本文还提出了K_（ISCC）的上下限原理，据此原理，对某些低强高韧性钢可以用超载法确定K_（ISCC）的范围值。

A principle of upper and lower bound for KISCC was also presented, by this principle a range value of KISCC for some low-strength and high-toughness steels can be determined…

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指出厚规格高韧性管线钢的生产难点在于热连轧。

Difficulties in manufacturing heavy gauge pipeline steel with high toughness lie in the process of hot tandem rolling.

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论述了超细晶粒钢的超细晶粒及高强度与高韧性良好匹配的特点。

With the features of ultrafine grain, fair matching of high strength and high toughness in the ultrafine grain steel.

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