SURFACE MODIFICATION TO SUIT HEAT AND NON CORROSIVE PROPERTIES FOR NON FERROUS METAL MELTING
MATERIAL DATA :
The Concept of this invention is to use a sufficiently tolerant material for withstanding corrosion at hot temperatures and Heat resistant to melt nonferrous material . There are many such material in the present day market
- Austenitic Stainless Steel special grades like SS 304,SS 310 Etc
One of the oldest material was being used for the purpose following are advantages and disadvantages
Advantages
- Very High temperature resistance
- Very high creep resistance
- Easily fabricated as it is weld able
- Cheapest source of making melting post especially Aluminum Alloy melting
MY INVENTION
I wanted to improve the working conditions in a nonferrous alloy foundry. When we go through the material data used for making melting crucibles, I understand most of the foundries are using Silicon Carbide Crucibles because the good life . In a manufacturing Industry one should focus on Maintenance free working and repeatable quality. These two are answered using Silicon carbide crucibles. The biggest problem they are facing is increase of melting time over more usage of these Crucibles. As and when the pots are being used for more number of times they pick up Iron. The hydrogen gas evolved during melting of Aluminum deposits Iron in the small pores of the silicon carbide pots and reduce the thermal conductivity of the crucible there by increase the melting time in used crucible it is called aging.
Effect
This increase the required power consumption in electrically heated melting furnace and more gas in gas fired furnaces. It consumes more time to melt the required capacity molten metal.
Discussion
After going through many of the melting practices I was looking for an alternate method to overcome this problem. Ceramic composites are the best suitable material for the properties but the constraint in manufacturing crucibles using this material
Invention
I have taken trials on small scale and achieved very good results
Advantage of the invention
- Manufacturing cost of the crucible is reduced drastically
- The life of crucible will be at least 4 time more than existing stainless steel crucible and same that of silicon carbide crucible
- The weight of the crucible will be 1/3 of Silicon carbide crucible which makes easier to handle crucible especially for a spout pouring
- Heating time will reduced drastically since the wall thickness is very less compared to silicon carbide crucible
- Economically very cheap option since the replacement cost is very much lower compared to silicon carbide crucible
- The problem of decay does not arise since there will no macro porosity as in the case of Silicon carbide crucible there by less power more melting capacity
Application of the invention
- Manufacture of crucible for melting all types of nonferrous material
- Manufacture of thermocouple jackets used in corrosive atmosphere
- Usage in some of the Automotive parts to replace stainless steel and reduce cost
- Usage in some of the air craft components for corrosion resistance and higher temperature co
- Usage in Marine parts for withstanding good saline corrosion. Especially to replace cast Iron being used which is heavier compared to coated stainless steel.
Part-2 Product Applications
- ALUMINIUM AND COPPER ALLOYS MELTING/ HOLDING POTS
- THERMOCOUPLE SHEATHING
- BAILING POTS/ LADLES
- Many more applications like high temperature upto 12000C and highly corrosive atmospheres like Acids, alkaline, Saline atmosphere (sea corrosion),etc
