A.760
B.845
C.600
D.925

A.平炉
B.转炉和大型平炉
C.电炉
D.什么炉型均可

A.S≤0.055%P≤0.055%
B.S≤0.045%P≤0.045%
C.S≤0.055%P≤0.045%
D.S≤0.55%P≤0.45%

A.0.25~0.80
B.0.25~0.60
C.0.30~0.65
D.0.35~0.70

A.0.25~0.80
B.0.10~0.50
C.0.15~0.65
D.0.20~0.70

A.热裂
B.开裂
C.热脆
D.裂纹

A.硅
B.铬
C.锰
D.镍

A.2.11%
B.2.12%
C.0.211%
D.0.212%

A.奥氏体
B.渗碳体
C.珠光体
D.莱氏体

A.600~800
B.800~1000
C.1000~1200
D.1200~1400

A.随钢种和冷却方法而变
B.使表面处于受压状态
C.使表面受拉应力
D.使表面处于受拉状态