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A29 4140の機械的性質はどのように調べるか?

2016-06-08View Original

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A29 4140の機械的性質はどのように調べるか? 化学成分しか見えないけど、機械的性質はどこで調べるの?
Reply #22018-01-30
A29 4140の熱処理にはどのような要求があるのか?
Reply #32018-01-30
化学成分:炭素 C:0.38~0.43、シリコン Si:0.15~0.35、マンガン Mn:0.75~1.00、硫黄 S:許容残留量≤0.040、リン P:許容残留量≤0.030、クロム Cr:0.80~1.10、ニッケル Ni:許容残留量≤0.030、銅 Cu:許容残留量≤0.030、モリブデン Mo:0.15~0.25

力学的性質:引張強さ σb (MPa):≥1080(110)、降伏強さ σs (MPa):≥930(95)、伸び率 δ5 (%):≥12、断面収縮率 ψ (%):≥45、衝撃エネルギー Akv (J):≥63、衝撃靭性値 αkv (J/cm2):≥78(8)、硬度:≤217HB

試験片の寸法:試験片の母材寸法は25mm

熱処理規格および金属組織:熱処理規格:焼入れは850℃で油冷、時効処理は560℃で水冷または油冷。 金相組織:焼戻しソルバイト。

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