What is the effect of surface contamination on a casting of Inconel 718?
157272
It very well may be surface only discoloration...buff an area and see.Just because it blued a little is no reason to think it is contaminated deeper. The blueing is oxadation due to the heat.
1122012
Hmmm... I've never heard that term either.  Is that some sort of microbe that can contribute to the newer problem of Microbiologically Influenced Corrosion?\n\nAre you sure you spelled it correctly?
88374
Plaster mold casting may work.\n\n"In plaster mold casting, a plaster, usually gypsum or calcium sulfate, is mixed with talc, sand, asbestos, and sodium silicate and water to form a slurry. This slurry is sprayed on the polished surfaces of the pattern halves (usually brass). The slurry sets in less than 15 minutes to form the mold. The mold halves are extracted carefully from the pattern, and then dried in an oven.\n\n"The mold halves are carefully assembled, along with the cores. The molten metal is poured in the molds. After the metals cools down, the plaster is broken and the cores washed out."\n\nI don't know what finished product you plan to make. You say you want to duplicate a glass bottle, but does that mean you want to do it in glass, or will you do it in plastic or some other material? I don't know if this process would stand the temperature of molten glass. In that case you would be better off with what is called "refractory mold material." Both the plaster and the refractory material should be available from a Dental Laboratory supplier.\n\n"Low temperature melting materials such as aluminum, copper, magnesium and zinc can be cast using this process. This process is used to make quick prototype parts as well as limited production parts. "
561416
Preheating is not necessary unless there is a risk of porosity from moisture condensation.\n\nNo pre-heat is required on inconel® or stainless products.
217585
nothing before use but after u need to clean it and flush the motor with fresh water to prevent corrosion
795577
Archive News Story\n(Products mentioned in this Archive News Story may or may not be available from the manufacturer.)\n\n\nFiltration System removes contaminants in hydraulic oil.\n\nJune 11, 2003 - Portable Hydraulic Oil Filtration System connects to injection molding machine oil reservoir through 2 lines and can be equipped with quick connect/disconnect fittings. Flow rates range from 3–24 gpm and filter through 3 filtration stages. Using cycle of passes through system, 98% of all contaminants are removed, extending hydraulic oil life 8–10 times or more.\nSend emailContact company\nCompany Profile at ThomasNet.com\ncompany web siteCompany web site\nmore company newsMore news from this company\nweb search for more informationSearch the industrial web for: "hydraulic oil heating in drum"\ndirectory searchSearch for suppliers of:\nFiltration Systems: Industrial Oil\n\nAdvertisement\n\nArchive Press Release\n(Products mentioned in this Archive Press Release may or may not be available from the manufacturer.)\n\n\nRelease date: June 6, 2003\n\nThe Leading Preventable Cause of Injection Molding Machine Breakdown is Hydraulic System Malfunction\n\nWithout proper maintenance, your hydraulic systems components life span may be reduced by up to 75%. This leads not only to costly equipment repair, but to expensive down time as well. Combine that with new, stricter environmental regulations concerning the disposal of waste oil, and you have a potential operating capital drain. With the application being Hydraulic oil, the primary degrader of oil, HEAT, is not a factor. Water and dirt particles are the enemies of the hydraulic oil.\n\nOur engineered process removes these contaminants¹ quickly and efficiently. Our portable systems will connect to the injection molding machine oil reservoir through two 1² lines. The units can be equipped with quick connect/disconnect fittings. The flow rates range from 3 ­ 24 GPM and filter through three filtration stages. Using a cycle of passes through the system, 98 percent of all contaminants are removed from the hydraulic oil. This simple service can extend your hydraulic oil life 8 ­ 10 times or more.\n\nThe Glanon Hydraulic Oil Filtration System is shipped from the factory equipped and ready for immediate service. Portable and easily maneuverable, this system can service multiple Injection Molding Machines in a single day.\n\nAn Injection Molding Machine can easily be serviced without manually draining and refilling the oil. Hydraulic system maintenance hours will be reduced, oil life will be increased, and environmental impact will be minimized.
