In following temperatures ( ) is not in the range of high, medium and low temperature tempering temperatures of steel.
A: 200℃
B: 350℃
C: 400℃
D: 500℃
A: 200℃
B: 350℃
C: 400℃
D: 500℃
举一反三
- For tool steel, the heat treatment is usually: () A: spheroidizing followed by quenching and low temperature tempering B: carburizing followed by quenching and low temperature tempering C: Quenching and high temperature tempering D: normalizing
- The heat treatment process after carburization is () A: Quenching + high temperature tempering B: Quenching + medium temperature tempering C: Quenching + low temperature tempering D: normalizing
- The common heat treatment on steels such as 65Mn and 60Si2Mn is . A: quenching + low temperature tempering B: quenching + medium temperature tempering C: quenching + high temperature tempering D: normalizing
- The heat treatment of spring steel is treated by ( ). A: quenching and low tempering B: quenching and tempering C: quenching and middle tempering D: quenching and high tempering
- Pesticides must be burned at very high temperature because high temperatures can limit ______.