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调质型高强钢Q690采用低碳低合金化学成分设计,运用控制轧制和控制冷却技术,进行淬火后回火,使Q690钢具有比传统调质钢更低的碳当量和更小的焊接裂纹敏感性系数。
Quenched and tempered high-strength steel Q690 using low-carbon low-alloy chemical composition design, the use of controlled rolling and controlled cooling technology, quenching and tempering, so Q690 steel with lower than the traditional quenched and tempered steel carbon equivalent and smaller welding cracks Sensitivity coefficient.