It's not just you. I have same K4770 processor and it's doing the same thing. It went up to 100 degrees Celsius. I was monitoring heat. I stopped render and it went back to nominal temperature of 35-45 degrees Celsius. During the render, my processor load was 100%, so I decided to check if V-Ray uses 100% too because that was never a issue with V-Ray renders. When I rendered test scene cpu load was 100% too, but it didn't go over 80 degrees. And it was stable. I hope there will be solution to this, because I would love to use this render engine.
This was already asked by more people before, but that's not how software works. Software cannot stress your hardware above the thermal design. Corona (or any software at all) isn't the reason why your CPU is overheating. Just because other software shows similar loads, doesn't mean they have the same stress load, some instruction sets are more demanding (like SSE, AVX ).
If you CPU routinely goes above 80 C, you simply have bad cooling, it is simple as that. If you have good CPU cooler, check if the thermal paste is applied correctly. For 1151 CPUs, a de-liding process is option. Make sure you have good airflow inside case.
If you're running overclock, make sure you stay within reasonable voltage, depends on your pure luck. If you need to run high voltages to get high over-clock, you lost in silicon lottery and simply can't afford to run such overclock.
