由于 JIS(日本工业标准)中 SB46与SBM 钢板的含碳量比较高,在制造锅炉与压力容器的焊接过程中,必须进行高温预热以防止裂纹产生,但高温预热不仅使制作成本增高,而且造成焊接工效低、操作环境恶化。为此,日本神户制钢公司加古川厂开发研制了一种可焊性能优良的低碳 SB46、SB46M 锅炉与压力容器用钢板,在实际生产中取得了良好的成绩。 Due to the relatively high carbon content of SB46 and SBM steel plates in JIS (Japanese Industrial Standards), high temperature preheating must be performed to prevent cracks during the manufacturing process of a boiler and a pressure vessel. However, the high temperature preheating not only increases the production cost, But also caused the welding work efficiency is low, the operating environment deteriorated. To this end, Japan Kobe steel company Kakogawa plant developed a weldability of low carbon SB46, SB46M boiler and pressure vessel with steel, in the actual production has achieved good results.