biella steel tips in foundry

[matteodr03]

Hello I am a mechanical engineering student and I have to make a project in which you have to make a biella through foundry processes, the biella is about 170mm long and the head hole has a diameter of 40mm. as steel I thought of using 39nicrmo3, I ask here whether it is suitable for foundry processes and if there are shortcomings to take in dimensional casting system for example or other fury appendages. thanks for the attention

 

[Chris_BRB]

Il 39NiCrMo3 è utilizzabile per i processi di fonderia e asportazione di truciolo? - CNC Italia Forum

if you can be useful

 

[matteodr03]

Il 39NiCrMo3 è utilizzabile per i processi di fonderia e asportazione di truciolo? - CNC Italia Forum

if you can be useful

Actually that is another my ahahahah account. I also asked here in the hope of receiving a more exhaustive answer

 

[meccanicamg]

39crnimo3 steel is not suitable for melting to make biella for several reasons:
* chemical composition: the presence of elements such as chromium, nickel and molybdenum, although they give the steel excellent mechanical properties, make it particularly sensitive to the formation of cracks during melting.
* Processability: 39crnimo3 steel is designed to be cold or hot, but not for melting. the melting process could compromise the final mechanical properties of the component.
* applications: This type of steel is typically used for the realization of highly stressed components that require high fatigue and wear resistance, but in processed form, not fused.

for the realization of molten biella, are generally used aluminum alloys or special cast irons, specially developed to resist the high temperatures and cyclic stresses to which these components are subject.

 

[meccanicamg]

Carbon steels and alloy c30 c45 39crnimo3 are used to give hot printed biella.

you can use grey laminated graphite cast iron as en-gjl-350 if little stressed or use spheroidal cast iron en-gjs-900-2 if conditions are particularly severe.

you can melt the 316l inox with good results.

special steels from foundry are:
- 300m (x36crmo17):r existing and tenacious, easy to drain even if it is often vacuumed
- aisi 4140: lower tied better fundable than 4340 but usually not on land
- aisi 4340: as 42crmo4 low alloy provides good mechanical resistance but some melting problem also he not on the ground to have control of the grains