To obtain the best results when working with the tool steel AISI O2 1.2842, 90 MN Cr V8 designation, several factors must be considered. The best standards for working with the steel in have been proposed in the ISO 4957 specifications.
Adhering to the recommended standards will give excellent results, because the tool steel that has been formed will not be prone to degradation and abrasion when subjected to intense heat energy.
Another benefit of creating AISI O2 tool steel according to the acceptable standards is that the dimensional changes that may occur will be regular, and the tool steel will exhibit a high level of durability.
To further break down the analysis for the best tool steel AISI O2, the following is an adequate representation of the chemical composition for the required steel grade – 1.2842, 90 MN Cr V8.
Regarding the mechanical properties of 1.2842, 90 MN Cr V8 AISI O2 steel designation, several parameters should be considered.
For example, we need to assess the Linear expansion coefficient, which is 11, 7 * 10-6 K-1, and the thermal conductivity of the steel, in this case, it is stated as 25 W*m*K.
Also, on average, the hardness in softening annealed condition is stated as <229HB, and the hardness after the hardening process is completed is >61 HRC.
The hardness level after hardening and tempering varies at different temperatures, with the minimum stated as 200C = >61.0 HRC, and at a maximum temperature of 550C, it is equal to 44.0 HRC.
A Look at the Heat Treatment Process for Tool Steel AISI O2
The heat treatment process required to get tool steel AISI O2 of an acceptable grade has been described below.
In theory, the conditions stated below may not depict the intensity of the process. However, the temperatures stated in the text are an accurate representation of the conditions that must be created to get the best tool steel.
The condition that must be created for softening annealing to occur is at a temperature range that falls between 680 to 700 degrees.
Slow Cooling Relief
To complete a slow cooling relief, the heat energy supplied must fall between 600 and 680 degrees. After this is done, the tool steel is placed in oil for hardening.
The hardening process in oil is done at a temperature of 780 to 800 degrees.
Tempering in Air
This is the final stage in the process of forming the tool steel. It is done under specific temperature conditions that fall within the range of 200 to 280 degrees.
Products That Can Be Made From Tool Steel
A wide range of products can be forged from steel. At the top of the list, we have precision tools.
Precision tools are improved work equipment that is used to ensure quality assurance and accuracy during project execution. High-range precision tools are made from the tool steel for cold work AISI O2.
Other products made from AISI O2 tool steel include moulds used in extrusion factories, micrometre screws, spindles, cutting plates, cutting blades, disk knives, punching dies, draughts, measuring plates, and hand reamers.