Residual austenite is the structure that does not transform into martensite after the steel is cooled at high temperature.

1. The cooling rate is too fast, resulting in the inability of austenite to transform completely.
2. During the quenching process, the martensite that has been transformed first hinders the transformation of the untransformed austenite into martensite.

1. Improper quenching temperature
The quenching temperature has a very important influence on the structure of steel parts. Too low or too high a quenching temperature will lead to the presence of residual austenite in the quenched steel. The too-low quenching temperature will lead to the incomplete transformation of martensite, while the too-high quenching temperature will lead to the re-precipitation of austenite.
2. During the quenching process, the martensite that has been transformed first hinders the transformation of the untransformed austenite to martensite.

Answers

• 
  What are the differences in thickness and production process between medium and thick steel plates and hot rolled steel plates? 20/12/2024 16:13:18
• 
  What are the differences between PE lining and plastic coating? 04/12/2024 17:18:59
• 
  What are the acceptance criteria for hot-dip galvanized square tubes? 03/12/2024 05:26:54
• 
  How to distinguish between 304 and 201 stainless steel plates? 29/11/2024 17:07:20
• 
  Stainless steel wire rope or galvanized steel wire rope, which one is stronger? 27/11/2024 15:03:48