874237
R&D Projects\nAdvanced Computations\n\n \n\nAlloy Selection System for Elevated Temperatures (ASSET)\n \nMany aspects of equipment design and operation as well as alloy selection and design are influenced by the expected lifetimes of equipment in high-temperature, corrosive gases.  Currently, many processes are limited by the inability to predict corrosion rates for equipment used in high-temperature processes. A new database is being developed to enhance the ability of the chemical industry to predict corrosion of commercial alloys.  Benefits in improving the ability to manage corrosion data for alloys in high temperature, corrosive gases will be far reaching in the chemical industry.   Better characterization of alloys under operating conditions will result in reduced energy use and maintenance, increased process safety, cost-effective use of expensive alloys in equipment designs, and improved productivity.   \n\nASSET will be an alloy selection and corrosion prediction system that includes a database linked to thermomechanical calculation programs.  The linked programs will use experimentally measured corrosion data obtained under well-controlled conditions to predict the corrosion rates for commercial alloys.   This project will include data on an extensive list of alloys exposed to a wide range of complex and corrosion gases for temperatures of 250 to 1,150oC.  The considerations being used to generate the corrosion data include oxidation, sulfidation, sulfidation/oxygenation and carburization.  The approach to this project includes improving and expanding the ASSET system and training participating companies in its use.
781768
I think this may help you:\nhttp://www.counteractrust.com/types%20of%20corrosion.htm\n\nor this:\nhttp://www.eaa1000.av.org/technicl/corrosion/types.htm\n\nThere are a great many "types of corrosion" but generally for any given application there will be only a few types that are relevant.
748213
Try Edmund Scientific on the web..but if you want to make your own try the link provided.\n\nGood luck!
981890
Reproduction detail\n1. use of finer sand, \n2. Hydrostatics of the molten metal \n3. same as in #2\n4.Hmmm?\n5.To avoid air voids :). \n6. Not enough water and the sand will crumble, too much water the medium will be too fluid or too much of steam will be produced during casting damaging the mold from inside out.
1041375
Here are some sources\n\nwww.elephant-dental.de/downloads/ BR_E_Biocompatible%20Alloys.pdf\n\nwww.devicelink.com/emdm/archive/06/05/019.html\n\nwww.dentricks.se/prod01.html
1032103
YOU ARE RIGHT. THE SURFACE OF THE PARTICLE OR OBJECT HAS TO BE UNEVEN OR ROUGH SURFACE
749469
Drop forged is stronger... casting could contain impurties which may cause it to crack. Stationary parts are ok as cast (e.g. engine blocks) but moving parts and impact tools are better when made from forged steel. You probably noticed that drop forged tools tend to cost more -- that's why.\n\nIf you buy your tools from Snap-On or Craftsman (Sears) you'll get lifetime replacement.
350595
C whether this helps You,\nhttp://web.umr.edu/~kpeaslee/classes/Met221/KeyHW2.pdf#search='measuring%20SDAS%20in%20Aluminum%20alloy%20casting'\n\nhttp://www.aluplanet.com/eng/info_eco_doc_PO.asp?Mnu=141&Itm=163&Grp=0&Tgl=162&Doc=3804
1045611
Infection is always a risk. I've had mine done for years and have never had a prob. Go to a clean reputable place and ask if they disinfect their tools. (I know you don't want to seem like a snob asking this, but your health is more important)
683292
Thermal Shock Happens\nhttp://www.ceramicindustry.com/CDA/Archives/bea0949fcc9c7010VgnVCM100000f932a8c0____\n\n"The heatup and cooldown of a refractory lining should both be controlled, because damage can be induced in either case. A heating/cooling rate of less than 100°F/hour is commonly recommended."
412852
Your crucible is leaking in oxygen, and the oxide content is building up in your metal