아공석강의 담금질(quenching) 열처리 온도로 옳은 것은?

아공석강의 담금질(quenching) 열처리 온도로 옳은 것은?
① A1 변태선 이상 30~50℃
② A2 변태선 이상 50~80℃
③ A3 변태선 이상 30~50℃
④ A4 변태선 이상 50~80℃

Results (English) 1:

Tempering (quenching), heat treatment, Abu vacancies River temperatures, right?① A1 pervert line more than 30 ~ 50 ℃② A2 pervert line over 50 ~ 80 ° c③ A3 pervert line more than 30 ~ 50 ℃④ A4 pervert line over 50 ~ 80 ° c

Results (English) 2:

Oh teaching vacancies quenching (quenching) is true to the heat treatment temperature?
① A1 transformation line more than 50 ℃ ~ 30
② A2 metamorphosis line more than 50 ~ 80 ℃
③ A3 transformation line over 50 ℃ ~ 30
④ A4 metamorphosis line more than 50 ~ 80 ℃

Results (English) 3:

the quenching. the quenching temperature (quenching) as a right to be.① bitch killed a1 30 ~ 50 degrees above normal.if the ② a2 above 50 ~ 80 degrees③ a3 30 ~ 50 degrees above normal.if the above ④ a4 50 ~ 80 degrees