Tek-Tips is the largest IT community on the Internet today!
Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!
-
Congratulations TugboatEng on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!
Cast iron-cast steel cyl. heads
- Thread starter dirk489
- Start date
TugboatEng
Marine/Ocean
Cracking isn't always detrimental.
As for the use of iron, it has a lot of beneficial properties with regards to machinability and wear resistance (valve guides and seats).
As for the use of iron, it has a lot of beneficial properties with regards to machinability and wear resistance (valve guides and seats).
btrueblood
Mechanical
Grey iron also has beneficial damping properties. It's also a lot easier to cast with cores, and with finer features, than steel.
enginesrus
Mechanical
I think it was a video for MTU medium size diesel engine they mentioned a cast steel block and showed using steel scrap in the mix. The reason I feel they only used cast iron is just like now, why they use a lot of aluminum for all the "junk" engines. Small lawn mower size up to the general automotive engines. Its all about the cost to manufacture, they don't give a rip if the parts crack years down the road.
Cast steel would be much easier to deal with as far as welding. It may add a bit more rejection during the casting process, again all about the costs.
Tugboat, yeah good old cracked D342 pistons, I have reused them many times, thems aluminum, and never had a problem with them.
Cast steel would be much easier to deal with as far as welding. It may add a bit more rejection during the casting process, again all about the costs.
Tugboat, yeah good old cracked D342 pistons, I have reused them many times, thems aluminum, and never had a problem with them.
TugboatEng
Marine/Ocean
In the large engine market there are fabricated steel blocks but no cast steel. The MTU 8000 engine is quite large for a cast block but still uses nodular iron. The fabricated blocks can be repaired by welding. Cast blocks are done with stitching pins.
Have a look at this video, it has a very good section on the casting of the block for a MTU 8000 series engine. (I only have experience with the 2000 and 4000 series).
Have a look at this video, it has a very good section on the casting of the block for a MTU 8000 series engine. (I only have experience with the 2000 and 4000 series).
enginesrus
Mechanical
Even not so large engines crankcase-blocks are fabricated, EMD and OP Fairbanks Morse, at least they used to be. Now?
Here is the video.
And at the 7:30 time, he calls it "steel", I doubt that is an iron casting.
Here is the video.
And at the 7:30 time, he calls it "steel", I doubt that is an iron casting.
TugboatEng
Marine/Ocean
- Thread starter
- #9
- Status
Similar threads
