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Is a "Cast Hull" better?

Дата: 30.01.2022 03:11:45
Draschel: The first mass produced method of fastening plate, and constructing hulls was riveting. And it was cheap. Even with the extra cost of material needed for bolts, washers, nuts still cheap. But the major flaws are the blocky outcomes, and rivets when struck or compressed, don't act too favorably. And even can be dangerous too inner crew, turning to be a form of fragmenting shrapnel when violently, quickly impacted. You see this with dreadnought ship design, boxy tank designs (Japanese for instance)  Casting came out, to really simply structural design with molds and vats. This simplified production, and allowed for more or less standard sizes needed getting formed. It was fast, and the skill in labor required was less needed, shortened times. But though casting can fulfill production quotas, there were issues that were quickly seen. Casting process causes, leaves behind granular imperfections. Such as specks, scabs. These need to be grinded out, if not turret jamming could result. Proper fastening may not be done also, if these specks and scabs interfered. Crew injury could result, such as cuts and lacerations on jagged imperfection not noticed.  Another big issue, was the propensity to 'split' along grain. The cast, acting very uniform and complete as monolith, once struck violently at high velocity produces tears and splits far larger than imagined would be otherwise the result from impact. Welding has advanced a long way, and produces heat treated tensile seamed metals and/or composites. It is the superior arrangement for armor protection. But it takes time, it costs more, it is labor intensive. Not only that, the training the welder needs and must have far outweighs a production operator typically needs found in manufacturing. A factory joe can produce within casting facilities. But a technologist is needed, certified for welding. But the benefits of welding remain, it cracks less, bonds and alters metal favorably, Etc.  Metal stitching is another more modern process introduced in oil assembly, manufacturing, repair industry. It is generally much akin to riveting, but doesn't typically leave outer structures and fastening visible. This method then, is slightly superior. It can be done in areas unlike molten casting and welding, where environmental / adjacent heat sources, sparks SHOULD NOT be allowed. Like areas around oil rigs where this can be dangerous, industrial gas stations, or farmer equipment repair where methane is nearby. It is also useful, for when heat stress from welding, actually weakens the types of materials and metals. Metal stitching isn't used often in military, aviation processes, so not much is known for impact stress and tensile strength, but it so far performs fine warding typical industry abrasion.   

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