| 引用本文: | 于浩楠,王尊策,赵松柏,王智新,张永林.核电管道用316LN不锈钢等离子切割工艺参数优化研究[J].材料科学与工艺,2022,30(6):27-35.DOI:10.11951/j.issn.1005-0299.20220066. |
| YU Haonan,WANG Zunce,ZHAO Songbai,WANG Zhixin,ZHANG Yonglin.Process parameter optimization of plasma arc cutting of 316LN stainless steel for nuclear power pipelines[J].Materials Science and Technology,2022,30(6):27-35.DOI:10.11951/j.issn.1005-0299.20220066. |
|
| 摘要: |
| 为解决AP1000核电挤压成形厚壁管道等离子切割表面和切口成形质量差、裂纹多、后续加工量大等问题,本文搭建了大功率等离子切割试验平台,并针对20～100 mm厚核电管道用316LN不锈钢板材,采用控制变量法研究了等离子切割过程中主要工艺参数对切割质量的影响规律。研究结果表明:切割电流175～210 A,切割速度770～830 mm/min,气体压力0.56～0.64 MPa,喷嘴高度7.1～7.8 mm为20 mm厚316LN不锈钢等离子切割质量较好的工艺窗口; 在等离子切割过程中,4个主要工艺参数对切割质量的影响规律曲线均为凹型；切割电流和切割速度之间的相互匹配显著影响切割的表面质量,切割速度对后拖量影响较大,喷嘴高度对切缝宽度及切口成形影响较大。将本文实验方法及工艺参数对切割质量的影响规律应用于60～100 mm厚316LN不锈钢切割工艺参数的优化研究,获得了中厚板等离子高质量切割的工艺窗口,实验验证表明,切割表面质量和切口成形质量均有明显提升,满足后续加工工艺要求,且去除量较小,可为核电厚壁不锈钢管道的高质量切割提供工艺参考。 |
| 关键词: 等离子切割工艺 316LN 切割电流 切割速度 气体压力 喷嘴高度 |
| DOI：10.11951/j.issn.1005-0299.20220066 |
| 分类号:TG483 |
| 文献标识码:A |
| 基金项目:国家科技重大专项(04专项)资助项目(2014ZX04014051)；黑龙江省省属本科高校基本科研业务费资助项目(2019YDL-09). |
|
| Process parameter optimization of plasma arc cutting of 316LN stainless steel for nuclear power pipelines |
|
YU Haonan1,WANG Zunce1,ZHAO Songbai2,WANG Zhixin2,ZHANG Yonglin2
|
|
(1.School of Mechanical Science and Engineering, Northeast Petroleum University, Daqing 163318, China; 2.Harbin Welding Institute Limited Company, Harbin 150028, China) [HJ0.65mm]
|
| Abstract: |
| In view of the problems such as poor quality of plasma arc cutting surface and notch forming, multiple cracks, and additional subsequent processing of AP1000 nuclear power extruded thick-wall pipelines, a high-power plasma arc cutting platform was constructed to perform experiments, and the control variable method was adopted to investigate the cutting process of 316LN stainless steel plate for 20~100 mm thick nuclear power pipelines. The influence of main process parameters on cutting quality in the plasma arc cutting process was analyzed.Results show that a good process window for plasma arc cutting of 20 mm thick 316LN stainless steel was: cutting current 175~210 A, cutting speed 770~830 mm/min, gas pressure 0.56~0.64 MPa,and nozzle height 7.1~7.8 mm. The influence of four main process parameters on cutting quality was concave distribution in the plasma arc cutting process. The cooperation between cutting current and cutting speed had notable effect on quality of cutting surface. The cutting speed had great effect on the drag, and the nozzle height had great effect on notch width and notch forming. The experimental method and the influence of process parameters on plasma arc cutting quality were applied to the optimization of cutting process parameters of 60~100 mm thick 316LN stainless steel, and the process window for high-quality plasma cutting of medium-thick plate was obtained. Experiments verified that the cutting surface quality and notch forming quality were significantly improved, which could meet the requirements of subsequent processing technology, and the removal amount was small. The research provides a technical reference for high-quality cutting of thick-wall stainless steel pipes. |
| Key words: plasma arc cutting process 316LN cutting current cutting speed gas pressure nozzle height |
