Auto-tempering occurs after welding when （ ）.
A: carbon content of weld is low
B: cooling rate is slow
C: peak temperature is high
D: Ms is high
A: carbon content of weld is low
B: cooling rate is slow
C: peak temperature is high
D: Ms is high
举一反三
- The heat treatment process after carburization is () A: Quenching + high temperature tempering B: Quenching + medium temperature tempering C: Quenching + low temperature tempering D: normalizing
- 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 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 aphotic zone (bottom of the ocean) will have ____ and ____ while the photic zone (surface of the ocean) will have ____ and ____. A: low temperature, low salinity; high temperature, high salinity B: low temperature, high salinity; high temperature, low salinity C: high temperature, high salinity; low temperature, low salinity D: high temperature, low salinity; low temperature, high salinity E: both have equal temperature and salinity
- Limit pricing requires the monopolist to maintain a low price before entry occurs ( ). A: high, after B: high, before C: low, before D: low, after