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 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
- Suppose that the United States eliminates its tariff on steel imports, permitting foreign-produced steel to enter the U.S. market. Steel prices to U.S. consumers would be expected to: A: Increase, and the foreign demand for U.S. exports would increase B: Decrease, and the foreign demand for U.S. exports would increase C: Increase, and the foreign demand for U.S. exports would decrease D: Decrease, and the foreign demand for U.S. exports would decrease