Stress Relief for zinc alloy and mild steel - Diecasting process
Stress Relief for zinc alloy and mild steel - Diecasting process
(OP)
Hi,
Take a rectangular plate as an example.
Can anyone please advise me whether zinc-alloy (96% zinc + 4% aluminium) and mild steel (AISI 1020) which are made from diecasting process are require to undergo stress-relief process? Is it logical to do this?
Thanks.
Take a rectangular plate as an example.
Can anyone please advise me whether zinc-alloy (96% zinc + 4% aluminium) and mild steel (AISI 1020) which are made from diecasting process are require to undergo stress-relief process? Is it logical to do this?
Thanks.





RE: Stress Relief for zinc alloy and mild steel - Diecasting process
"Even,if you are a minority of one, truth is the truth."
Mahatma Gandhi.
RE: Stress Relief for zinc alloy and mild steel - Diecasting process
Diecasting for example, a rectangular plate. Anything wrong with the sentence?
I read it somewhere that stress relief cannot be done for zinc material.
Thanks.
RE: Stress Relief for zinc alloy and mild steel - Diecasting process
Zn alloys are in general not heat treated. There is no benefit for most applications.
I have seen thermal cycling done on parts that needed very good long term stability.
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P.E. Metallurgy, Plymouth Tube
RE: Stress Relief for zinc alloy and mild steel - Diecasting process
Nice to see you again. Thanks for the input.
Do you know what is the common practice after casting? Like you mentioned, you have seen parts that underwent thermal cycling for long term stability. But is it necessary?
Thanks.
RE: Stress Relief for zinc alloy and mild steel - Diecasting process
RE: Stress Relief for zinc alloy and mild steel - Diecasting process
RE: Stress Relief for zinc alloy and mild steel - Diecasting process
Thanks for the valuable input. I have a scenario here. A pulley bracket has broken into 2 pieces, probably due to brittle fracture (see attached). We found that this material is Zemak 3 and probably manufactured using die-casting process. As mentioned, this material will not undergo stress relieve since it does not bring any significant benefits.
Now, the material has been changed to mild steel and I believe the grade should be AISI 1020 or 1022. I have 2 questions here.
First, what is the appropriate casting process for this material? Would it be investment casting? sand casting? and why? How do one determine the casting process?
Second, stress relieve is usually done after casting. Other than cost saving, why some materials, for example, mild steel chose not to do stress relief? What is the baseline to do a stress relieve other than client's specification. Can someone enlighten me.
Thanks.
RE: Stress Relief for zinc alloy and mild steel - Diecasting process
"Even,if you are a minority of one, truth is the truth."
Mahatma Gandhi.
RE: Stress Relief for zinc alloy and mild steel - Diecasting process
Thanks.
RE: Stress Relief for zinc alloy and mild steel - Diecasting process
"Even,if you are a minority of one, truth is the truth."
Mahatma Gandhi.
RE: Stress Relief for zinc alloy and mild steel - Diecasting process
RE: Stress Relief for zinc alloy and mild steel - Diecasting process
machining would be expensive. so maybe forged to size would be a good alternative. castings are high with problems, and a high reliability issue if not process controlled properly.