Boron is added to structural steel to increase its ( ).
A: tempering stability
B: toughness
C: hardenability
D: hardening capacity
A: tempering stability
B: toughness
C: hardenability
D: hardening capacity
举一反三
- The problems that ferritic steel produces during welding are ( ) and ( ). A: Grain refinement B: Intergranular corrosion C: Toughness increase D: Hardening tendency
- The problems that ferritic steel produces during welding are ( ). A: Grain refinement B: Intergranular corrosion C: Toughness increase D: Hardening tendency
- The bearing capacity of axially loaded compression member in the steel structure is generally determined by (). A: stiffness B: strength C: stability D: section
- 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
- 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