The proper preliminary heat treatment for T12 steel is . A: complete annealing B: homogenizing annealing C: spheroidizing annealing D: isothermal annealing
The proper preliminary heat treatment for T12 steel is . A: complete annealing B: homogenizing annealing C: spheroidizing annealing D: isothermal annealing
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
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
The cooling rate for normalizing is faster than that of annealing. A: 正确 B: 错误
The cooling rate for normalizing is faster than that of annealing. A: 正确 B: 错误
____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
____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. A: 正确 B: 错误
To obtain an steel with fine pearlite we perform the commercial heat treatment known as total annealing. A: 正确 B: 错误
Annealing and normalizing present a significant difference on the ductility of low carbon steels.
Annealing and normalizing present a significant difference on the ductility of low carbon steels.
The brazing weld need annealing heat treatment so that it is easily machined.。（ ）
The brazing weld need annealing heat treatment so that it is easily machined.。（ ）
中国大学MOOC: Annealing and normalizing present a significant difference on the ductility of low carbon steels.
中国大学MOOC: Annealing and normalizing present a significant difference on the ductility of low carbon steels.
Annealing and normalizing present a significant difference on the ductility of low carbon steels. A: 正确 B: 错误
Annealing and normalizing present a significant difference on the ductility of low carbon steels. A: 正确 B: 错误
To obtain an steel with fine pearlite we perform the commercial heat treatment known as total annealing
To obtain an steel with fine pearlite we perform the commercial heat treatment known as total annealing