锻压技术

超超临界机组用Sanicro25大口径钢管制造工艺

英文标题：Manufacturing process of large-diameter Sanicro25 steel pipe for USC

分类号：TG376.2

出版年,卷(期):页码：2025,50(3):243-247

摘要：

针对先进超超临界发电机组用Sanicro25大口径厚壁无缝钢管的需求，内蒙古北方重工业集团有限公司利用3.6万吨垂直挤压机试制了规格为Ф500 mm×Ф335 mm×3000 mm的大口径厚壁钢管，钢管表面质量良好。大口径厚壁钢管试样经温度为1180 ℃、时间分别分别为30和60 min的固溶处理后的综合性能均较佳，性能指标相当，屈服强度分别347.5 和345.5 MPa，抗拉强度分别为735 和730 MPa，冲击功分别为110和102 J，晶粒度分别为4.5和4.0级，力学性能超出了小口径管标准的要求。大口径厚壁管的纵向力学性能和冲击性能达到了交货态小口径管的水平，但横纵向冲击性能相差较大，主要原因是钢管挤压后沿纵向纤维方向的抗裂纹扩展能力更强。

For the demand for large-diameter thick-walled seamless pipes of Sanicro25 steel for advaced ultra supercritical units(USC), a trial production of large-diameter thick-walled pipes with the specifications of Ф500 mm×Ф335 mm×3000 mm was conducted by Inner Mongolia North Heavy Industries Group Corp. Ltd. using a 36,000-ton vertical extruder. The surface quality of the steel pipes was excellent. Specimens extracted from the large-diameter thick-walled steel pipes were subjected to solution treatment at 1180 ℃ for 30 and 60 min respenctively, both of which demonstrated favorable comprehensive properties. Comparable performance indicators were achieved, including the yield strengths of 347.5 and 345.5 MPa, the tensile strengths of 735 and 730 MPa, the impact energies of 110 and 102 J, and the grain sizes of 4.5 and 4.0 grades The mechanical properties exceed the requirements specified for small-diameter pipe standards. The longitudinal mechanical properties and impact property of the large-diameter thick-walled pipes matched those of as-delivered small-diameter pipes.However, a significant discrepancy was observed between transverse and longitudinal impact properties, which was attributed to the enhanced crack propagation resistance along the longitudinal fiber direction in steel pipe after extrusion.

基金项目：

作者简介：李永清（1973-），男，正高级工程师 E-mail：yqllyq123@163.com

参考文献：

[1]朱传志,袁勇,尹宏飞,等.超超临界机组用Sanicro25耐热钢研究进展[J].材料导报,2017,31(13):78-84.

Zhu C Z, Yuan Y, Yin H F, et al. Research progress of austenitic heat resistant steel Sanicro25 used in ultra supercritical unit [J]. Materials Reports,2017,31(13):78-84.

[2]刁旺战,王萍，欧海燕,等.先进超超临界锅炉用钢Sanicro25焊接接头性能的试验研究[J].锅炉制造,2017(1):51-53，62.

Diao W Z, Wang P, Ou H Y, et al. Study on welding process performance of sanicro25 welded joints for A-USC boiler [J]. Boiler Manufacturing, 2017(1):51-53，62.

[3]王斌,梁军,荆洪阳,等.焊接材料对Sanicro25/T92异种钢接头组织及力学性能的影响[J].焊接技术,2016,45(6):27-30，98.

Wang B, Liang J, Jing H Y, et al. Study on the microstructure and properties of welding consumables of Sanicro25/T92 dissimilar welded joint[J]. Welding Technology,2016,45(6):27-30，98.

[4]王崇斌,诸育枫,王煜,等.700 ℃超超临界机组锅炉过热器选材分析[J].发电设备,2016,30(3):168-172.

Wang C B, Zhu Y F, Wang Y, et al. Materials selection for boiler superheater of 700 ℃ ultra supercritical units[J]. Power Equipment,2016,30(3):168-172.

[5]敬仕煜,何小明,张玮,等.650 ℃先进超超临界锅炉高温部件选材探讨[J].发电设备,2023,37(5):310-316.

Jing S Y, He X M, Zhang W, et al. Discussion on material selection of high-temperature components for 650 ℃ advanced ultra-supercritical boilers[J]. Power Equipment,2023,37(5):310-316.

[6]王永发. Sanicro25高温时效及与T92焊接接头组织性能研究[D].天津：天津大学,2016.

Wang Y F. Study on High Temperature Aging Property of Sanicro25 and Microstructures and Properties of Sanicro25/T92 Welded Joints[D]. Tianjin：Tianjin University,2016.

[7]张显.超超临界锅炉用奥氏体耐热钢Sanicro25的性能[J].发电设备,2015,29(6):439-442.

Zhang X. Properties of austenitic heat-resistant steel Sanicro25 for ultra-supercritical boilers[J]. Power Equipment,2015,29(6):439-442.

[8]陈亮,卢征然.700 ℃超超临界锅炉高温过热器再热器用Sanicro25新材料焊接工艺研究[J].锅炉技术,2015,46(5):49-53.

Chen L, Lu Z R. Research on welding process of Sanicro25 alloy for high-temperature superheaters and reheaters in 700 ℃ ultra-supercritical boilers [J]. Boiler Technology,2015,46(5):49-53.

[9]栗清振. 材料创新让燃煤锅炉实现最佳燃煤效率[N]. 中国电力报,2015-07-02(6).

Li Q Z. Material innovation enables coal-fired boilers to achieve optimal coal combustion efficiency [N]. China Electric Power News,2015-07-02(6).

[10]赵博. W含量对Sanicro25钢组织和性能的影响[D].昆明：昆明理工大学,2013.

Zhao B. The Effect of W Content on the Microstructure and Properties of Sanicro25 Steel [D]. Kunming：Kunming University of Science and Technology,2013.

[11]翟月雯.P91合金钢晶粒演化特征研究与厚壁管热挤压工艺数值模拟[D].北京：中国机械科学研究总院集团有限公司,2013.

Zhai Y W. A Study on Grain Evolution Characteristics of P91 Steel and Numerical Simulation of Hot Extrusion of Thick Wall Tube[D]. Beijing:China Academy of Machinery Science and Technology Group Co.,Ltd.,2013.

[12]刘海江,雷丙旺,胡永平,等.大长径比管坯挤压工艺数值模拟及试制[J].塑性工程学报,2023,30(12):24-30.

Liu H J, Lei B W, Hu Y P, et al. Numerical simulation and trail production of extrusion technology for pipe billet with large length to diameter ratio[J]. Journal of Plasticity Engineering,2023,30(12):24-30.

[13]贾晓斌,秦瑞廷,涂明金,等.挤压316H奥氏体不锈钢大口径管材的晶粒度控制[J].金属热处理,2024,49(4):168-174.

Jia X B, Qin R T, Tu M J, et al. Grain size control of extruded 316H austenitic stainless steel large-diameter pipes [J]. Heat Treatment of Metals,2024,49(4):168-174.

[14]ASME SA-213/SA-213M, 锅炉、过热器和换热器用铁素体和奥氏体合金钢无缝钢管规范[S].

ASME SA-213/SA-213M, Specification for seamless ferritic and austenitic alloy-Steel boiler, superheater, and heat-exchanger tubes[S].

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