Carpenter Biodur CCM Alloy 1 and Stress Relieving Process
Carpenter Biodur CCM Alloy 1 and Stress Relieving Process
(OP)
We make a medical device from Carpenter Biodur CCM Alloy 1 .2165" barstock and it is stress relieving after machining, causing out of tolerance conditions. We are researching stress relieving this material prior to machining but we are not sure how much we can heat it up without changing the material properties. Any information provided is greatly appreciated.





RE: Carpenter Biodur CCM Alloy 1 and Stress Relieving Process
RE: Carpenter Biodur CCM Alloy 1 and Stress Relieving Process
RE: Carpenter Biodur CCM Alloy 1 and Stress Relieving Process
In your first post you say that you do stress relieve after machining. This is a heat treatment.
You really need to go near the anneal temp to get good stress relief and avoid phase changes.
The problem is that the uniformity of heating and cooling is critical to minimizing residual stresses.
You might experiment with multiple anneal cycles prior to machining.
Remember, uniform cooling.
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Plymouth Tube
RE: Carpenter Biodur CCM Alloy 1 and Stress Relieving Process
RE: Carpenter Biodur CCM Alloy 1 and Stress Relieving Process
If the arms are moving because of machining stresses then stress relief won't help.
If they are moving because of prior residual stresses then you have a chance.
Find the highest temp that does not lead to any increase in hardness.
And then be ready for long stress relief times, maybe 15 hours or more.
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Plymouth Tube