stabilize dimensionally for aging

[ansyolitico]

Hi.
I recently spoke with two designers of the technical office

both told me that to stabilize cast iron bases from fusions, they left them "age" for a year outside

I think how treatment is hardening by precipitation

Has anyone heard of it? Something more about it?

can you obtain the same results with a cryogenic treatment or distension?

 

[wert]

in my first experience I worked in a company that designed and produced grinding machines, whose bases and other important parts were made of meehanite cast iron. I speak of the early 1980s and there were no programming techniques of current production (lean), so we could afford to order them in advance and leave all the bases out for at least 6/8 months before they were processed. thermal treatment that overrides natural aging should be distension, which is not a treatment that gives an improvement of mechanical characteristics but prevents internal tensions from deforming artefacts at a distance of time. In grinding machines you can imagine what importance it assumes dimensional stability.

 

[TETRASTORE]

to have more information about the aging of cast iron you can consult these documents:
- age strengthening of cast iron: alloying effects and kinetics study (scientific study on the effects of aging in composition and mechanical characteristics)
- effect of ageing on machining performance of grey cast iron and its compensation by cutting speed management (study of the influence of aging on workability).

 

[ragnol]

an acquaintance worked his whole life in a company that produced lathes and friezes, and he also told me that the crude fusions left them practically a year to stabilize.

partial ot: it has also explained to me that in the last years pre-pension the times of "stagionatura" have gone shortening to have less dormant warehouse (with the risk of not having orders), until the crudes have begun to arrive by ship, embellished by discreet blows. but it's not the first time you hear it's what...