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舰船用钢的研制具有周期长、技术含量高、过程复杂、不确定性多、问题需长期使用后才易暴露等特点。以用于某型潜艇的高强钢为例,从20世纪60年代开始立项研制,到最终实艇成功应用经历了长达30多年的时间,由于强度级别高,合金成分复杂,造成成材率低、焊前需预热、焊后要后热,且容易产生裂纹。期间开展了数百项的应用研究,充分考核造船的工艺性和使用性能,确保研
Ship steel with a long period of development, high technology, complex processes, many uncertainties, the problem needs to be exposed after long-term use and other characteristics. Taking the high-strength steel used for a certain type of submarine as an example, the research and development started from the 1960s to the successful application of the actual boat for more than 30 years. Due to the high strength level and the complex alloy composition, Preheat before welding, after welding to heat, and prone to crack. Hundreds of applications during the study, full assessment of craft and performance of shipbuilding, to ensure that research