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PostPosted: Sat Jan 01, 2011 8:09 pm 
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Last edited by Marek on Tue Jul 22, 2014 6:38 pm, edited 2 times in total.

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 Post subject: Re: cilinder block T35-37
PostPosted: Sat Jan 01, 2011 11:40 pm 
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Posts: 1008
Location: Netherlands, Nieuwegein
You asked about metal repairs, I posted this on my site (with photo's) in the news section on November 21, 2010 :

New repair method not involving welding!
Aranthes SA in Birsfelden Switzerland developed a new compound-sandwich technology to repair cylinder-blocks with heavy or small cracks. The technology comes from the aerospace industry.

The result is impressive and designed for a long time quality. Even difficult, almost hopeless cases with cracks in the valves area (below) etc. are now repairable.


Further information by

Aranthes SA
andrea.capra@aranthes.ch
Ahornstr. 9
CH-4127 Birsfelden
00 41 78 670 61 20

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 Post subject: Re: cilinder block T35-37
PostPosted: Sun Jan 23, 2011 3:18 pm 
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Last edited by Marek on Tue Jul 22, 2014 6:38 pm, edited 2 times in total.

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 Post subject: Re: cilinder block T35-37
PostPosted: Fri Jul 29, 2011 7:03 am 
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Last edited by Marek on Tue Jul 22, 2014 6:38 pm, edited 2 times in total.

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 Post subject: Re: cilinder block T35-37
PostPosted: Fri Jul 29, 2011 7:06 am 
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Last edited by Marek on Tue Jul 22, 2014 6:39 pm, edited 2 times in total.

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 Post subject: Re: cilinder block T35-37
PostPosted: Mon Aug 08, 2011 8:49 pm 
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Last edited by Marek on Tue Jul 22, 2014 6:39 pm, edited 2 times in total.

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 Post subject: Re: cilinder block T35-37
PostPosted: Mon Aug 08, 2011 10:16 pm 
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What are the patterns made from?
What type of iron are you casting the blocks from?

Fantastic work!


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 Post subject: Re: cilinder block T35-37
PostPosted: Tue Aug 09, 2011 5:27 am 
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Looks like a wax model. (and looks good)

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 Post subject: Re: cilinder block T35-37
PostPosted: Tue Aug 09, 2011 7:29 pm 
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Last edited by Marek on Tue Jul 22, 2014 6:39 pm, edited 1 time in total.

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 Post subject: Re: cilinder block T35-37
PostPosted: Fri Aug 12, 2011 5:50 pm 
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Hi Merick,
I am neither a metallurgist nor much of an engineer so my comments on alloys are very limited and based on general knowledge gained through reading or discussions with engineers rather than my own practical experience. I do however understand that currently there are 2 sets of common issues with some sets of blocks made in the past namely Porosity and hardness.

With porosity issue it is often only possible to see the faults in the casting once many hours of machining have been invested I would guess that the types of blow holes found in block castings often can be a result of sulphur present in cast iron which is not present in higher grades of iron and steel? (I know with steel forgings sulphur is removed at the foundry as otherwise it creates these areas of weakness in the metal cristals in a forging.)

I think linking this to the hardness issue is also important so you will want as hard a material avalable whilst it is still being possible to machine, to soft a material and whilst it machines easily it can then suffer terribly from valve recession over time.


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 Post subject: Re: cilinder block T35-37
PostPosted: Fri Aug 12, 2011 6:42 pm 
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Location: Baden-Baden Germany
one thing you do not like to have , is a hard cylinder block .
If you have hard spots or blow holes , the foundry made a mistake . And maybe the pattern is bad made or to old .
In 2011 it is not a problem to make a good block , but you have to use up to date technology .


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 Post subject: Re: cilinder block T35-37
PostPosted: Sun Aug 14, 2011 12:20 am 
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Last edited by Marek on Tue Jul 22, 2014 6:40 pm, edited 1 time in total.

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 Post subject: Re: cilinder block T35-37
PostPosted: Sun Aug 14, 2011 12:29 am 
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Location: Baden-Baden Germany
how much cost a block today , 5000 ?


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 Post subject: Re: cilinder block T35-37
PostPosted: Mon Sep 19, 2011 1:12 am 
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Last edited by Marek on Tue Jul 22, 2014 6:40 pm, edited 2 times in total.

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 Post subject: Re: cilinder block T35-37
PostPosted: Mon Sep 19, 2011 1:14 am 
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Last edited by Marek on Tue Jul 22, 2014 6:41 pm, edited 2 times in total.

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