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FAQ

I am doing an assignment for my materials class, im not asking for the answer but just some help. I have the assignment finished and handed in but the teacher gave it back with one comment, he asked me to explain the grain growth in steel during hydraulic press bending. Im completely stuck, please help. Thanks.

There is such a thing as critical strain which will lead to extraordinary grain growth on annealing;but not without annealing.It would be to do with the density of grain growing sources and clearly the density of these nuclei woul increase with increasing severity of strain so I just of a guess that that those parts of a pressing with least strain might grow most.But I must tell you that in the case of Aluminium alloy extrusions severe and expensive coarse grain occurs near the surface and particularly toward the back end of the bar;so this would be where most severe deformation takes place.However in a pressed steel part you have all possible circumstances,some of which on ironed walls will resemble extrusion,others would be bending strains,tensile and compressive .I have to cop out of this now because as old wasname above,said it depends.But bear in mind that it is unlikely that the material you mention would be hot pressed,further arse grain might only be a surface problem and is likely to be cured by normalising so that new ferrite grows from austenite.A similar solution does't exisat for Al alloy extrusions,it has to be machined off.In a cold steel pressig you would only expect to see a cold worked sructure because the recrystallisation temperature of pressable steel would not be less than,say 550 degrees C .

Steel coils are used in the production of steel locks as they provide the raw material required to create the lock components. The coils are processed and shaped into various lock parts such as the housing, shackle, and key mechanism, which are then assembled to form the final lock product.

Steel coils are used in the manufacturing of industrial conveyors as they provide a sturdy and reliable base for the conveyor systems. The coils are typically formed into various shapes and sizes to create the conveyor frames and supports, ensuring durability and stability throughout the conveyor's operation. Additionally, steel coils can be cut and shaped to form conveyor belts, which play a crucial role in transporting materials and products efficiently within industrial settings.

Common surface treatments for steel coils include galvanizing, which involves applying a layer of zinc to protect against corrosion; painting, where a layer of paint is applied for aesthetic purposes or to provide additional protection; and chromating, which involves applying a thin layer of chromium to enhance corrosion resistance and improve paint adhesion.

Steel coils are inspected for edge quality through visual examination, measuring thickness and width, and conducting various tests such as bend tests and surface inspections.

Is it just because brass is reloadable? But what makes it reloadable? What does brass bring to the equation that the steel cased ammo can't do?

When 9mm was short I bought some steel Tula ammo, it was cheap and available. When at the range I was shooting it and it sounded different and felt different, way less kick. So I loaded up a mix of Tula and some Federal. Big difference between them. I also had failure to eject on the steel, then put brass in and did not have that problem. I do not buy cheap steel ammo anymore.

I expect that I will be questioned about my knowledge in methoding for steel castings, in a interview. I dont know about it. Can someone explain me in simple language and give me some links, like how I can explain methoding for steel castings.....key points...help please...so that i will pass the interview as if I have experience in methoding....thanks

It is very difficult to define Methoding of Steel castings by one sentence. Actually it encompasses the total casting process. Normally it would mean a) Pattern design i.e. what type of pattern it would be- wooden, metallic, split or full, loose or fitted on a match plate or any other, how will be the parting line. b) Design of the gating system. c) Design of risering i.e. numbers, size and location of risers. d) Design of molding process i.e. sand system to be used, mold box size. But to do justice to the above mentioned activities, you need to consider other parameters of the casting process such as chemical composition, solidification characteristics, pouring temperature, pouring time, knock out time etc. As I said Methoding of Steel castings means designing of the total casting process from inception to final product.

Steel coils are used in the production of kitchen appliances as they are shaped, cut, and formed into various components such as bodies, doors, panels, and frames. These coils provide the necessary strength, durability, and stability required for the construction of kitchen appliances, ensuring the longevity and reliability of the finished products.