A: Tempering
B: Annealing
C: Quenching
D: Case hardening
举一反三
- To improve the machinability of low carbon steel, the heat treatment process usually used is ( ) . A: quenching B: tempering C: annealing 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 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
- 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
- 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
内容
- 0
____<br/>is the isothermal heat treatment by which austenite transforms to<br/>bainite. A: Isothermal<br/>annealing B: Quenching C: Austempering D: Marquenching
- 1
During heat treatment of steel, austenite transforms into martensite by A: annealing B: austenitizing C: quenching D: normalizing
- 2
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
- 3
Quenching<br/>is the heat treatment by which austenite transforms to ____. A: bainite B: pearlite C: martensite D: ferrite
- 4
____is<br/>a low-temperature heat treatment used to eliminate all or part of the<br/>effect of cold working in steels. A: Normalizing B: Spheroidizing C: Annealing D: Process<br/>annealing