A: complete annealing
B: homogenizing annealing
C: spheroidizing annealing
D: isothermal annealing
举一反三
- ____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
- To obtain an steel with fine pearlite we perform the commercial heat treatment known as total annealing
- ____<br/>is the isothermal heat treatment by which austenite transforms to<br/>bainite. A: Isothermal<br/>annealing B: Quenching C: Austempering D: Marquenching
- During heat treatment of steel, austenite transforms into martensite by A: annealing B: austenitizing C: quenching D: normalizing
- The brazing weld need annealing heat treatment so that it is easily machined.。（ ）
内容
- 0
To improve the machinability of low carbon steel, the heat treatment process usually used is ( ) . A: quenching B: tempering C: annealing D: normalizing
- 1
Which sequence is correct according to the procedure of PCR ?() A: denaturation → extension → annealing B: denaturation → annealing → extension C: annealing → denaturation→ extension D: Extension → annealing → denaturation
- 2
The brazing weld need annealing heat treatment so that it is easily machined. A: 正确 B: 错误
- 3
After annealing treatment, the hardness of steel ____and the plasticity ____ () A: Decreases / increases B: Increases / decreases C: Is reduced / decreases D: Raises/ is improved
- 4
In which heat treatment process, the specimen should be cooled in water or oil A: Tempering B: Annealing C: Quenching D: Case hardening