What does Case depth mean?

What does Case depth mean?

Case depth is the thickness of the hardened layer on a specimen. Case hardening improves both the wear resistance and the fatigue strength of parts under dynamic and/or thermal stresses. Hardened steel parts are typically used in rotating applications where high wear resistance and strength is required.

What is case depth measurement?

Total vs. Effective Case Depth The term case depth refers to the depth of the case, or hardened layer of a piece of material. Case depth is typically measured as “total” or “effective”. The measurements can then be taken visually and measured using a calibrated eyepiece or scale to qualify the total depth.

How is case hardening depth determined?

Total and effective case depth measurement techniques Microhardness testing methods are used to determine effective case depth. A series of indentations are made on a part surface until a specified hardness is reported. Then, the distance from the surface of the part inward to that hardness level is measured.

Is standard for case depth measurement?

This standard prescribes four methods for the measurement of case depth of steels. The hardness method is the most suitable and shall be the reference method. For measuring the total case depth of carburized cases, the chemical method being the most accurate shall also be the referee method.

Is carburizing the same as case hardening?

Carburizing, also referred to as Case Hardening, is a heat treatment process that produces a surface which is resistant to wear, while maintaining toughness and strength of the core. This treatment is applied to low carbon steel parts after machining, as well as high alloy steel bearings, gears, and other components.

What is the difference between Case hardening and full hardening?

The biggest difference between surface and case hardening The biggest difference between each process is that case hardening creates a thin layer on the surface. Surface hardening hardens the outer surface and keeps the core soft throughout the entire process.

What steels can be Carburized?

The microstructure of the core won’t be altered during this low temperature processing. While carburization is used mainly for low carbon steels and low alloy steels, nitriding is used for low carbon steels, alloy steels, tool steels and stainless steels. Nitrided steels can have superior wear resistance and hardness.

What is a case carburized steel?

Can case hardened tool steel?

Case Hardening Process Many processes exist to change the properties of steel tools such tempering steel, oil quenching, precipitation hardening, and more. But when it comes to durability, case hardening (also sometimes referred to as surface hardening) is one of the most efficient.

Does carburized steel rust?

The corrosion resistance of the carburized steel is highest after tempering at 250°C for stress relief.

Which is the correct definition of case depth?

Effective case depth is the depth up to a further point for which a specified level of hardness is maintained. Total case depth is the depth to a point where there is no difference in the chemical or physical properties.

How big should a pilot hole be for a screw?

The pilot hole should be slightly smaller in diameter and as long as the screw. A piece of tape on the bit will help judge the depth of the hole. Using the pilot hole as a guide, drill a hole slightly larger than the screw shank through the top piece (B).

How is hardness calculated in a case depth test?

The hardness progression is plotted on a graph and the distance from the surface to the hardness limit (HL) is calculated. For more information, see our guide Selecting a Newage Microhardness Tester for Case Depth or contact us. By continuing to use the site, you agree to our Privacy and Cookie Policy.

How do you drill a hole for a flathead screw?

Using the pilot hole as a guide, drill a hole slightly larger than the screw shank through the top piece (B). Use a countersink to drill for countersinking oval or flathead screws (C). Insert the proper screw. Tighten the screw for a neat and strong bond of the wood.