-up onto an oil pump



http://www.harrisproductsgroup.com/en/P ... lv-15.aspx

http://store.cyberweld.com/tubrrodsi15s ... productads

http://www.harrisproductsgroup.com/en/P ... azing.aspx

and I have used a propane torch in the past but my ox-acetolene torch works much better

HARRIS AND VICTOR are the torch brands I prefer
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viewtopic.php?f=54&t=1800&p=4597#p4597


keep in mind, most bbc pumps have 5 bolts in the cover and the pump body is where the pick-up tube installs
keep in mind, most sbc pumps have 4 bolts in the cover and the pump cover is where the pick-up tube installs
IF YOU CAN,T SMOKE THE TIRES AT WILL,FROM A 60 MPH ROLLING START YOUR ENGINE NEEDS MORE WORK!!"!
IF YOU CAN , YOU NEED BETTER TIRES AND YOUR SUSPENSION NEEDS MORE WORK!!
grumpyvette

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