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@arunmrao : thank you @EdStainless: what is your suggested thickness from last part of the model to the ground in drag?

@to all My apology. We are talking about a jaw crusher with about 8 cm thichness and several lenght like 110*90 or 60*80 or etc. And with part line in midle It is usualy cast with magnesium steel or carbon steel . We are using silica sand with resin and co2. And use chromite sand in sensetive...

Hi everyone I need to decrease the amount of sand which we used in cope and drag as much as possible. Any idea how can I calculate minimun height of needed cope and drag for a cast? ( specially for drag; in which motlten metal doesnt penetrate out of buttom of the drag)

@HBMetals : please share us chemical composition and your specimen dimension and holding time :)

@bobjustbob: Thank you so much. your opinion was really helpful.I think we should increase our time. @weldstan : my mistake! there is not normalize it should be air cool. thank you. @HBMetals : That was reaaally helpful!!! we did some like third heat treatment and I wonder why doesn't it...

@arunmrao : In this case for example for a valve of 36" which have maximum about 8 inch thickness you estimate 8 hours??!!!! do you use this for temper too?! @bobjustbob: from Y block I mean a specimen with dimension around 10*25*20 cm thank you for your explanation. they were very helpful. I...

Thank you for your answer. we surely recheck our furnace tempreature our test sample is a Y block however, maximum section size in this valve is 11 cm. first normalize was offered with some people here to maintain a finer grain size. do you just normalize after temper? Is'n that make a...

Hey everyone We have a problem about heat treatment of LCB which we fail in impact result. First I should say that I have read every single related thread in this site. We have THREE different chemical composition as : C: 0.22 Si: 0.26 Mn: 0.81 Cr: 0.16 Ni: 0.35...

Hi everyone I am working in a foundry in a tropical country. getting close to summer we have problems with our quench pools. there are 3 pools with 150 m3 volume. after three or four quenching, water temperature is getting warm and we should wait for 24 h to get temperature back to normal. We...