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  • Users: Salvatio
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  1. Salvatio

    Heat resistant material

    Hi, currently the diesel fired burner tubes inside our furnace seem to have deformed, and looked as if it has degraded away. The tube end looks like a flower, with its edge sharpened. The material is stainless steel 310, as provided by the supplier. Is 310ss a suitable material? Could the...
  2. Salvatio

    Coil Break Defect in Cold-Rolled Steel

    Dear all, Recently we are facing several coil-break defects in our Skin Pass Mill. We were told that the discharge temperature from our Batch Anneallers is too high. However, it was maintained within below 40degC, yet we still found coil break at random coils. Uncoiling speed at SPM is already...
  3. Salvatio

    Recrystallization temperature for annealing

    Dear all, Is the a possible method to calculate the "ideal" recrystallization temperature for any steel grade? I read through some articles..a 10degC difference could bring the annealling time additional 1 hour. Recently the Product Developement team brought us some new steel grade for testing...
  4. Salvatio

    Help on microstructure identification

    Dear all, I have 3 different steel samples in which I have taken a microstructure photo of them as the link below. I was only given the specifications of the steels, but not the chemical composition. My questions is, are these steel martensitic steel (tempered), with precipitations? The...
  5. Salvatio

    bottleneck - different line capacity

    Dear all, I'm having some troubles, hope you guys could help me here. For current plant situation, each line has different capacity, with a ratio as below: line 1 - 7 line 2 - 8 line 3 - 4 line 4 - 4.4 line 5 - 6 line 6 - 4 The process is from line 1 - line 2 - line 3 - etc. However, line 2...
  6. Salvatio

    Welding spark sticks on Cu conducting clamp

    Our Pickling line uses flash butt welding machine for joining steel sheets. During welding of the steel sheets, sparks tends to stick on the clamp, which is a Cu based material, adjacent to the weld area, as this Cu clamp is to conduct electricity for welding process. Does applying some ceramic...
  7. Salvatio

    Packaging Material and Anti-Rust Oil

    Our packaging line is facing some problems, hope you guys could help out here. Our products are cold-rolled coils, which also includes pickled and oiled coils. For the current packaging, we use steel plates made from reject coils from our company, sending coils to another company to process...
  8. Salvatio

    Integrating Packaging Station

    Dear all, Currently in the packaging line that I worked in (pickling line) is facing some trouble. Some cold-rolled steel coils went missing, but were found later. Investigation shows that steel coils went missing due to ineffective information flow, where islands of information exist between...
  9. Salvatio

    cold-roll process

    Hello, does anyone know where to find easily accessible detail literature review of cold-roll process especially in pickling line in metallurgical terms? For example, how does different structure will influence the pickling time and acid concentration use? Thank you.
  10. Salvatio

    automotive corrosion

    there're quite some questions which i'd love to ask regarding to the title. Hope you guys could help me out. where could i find the best resources of these? 1. which part of a car corrode the most? i.e. the bottom corner of the door, or even around the wheel. And why does it happen? 2. what is...
  11. Salvatio

    Sorbitic Structure?

    in a recent research on heat treatment of plain carbon steel, a sample of AISI 1045 was used. After austenizing for 30mins at 1050degC, it was water quenched for 5 seconds, followed by isothermal treatment in a furnace for 3 hours at 450 degC. under tensile test, it gives a value of around...
  12. Salvatio

    Bainitic Steel, AISI 1045

    I have samples of AISI 1045 and 1050 in a 10*10*100 dimension. My question is that will it be possible obtain a fully bainitic stuctured under isothermal cooling. The Bs temperature is around 750K. Will the result be better if the specimen is to be AISI 4340? What will be the best possible means...
  13. Salvatio

    Mechanical test

    where can I find the demension and specs of ASTM of tensile and charpy test for AISI 1080 (other than ASTM.org)? Thank you.
  14. Salvatio

    Auger Electron Spectroscopy

    Does anyone knows what Auger Electron Spectroscopy is? and where could I find more information regarding this matter? Thank you.
  15. Salvatio

    Porosity and Humidity

    I notice that humidity may cause porosity to some extend. This is because it's raining quite heavily these few weeks, and scrap due to porosity has raise in quite more about 10%. Is there a study or even a genaral relationship between porosity and humidity? Pls do tell me if there are any books...
  16. Salvatio

    Scrap Metal and Market

    I would like to gather more information abuot scrap metals, such as its current market price, related standards. Other than that, does anyone knows where to find the composition of automobile parts, such as chasis, engine and etc. Any help would be grateful.
  17. Salvatio

    Porosity in Al Cast

    I would really need some help here about porosity. I've recently joined a company which manufactures brake/clutch masters for automobiles which use AL alloy and through gravity die cast. since that it is a relatively med-small type of factory, we only use fluxing and grain refinement for the...
  18. Salvatio

    Heat Treatment for AC2B

    I'm currently using grade AC2B Al alloy to cast break master and clutch master, using gravity die mould. In what way can i enhance the properties of this material..? Like in alternative HT..
  19. Salvatio

    Modification of Investment Casting

    I am currently doing a research project and trying to modify the process of investment casting. If every procedure is followed as in a normal investment casting practice, up to the mould cavity stage, instead of pouring molten metal in, will it be possible to use metal powder to firstly fill up...

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