CQI-9 HTSA from Ford: Definition of "Normalization"

P

pog451

#1
Hi Guys and Dolls,

I have just more or less stumbled across CQI-9 HTSA from Ford. Initially I assumed it wouldnt apply to us, as we do not run any of the processes listed in the document, but in the Ford roll-out letter it adds "brazing, annealing, sintering, and normalizing".

Its the definition of this last one that causes me to think. We have heat treatment processes for the stress-relief of bent wire parts. The process does not change the structure or composition of the material in any other way. All the other CQI-9 processes have fairly radical material changing objectives.

According to http://www.engineershandbook.com/MfgMethods/stressrelieving.htm:

"stress relieving does not change the material properties as does annealing and normalizing" which would seem to support my initial assumption but I would like to be sure.

Does CQI-9 apply?



TIA

Andrew
 
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Brizilla

Quite Involved in Discussions
#2
I thought I'd answer this in order to post a related question. According to Ford stress relief on bent wire forms IS a form of Heat treat and CQI-9 applies. To say
"The process does not change the structure or composition of the material in any other way. All the other CQI-9 processes have fairly radical material changing objectives."
is a misnomer. The normalizing or stress relief changes the the stress in the component. In the case of a spring and certain wire forms this will have a drastic effect on the part, especially related to torque. It may not effect the chemical composition of the part but it does effect certain properties.

Now for my question: Does section E1.2 of Process Table E of the CQI-9 Standard apply to standard continuous flow electric ovens?

We are having a debate at work on whether this applies only to gas furnaces or any type furnace or oven used for stress relief.
 

paccnc

Starting to get Involved
#3
Brizilla,
Did you ever get an answer to your question regarding the continuous flow ovens? We are having the same debate here at our company? Any help would be greatly appreciated. I also sent you a PM.
 
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