Metallographic diagram of 3Cr13 (heated at 1000~1100°C, die forged)

Metallography of Heat-Treated AISI 420 and AISI 3Cr13

The purpose of this study was to examine the metallographic characteristics of heat-treated AISI 420 and AISI 3Cr13. AISI 420 and AISI 3Cr13 are two particular types of steel used in many industries for a variety of applications, such as knife blades, surgical instruments, and production tools. The experiment was performed using scanning electron microscopy (SEM).

For the experiment, a sample of AISI 420 and AISI 3Cr13, each measuring approximately 3 cm in length, were heated to 1000-1100°C for 50minutes in a controlled environment. After heating, the hot samples were quickly quenched in water to halt the heat treatment process. Following cooling, the samples were machined using a die-casting process.

The analysis of each sample was conducted using an SEM to examine the microstructure of each sample at various magnifications. At 1,000x magnification, the microstructure of the AISI 420 and the AISI 3Cr13 samples were revealed to be composed of elongated and pa

介绍

Steel 3Cr13 is an economical martensitic stainless steel which was developed by inclusion of approximately 13% chromium and 3% nickel, and other elements such as molybdenum, silicon and sulphur. It is a low-cost stainless steel with intense hardness and has good corrosion resistance akin to that of 304 stainless steel. After heat treatment of 1000~1100℃, it can be hot formed into different shapes, such as sheets and plates.

Steel 3Cr13 has good corrosion resistance, but can still corrode in more very aggressive environments. Much of this corrosion resistance is obtained in the chromium carbide film, which forms a barrier to corrosion. Applications requiring high corrosion resistance can be improved with higher grade steels, such as 304 and 316 stainless steels. However, the cost benefits of 3Cr13 makes it an attractive option for industrial components.

Its martensitic structure and good hardenability makes it useful for a wide range of applications. In addition, its machinability is quite good, and it can be machined with standard techniques. It can be cold formed and hot formed. After heat treated of 1000~1100℃, this low cost stainless steel can be hot worked into different shapes, such as sheets and plates.

In conclusion, Steel 3Cr13 is a low-cost, martensitic stainless steel providing good corrosion resistance and excellent hardenability. It can be heat treated to various temper states, machined, and cold formed and hot formed. After heat treatment at 1000~1100℃, it hot forms easily, making it suitable for a wide range of applications needing components to be hot formed.