Forums
New posts
Search forums
What's new
New posts
Latest activity
Articles
Members
Current visitors
Log in
Register
What's new
Search
Search
Search titles only
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Lab talk, the good, the bad, and the ugly
Metal
bad metal casting help
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="Dushan" data-source="post: 200893" data-attributes="member: 14608"><p><img src="https://scontent-fra3-1.xx.fbcdn.net/hphotos-xtf1/v/t34.0-12/12625747_935531709865616_17862459_n.jpg?oh=095ca6cb1c1047ba23832cabd39dd399&oe=56A90A51" alt="" class="fr-fic fr-dii fr-draggable " style="" /> <img src="https://scontent-fra3-1.xx.fbcdn.net/hphotos-xfa1/v/t35.0-12/s2048x2048/12620862_935531716532282_713683612_o.jpg?oh=361cd534b4975f134441256bc5002fa9&oe=56A84464" alt="" class="fr-fic fr-dii fr-draggable " style="" /> </p><p> first of all sory for my bad english i´m from Europe <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p><p>i started working with metal 3 years ago and never had any problem until recently .</p><p>noticed some porosity,cracks and bubbles so i changed metal .</p><p>now i´m using Kera N metal and Maruvest microfine investing material and all of my castings are ok but from time to time i noticed porosity like on picture.</p><p>problem is that i invest 2,3 bridges and other bridges are solid and perfect cast but third is like this one.so porosity is only on one place around sprue position,but the rest is also solid.</p><p>these castings are from two different cases,invested with other bridges which are perfect.</p><p>sprue used in these cases are 2,5 for wax structure,4 mm for reservoir and afterwards 3,5 mm .final temperature is 950 for about one hour,casted using a machine.</p><p>i´m well awear that metal is not class one material but the thing that bugs me is that other bridges and crown are solid and perfect and invested in same time .</p><p>so any ideas???</p></blockquote><p></p>
[QUOTE="Dushan, post: 200893, member: 14608"] [IMG]https://scontent-fra3-1.xx.fbcdn.net/hphotos-xtf1/v/t34.0-12/12625747_935531709865616_17862459_n.jpg?oh=095ca6cb1c1047ba23832cabd39dd399&oe=56A90A51[/IMG] [IMG]https://scontent-fra3-1.xx.fbcdn.net/hphotos-xfa1/v/t35.0-12/s2048x2048/12620862_935531716532282_713683612_o.jpg?oh=361cd534b4975f134441256bc5002fa9&oe=56A84464[/IMG] first of all sory for my bad english i´m from Europe :) i started working with metal 3 years ago and never had any problem until recently . noticed some porosity,cracks and bubbles so i changed metal . now i´m using Kera N metal and Maruvest microfine investing material and all of my castings are ok but from time to time i noticed porosity like on picture. problem is that i invest 2,3 bridges and other bridges are solid and perfect cast but third is like this one.so porosity is only on one place around sprue position,but the rest is also solid. these castings are from two different cases,invested with other bridges which are perfect. sprue used in these cases are 2,5 for wax structure,4 mm for reservoir and afterwards 3,5 mm .final temperature is 950 for about one hour,casted using a machine. i´m well awear that metal is not class one material but the thing that bugs me is that other bridges and crown are solid and perfect and invested in same time . so any ideas??? [/QUOTE]
Insert quotes…
Verification
Who do we work for?
Post reply
Forums
Lab talk, the good, the bad, and the ugly
Metal
bad metal casting help
Top
Bottom