2019年2月12日 · Hardness is the measure of a material resistance to scratching, like it's hard to drill a hole into, or hard to sand. Or diamond that can cut many surfaces but is hard to cut. Toughness is the ability of material to resist cracking or breaking under stress. Strength is the ability of material to withstand great tension or compression or other ...

2020年9月9日 · The basic method for hardness measurement is using an indender and a standard force on a material surface and then measuring either the depth or the area of the imprint. However, is happening with almost all hardness scales is that you cannot obtain meaningful results for all types of materials, for a given force and a specific indender.

2020年1月14日 · Are you are using the outer race as a "wheel". Sounds like an unusual design , maybe a steel tire should be put over the outer race. The steel tire could easily be any hardness you want. It would be poor judgement to mess with the rolling element bearing hardness. The heat-treatment has been developed over decades.

The second consideration is the tempering temperature. This only applies to steels which have been heat treated, generally cutting tools, dies, springs and certain other very high strength/hardness parts. The tempering range can vary between 180 and 300 C or up to 600C for high speed steels.

2021年12月30日 · "Hardness" - Hardness (antonym: softness) is a measure of the resistance to localized plastic deformation induced by either mechanical indentation or abrasion. In general, different materials differ in their hardness. Its usage is limited to the cases stated above.

2022年12月13日 · How do I plot the relation between hardness of a material and compressive strain knowing the stress-strain curve and indentation size in Brinell's hardness test Skip to main content Stack Exchange Network

Hardness, as indicated by @kamran, will generally be impacted by compressive surface finishing techniques applied, making it harder in the process. Stated in @kamran's answer as well, roughening will increase hardness since most roughening methods generally apply some compressive force to steel surfaces.

2022年4月6日 · "Hardness is the question of how difficult it is to make an impression/indention on a substance. Brittleness is the question of how easy it is to break. For example, Granite is a stone which is very hard but not brittle--it is hard to carve and also hard to break. A plank of wood is not as hard as stone but is not very brittle.

2022年2月22日 · Given similar strength and hardness spec, materials that work-harden can be much worse to work with. If milling or drilling, some materials form nasty chips compared to others. Some have a wear-resistant microstructure (grains of carbides or silicons) and hence eat up the cutting tool faster than others...

In steel hardness is closely related to tensile strength so a hardened steel will have both high hardness and high tensile strength. Toughness is a bit more difficult to quantify than strength but in general is the ability to resist impact and resistance to brittle fractures.