Vibranium can also cut the Hulk due to the same reasoning as Adamantium -- they are two of the strongest metals in the world. The one thing to note is that when Hulk gets angrier, his skin becomes more durable and can then withstand even these metals.
Swords, knives, and more have been used against Hulk and almost none of them even leave a scratch or mark on him. However, with that said, there are two bladed weapons that can cut into Hulk's skin.
Vibranium seems to have a better chance of holding back the Hulk, although that has not been definitely confirmed. When the Avengers confronted Banner in Immortal Hulk #7, Captain America's shield didn't stand a chance, despite being a Vibranium-Adamantium alloy.
Bruce Banner discovered that during a previous Chitauri attack, the Hulk had been able to smash through the Vibranium plated Chitauri ships without any effort. Because of this, he discovered that Vibranium turns brittle when exposed to gamma radiation.
Finally, after Logan tells him bones are coated with the metal, Hulk promises to strip it off his skin - but never successfully damages Wolverine's adamantium bones. Hulk has broken adamantium objects, armors, and weapons in the past.
In Age of Ultron, concentrated energy blasts of sufficient heat and power are also shown to be effective against Vibranium. Thor's lightning, Vision's Mind Stone lasers and Iron Man's repulsor beams were able to melt Ultron's body when used in combination, meaning that high enough temperatures can break Vibranium down.
His adamantium claws are one of the few weapons in the Marvel Universe that can consistently pierce Hulk's skin and Wolverine has no problem going for Hulk's head. In fact, if it came down to it, Wolverine could cut Hulk's head off, ending the Hulk once and for all.
Because of the thickness and strength of the Hulk's skin, it's nearly impossible for any form of artillery to hurt him. Sure, everyone's seen bullets bounce off of the Hulk, but when we say he's bulletproof what we really mean is he's BULLETPROOF.
As seen in certain comics from Marvel such as Black Panther #48, vibranium in its purest form does not respond to Magneto, resisting his powers a rare exception.
Despite his immense power, the Hulk has been defeated by heroes like Wolverine, Iron Man, Puck, and the Punisher. Spider-Man, Fantastic Four, and the Thing have also managed to take down the Hulk using their intelligence, teamwork, and unique abilities.
[MARVEL] What would've happen if Wolverine had vibranium in his bones instead of adamantium? First of all, he'd be a lot lighter, which of course means he'd be faster, quieter, and more agile. Other than that, I don't think you'd notice a significant difference.
There's no question the Hulk is a near-indestructible force who comes out on top in almost all of his battles of pure strength. However, against Superman, he's outmatched. While Hulk's strength might rival that of the Man of Steel, Superman's other abilities give him a considerable edge against his opponent.
Deadpool is easily one of the most powerful characters Marvel has. The fast-talking gunman seems almost fearless on the battlefield, but in reality, there's a lot that scares the Merc with the Mouth. There are two things though, that scare him above all: cows and clowns are a Deadpool weakness.
As you know, Bruce is a pretty thin guy, so we assume his junk is pretty standard — but The Hulk's junk is going to be massive. This is going to make sex a real gamble because you might end up with a 20-inch-long and 7-inch-wide veiny rod of tissue in one of two orifices . . . neither of which is going to pleasant.
I'm going to max power!" before using a concussive blast so powerful it begins to strip the skin from Hulk's body. It isn't quite enough to stop him, but that impact puts Cyclops in a small group of people able to damage Hulk in his strongest form.
So while Juggernaut is much more powerful, and would normally be able to win in a fight, Colossus could convince Cyttorak to transfer his power, or even cut off Cain Marko's connection to Cyttorak. Cain Marko would be left as a normal human. Colossus would still be a powerful mutant.
In that limited series (titled Ultimate Wolverine vs Hulk), the Hulk rips Wolverine in half. While epically gruesome, this scene caused some discord within the fandom, since many fans argued that Wolverine's adamantium skeleton should have prevented that from happening.
Although vibranium is susceptible to damage, it's depicted as the most durable material in the Marvel Cinematic Universe. The fact that Thanos possesses enough power to beak vibranium is a testament to the strength of the Mad Titan, but more importantly, the weapon itself.
Originally Answered: Would iron man be a lot stronger if he could make his suits with vibranium? Yes, most certainly. And thats true of any better substance or metal, he would be quite better off due to its power and protection.
Throughout Marvel Comics, the Hulk has tried and failed to break Captain America's shield but has never even come close, and since Superman is only a little bit stronger than the Hulk in his base form, it makes sense that Superman wouldn't be able to break the shield either.
