A: annealing
B: austenitizing
C: quenching
D: normalizing
举一反三
- Quenching<br/>is the heat treatment by which austenite transforms to ____. A: bainite B: pearlite C: martensite D: ferrite
- ____<br/>is the isothermal heat treatment by which austenite transforms to<br/>bainite. A: Isothermal<br/>annealing B: Quenching C: Austempering D: Marquenching
- To improve the machinability of low carbon steel, the heat treatment process usually used is ( ) . A: quenching B: tempering C: annealing D: normalizing
- 英译汉： Carbon steel(碳钢) Martensite(马氏体) Pearlite(珠光体) Cementite(渗碳体) Ferrite(铁素体) Austenite(奥氏体) annealing(退火), normalizing(正火), quenching(淬火), and tempering(回火)
- For<br/>1080 steel, normalizing is a heat treatment obtained by austenitizing<br/>and ____ cooling. A: air B: furnace C: water D: oil
内容
- 0
In the as-quenched state, martensite is very hard and so brittle that a heat treatment known as_________must be accomplished sequently. A: normalizing B: annealing C: tempering D: austempering
- 1
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
- 2
The proper preliminary heat treatment for T12 steel is . A: complete annealing B: homogenizing annealing C: spheroidizing annealing D: isothermal annealing
- 3
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
- 4
The heat treatment process after carburization is () A: Quenching + high temperature tempering B: Quenching + medium temperature tempering C: Quenching + low temperature tempering D: normalizing