ICI Member Benefits


Ask the Experts: A Member Resource Q:


by Nora D’Ambra, Business Administrator T


o better service the investment casting industry, the Investment Casting Institute has developed


“Ask The Experts”. This service allows members and non-members alike to raise technical issues they are currently confronted with to the Institute’s Technical Committee. The Committee will try to post its responses(s) within 5 business days. Not only does the questioner get the answer to the question via email, but questions and responses are made available to all Institute Members in the Members-Only area. Past answered questions are


available on the “Ask The Experts” page of the Members Only area.


Previously Asked Questions Q:


We would like to improve mechanical properties of


A357/A356/C355 aluminum castings with refiners and/or modifiers. What kind of refiners/modifiers can be used? Quantities? How to use them? etc.


NEW MEMBERS


Institute Welcomes New Member


HODGE INTERNATIONAL 1278 Highway 461 Somerset, KY


42503 USA


Phone: (606) 679-8282 www.hodgegrp.com Official representative is Pete


Wooldridge, Sales Executive. The Bondtech Core leaching


and removal system, is a self- contained high pressure, high temperature capable caustic autoclave system utilized in the removal of ceramic inserts from high nickel alloy investment castings. Each system is custom designed for the application and the product processed.


®


Q: Q:


We are experiencing cracking on the edge of an A357 casting.


The defect only occurs on one of the four parts in the mold cluster. Any ideas?


I am looking for a list of vendors that can perform the


ash content test as specified in the ICI Standard Test Procedures for Pattern Materials. The ash content test is also called determination of total ash. It is the first test in the ICI document.


+1 800-756-8794 seleeac.com


August 2019 ❘ 5


We are pouring S7 and are having gas hole problems. We


have trialed low nitrogen material using an Argon blanket to no avail. Any other tricks with this material?


Q: Q: mechanical


With regard to vacuum heat treatment, does it improve properties,


especially


ductility and toughness? I know that it totally eliminates surface oxidation of castings and associated defects. I have not been able to get any information on this.


I’ve been researching properties of shell molds for a recent


project. I’m having trouble finding typical values for different physical properties and what the industry considers to be GOOD quality… Properties like: green state MOR,


Fired MOR, Hot MOR… Density, Permeability etc… Do typical values exist? Or is there


a general understanding of minimum values?


Q:


Our company shies away from 430SS as past experience


has shown that the alloy is prone to cracking. Is this especially true of this alloy? And how would one work around this problem?


Quality Products. Lasting Performance.


Our Assurance of Your Anonymity All questions are treated as company confidential information. Each ICI staff member is bound by a confidentiality agreement. Questions sent are rewritten, removing all references to the identity of the submitting company and/or individual. The question is then provided to the Technical Committee with no reference to Member name or location. The Technical Committee reviews the inquiry and returns a response to the Institute. The ICI responds directly to the submitter and posts the question and response on the “Ask the Experts” page of the website. So if you have a technical question,


check out “Ask The Experts” on our website at www.investmentcasting.org.


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