The second stage to the process is tempering which involves steadily heating the steel to a set temperature depending on what hardness you opt for and maintaining it at that temperature for around an hour. As this project was very important to me, I wanted to make sure that the hardening of...
Turning steel with a hardness of typically 55-65 HRC is defined as hard part turning and is a cost-effective alternative to grinding. Hard part turning ensures greater flexibility, shorter lead times and higher quality. Cubic boron nitride (CBN) grade is the best cutting tool material for hard...
An important measure of toughness is the resistance to fracture in the presence of a pre-existing crack. This is important because most parts in service have some level of imperfection to them. For example, a knife edge sharpened to rougher finishes will have larger scratches than a finely sha...
When it comes to knives, if I hand you a knife that is forged and say it’s better, you kind of have to take my word for it. You can’t measure the objective performance in the same way you can with accurate timekeeping, and this is how we get into these tricky myths perpetuated ...
However, flammability is not entirely reliable and, as already noted in the literature [72,73], can only measure the ability of materials to burn when directly exposed to a small flame. For this purpose, more sophisticated instruments, such as the conical oxygen consumption calorimeter, are cons...