贝氏体的微观结构由______和______组成。 A: ferrite and cementite B: austenite and ferrite C: austenite and cementite D: ferrite and pearlite
贝氏体的微观结构由______和______组成。 A: ferrite and cementite B: austenite and ferrite C: austenite and cementite D: ferrite and pearlite
δ-ferrite is stable only at relatively high temperatures.
δ-ferrite is stable only at relatively high temperatures.
The key transition described in this diagram is the of single-phase austenite (γ) to the two-phase ferrite plus carbide structure as temperature drops.
The key transition described in this diagram is the of single-phase austenite (γ) to the two-phase ferrite plus carbide structure as temperature drops.
Quenching<br/>is the heat treatment by which austenite transforms to ____. A: bainite B: pearlite C: martensite D: ferrite
Quenching<br/>is the heat treatment by which austenite transforms to ____. A: bainite B: pearlite C: martensite D: ferrite
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)
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)
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