Abstract: The process of smelting,rolling,solution and pickling of duplex stainless steel ER2209 wire rods for butt welding was studied. The results show that the optimum hot working temperature was 1000- 1050 ℃,which can effectively avoid the rolling cracks caused by σ phase precipitation. The heat treatment temperature was 1050- 1100 ℃,the strength of the material was low, the plasticity was high,and the cold drawing performance is excellent. The process of(H₂SO₄+HF) solution pretreatment and (HNO₃+HF)mixed pickling was used for pickling. The wire surface quality was excellent with- out pickling intercrystalline corrosion.

Key words: ER2209 Wire Rods, Duplex Stainless Steel, σ Phase Precipitation, Solution Treatment, Pickling.

摘要： 通过对焊接用双相不锈钢ER2209线材生产实践过程中的冶炼、轧制、固溶及酸洗工艺的研究，结果表明： 最佳的热加工温度为1000～1050℃,可有效避免α相析出导致的轧制开裂；热处理温度为1050~1100℃,材料的强度较低，塑性较高，冷拉拔性能优异；采用(H₂SO₄+HF)溶液预处理及(HNO₃+HF)混酸洗的工艺进行酸洗， 线材表面质量优异，无酸洗晶间腐蚀。

关键词: ER2209线材, 双相不锈钢, σ相析出, 固溶处理, 酸洗