| 摘要: |
| 为了替代进口EQ347堆焊用钢带，试制生产了带极堆焊用E347L焊带。介绍了其设计思路及生产技术要点，分析了焊接工艺参数和合金元素对堆焊层成形和性能的影响。生产中采用AOD炉外精炼，热锻及热轧温度低于1 250 ℃，冷轧后产品规格0.5 mm × 50 mm，尺寸偏差可控制在±0.01 mm。进行了埋弧带极堆焊试验及检测，检测内容包括堆焊层的化学成分、力学性能和耐蚀性能等。结果表明，生产的E347L焊带堆焊层化学成分完全满足相关标准的要求，180°弯曲无裂纹， FN值在5~7之间，E347L堆焊层的硬度测试结果在 204~210 HV之间，晶间腐蚀后弯曲无裂纹产生。该不锈钢焊带已替代进口焊材并用于化工工业中的加氢反应器中。 |
| 关键词: E347L 焊带 埋弧带极堆焊 设计生产 性能 |
| DOI： |
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| Design and Fabrication of E347L Stainless Steel Surfacingstrip and Properties of SAW Deposited Metal |
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ZHANG Xin–bao
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Technology Center, Shanxi Taigang Stainless Steel Co.Ltd., Taiyuan 030003
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| Abstract: |
| E347L stainless steel strip for SAW strip surfacing was designed and fabricated in order to replace imported EQ347 stainless strip. The design method and key points of the technology were briefly presented. Also, the effects of alloy agents and welding parameters on the formation and properties of the deposited metal layer were analyzed. In the course of fabricating, AOD secondary refining was adopted; hot forging temperature and hot rolling temperature should be below 1 250 ℃.The specifications of strip after cold rolling is 0.5 mm × 50 mm, and dimensional variation can be controlled within ±0.01 mm. SAW strip surfacing test and analysis including chemical composition of the deposited metal, mechanical properties and intergranular corrosion test were carried out. The results show that the quality of the E347L strip accords with the specifications of the relevant standards. No flaw was found in bending test and intergranular corrosion test; the measured FN is between 5 and 7, and the hardness of deposited metal of E347 is between 204 and 210 HV. The stainless steel surfacingstrip has been used in hydrogenating reactor in chemical industry as a substitution for imported welding material. |
| Key words: E347L surfacingstrip SAW strip surfacing design and fabrication property |
