1.北京科技大学材料科学与工程学院,北京 100083
2.江苏武进不锈股份有限公司,常州 213111
3.湖州永兴特种不锈钢有限公司,湖州 313099
梁凯(1998—),男,硕士; E-mail:liangkai593@163.com
姚志浩(1982—),男,博士,教授; E-mail:zhihaoyao@ustb.edu.cn
收稿:2024-12-03,
修回:2025-01-20,
录用:2025-01-24,
纸质出版:2025-07-30
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梁凯,姚志浩,谢锡善等.新型耐热合金SP2215无缝管二辊斜轧穿孔的数值模拟[J].特殊钢,2025,46(04):107-121.
Liang Kai,Yao Zhihao,Xie Xishan,et al.Numerical Simulation of Two-roller Rotary Rolling Piercing of a New Heat-resistant Alloy SP2215 Seamless Pipe[J].Special Steel,2025,46(04):107-121.
梁凯,姚志浩,谢锡善等.新型耐热合金SP2215无缝管二辊斜轧穿孔的数值模拟[J].特殊钢,2025,46(04):107-121. DOI: 10.20057/j.1003-8620.2024-00272.
Liang Kai,Yao Zhihao,Xie Xishan,et al.Numerical Simulation of Two-roller Rotary Rolling Piercing of a New Heat-resistant Alloy SP2215 Seamless Pipe[J].Special Steel,2025,46(04):107-121. DOI: 10.20057/j.1003-8620.2024-00272.
奥氏体耐热合金在斜轧穿孔过程中工艺参数的选择不当,可能导致毛管出现晶粒粗大、混晶等现象,甚至在加工过程中发生断裂,进而影响到后续的加工变形及产品的最终性能。基于先前的热变形试验,建立SP2215合金的材料模型,并利用有限元软件Simufact Forming 16.0对合金的斜轧穿孔过程进行模拟,分析了穿孔过程中管坯金属流动、应变场、应力场、应变速率场、温度场及穿孔机穿孔作用力的动态变化,模拟结果与实际变形规律相符。进而探讨了顶伸量、轧辊转速、管坯初始温度等工艺参数对合金热穿孔行为与微观组织的影响,最终获得合金的最佳斜轧穿孔工艺为:顶伸量50 mm、轧辊间距95.84 mm、导板间距116.06 mm、轧辊转速50 r/min、管坯初始温度1 100~1 150 ℃。
In the process of rotary rolling and piercing for austenitic heat-resistant alloy, the improper selection of process parameters may result in phenomena such as coarse grain and mixed crystal in the pipe billet, or even fracture during processing, thereby impacting subsequent deformation and final product performance. Based on the previous thermaldeformation tests, this study established a material model for SP2215 alloy and utilized finite element software Simufact Forming 16.0 to simulate the rotary rolling and piercing of the alloy. The study analyzed dynamic changes in metal flow, strain field, stress field, strain rate field, temperature field, and rolling force during the skew rolling process. The simulation results are consistent with the actual deformation patterns. Furthermore, this study explored how process parameters such as head forward amount, roll speed, and initial temperature of billet affect both skew rolling performance and microstructure of the alloy. Ultimately an optimal rotary rolling and piercing process for the alloy is determined: head forward amount of 50 mm; roller spacing of 95.84 mm; guide plate spacing of 116.06 mm; roller speed at 50 r/min; and initial temperature range for tube billet at 1 100 ℃-1 150 ℃.
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