锻压技术

10%Cr钢高温流动特性研究及数值模拟

英文标题：Study on flow properties of 10% Cr steel at high temperature and numerical simulation

作者：朱罗北何建丽杨嘉良

单位：上海工程技术大学

分类号：TG376.3

出版年,卷(期):页码：2018,43(4):141-145

摘要：

X12CrMoWVNbN10-1-1（X12）铁素体耐热钢是核电转子常用材料，为研究其在高温条件下的变形行为，利用Gleeble-3800热力模拟实验机进行了应变速率为0.01~1 s-1、温度在1050~1250 ℃条件下的热压缩实验。实验表明，在压下量为25%时，材料仅在应变速率为1 s-1并且流动应力达到最大值后会发生明显的软化现象。同时，利用实验获取的材料数据，输入Deform-3D软件，进行了压下量为20%、应变速率为0.1 s-1时不同温度条件下的数值模拟，并对此种条件下的等效应力、等效应变和最大主应力的分布进行了分析讨论。结果表明：随着温度的升高，等效应变分布均匀，等效应力和最大主应力逐渐下降，并且最大主应力的减小幅度变大。

The ferrite heat-resistant steel X12CrMoWVNbN10-1-1 (X12) is often used in nuclear rotor. In order to study its deformation behavior at high temperature, the hot compression experiments were conducted by the Gleeble-3800 thermal simulation machine at different temperatures of 1050-1250 ℃ as well as different strain rates of 0.01-1 s-1. The experiments show that the material obviously softens at the reduction of 25% when the strain rate is 1 s-1 and the flow stress reaches the maximum. At the same time, the material data obtained by experiments were imported into Defrom-3D software, and the numerical simulations at different temperatures were conducted under the reduction of 20% and the strain rate of 0.1 s-1. Furthermore, the distributions of equivalent stress, equivalent strain and the maximum principal stress were analyzed and discussed. The results show that with the increasing of temperature, the distribution of equivariant strain is uniform, the equivalent stress and the maximum principal stress gradually decrease, and the decreasing degree of the maximum principal stress becomes larger.

基金项目：

上海高校青年教师培养资助计划（ZZGCD15034）

朱罗北（1991-），男，硕士研究生；E-mail：ll_zlb@126.com；通讯作者：何建丽（1979-），女，博士，讲师；E-mail：hejianling792@sues.edu.cn

参考文献：

[1]Masuyama F. History of power plants and progress in heat resistant steels [J]. ISIJ International, 2001, 41(6): 612-625.

[2]王凤喜. 大锻件生产行业与锻造技术发展[J]. 锻压装备与制造技术，2002, 37 (4): 3-6.

Wang F X. Large forgings industry ＆ development of forging technique [J]. China Metalforming Equipment & Manufacturing Technology, 2002, 37 (4): 3-6.

[3]沈邱农，陈文辉. 超超临界汽轮机的技术特点[J]. 动力工程学报，2002，22(2): 1659-1663.

Shen Q N, Chen W H. Technical characters for ultra-supercritical steam turbine[J]. Journal of Chinese Society of Power Engineering, 2002, 22(2): 1659-1663.

[4]Lu Z Q，Ju F M. Research on Material for Ultra-super Critical Steam Turbine Unit[M]. Berlin, Germany: Springer Berlin Heidelberg, 2007.

[5]辛向阳，刘方红，邓蜀宁. 大锻件锻造方法综述[J]. 大型铸锻件, 1999, (1):43-48.

Xin X Y, Liu F H, Deng S N. The summarization of heavy forging technique [J]. Heavy Casting and Forging, 1999, (1): 43-48.

[6]董鑫，高秋志，李超，等. 9Cr-1.7W-0.4Mo-Co铁素体耐热钢等温时效的组织演变[J]. 材料热处理学报，2015, 36(S2):81-87.

Dong X, Gao Q Z, Li C, et al. Microstructure evolution of 9Cr-1.7W-0.4Mo-Co ferritic heat-resistant steel during isothermal aging[J]. Transactions of Materials and Heat Treatment , 2015, 36 (S2): 81-87.

[7]崔慧然，孙锋，梅林波，等. 超超临界汽轮机转子X12CrMo WVNbN10-1-1钢的早期断裂分析[J]. 动力工程学报，2010, 30（4）:298-303.

Cui H R, Sun F, Mei L B, et al. Analysis on premature fracture of X12CrMoWVNbN10-1-1 steel for USC steam turbine rotors [J]. Journal of Chinese Society of Power Engineering, 2010, 30 (4): 298-303.

[8]张学奇，董万鹏，苏钰，等. 基于Deform-3D的花键轴叉热锻成形工艺优化[J]. 锻压技术，2017, 42(1):5-9.

Zhang X Q, Dong W P, Su Y, et al. Process optimization on hot forging for spline shaft fork based on Deform-3D[J]. Forging & Stamping Technology, 2017, 42(1):5-9.

[9]薛勇，李宏, 张治民, 等. 环形通道形型腔结构对杯状件反挤压成形的影响研究[J].塑性工程学报, 2017, 24(1):15-23.

Xue Y, Li H, Zhang Z M, et al. Effects of annular channel structure on backward extrusion forming of a cup shell[J]. Journal of Plasticity Engineering, 2017, 24(1): 15-23.

[10]Wahabi M E, Cabrera J M, Prado J M. Hot working of two AISI 304 steels: A comparative study[J]. Materials Science and Engineering: A, 2003, 343 (1-2): 116-125.

[11]Kim S I, Lee Y, Byon S M. Study on constitutive relation of AISI 4140 steel subject to large strain at elevated tempera- tures[J]. Journal of Materials Processing Technology, 2003, 140 (1-3): 84-89.

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