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Comment by hef19898 | Hacker News Reader

hef19898·

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This is least useful way to express what you're trying to say. It just says "I'm smarter than you" while adding nothing.

Which one? I can't tell cause i don't have experience.

Probably because welds are usually stronger than the materials they are binding.

As far as casting, I would imagine that would result in more brittle components that would snap instead of bend in a crash.

That depends on the metal and if it is post treated. Welded aluminum isn't as strong as the cast/extruded and heat treated pieces. Welding on 4130 steel can easily produce weaker joints if those joints are then treated. If they have an economical way to heat treat an entire cast piece, that might make it stronger than welded bits.

Heat treatment of modern, stabdardized alloys is a scirnce. Doing so with complex formed parts is still a bitch so. Especially big parts. Personally, I think induction hardening might work.

Well, welded structural parts, even produced in high vilumes, are a rather well understood problem so.

Expand on that comment, please.

This is least useful way to express what you're trying to say

The most common type of forging equipment is the hammer and anvil. Principles behind the hammer and anvil are still used today in drop-hammer equipment.

A forging press, often just called a press, is used for press forging. There are two main types: mechanical and hydraulic presses.

https://en.wikipedia.org/wiki/Forging#Equipment

Explaining, the "gigapress" is not a press, it's more of an injection moulding machine for aluminium. That's the biggest outrage.

This is the real metal press: https://youtu.be/iZ50nZU3oG8

And what Elon called a "gigapress" is also not related to more familiar semi-solid metal casting, as the alloy used has no thixotropic properties, but more regular casting under pressure.

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