锻压技术

扫描方式对激光立体成形GH4169合金高温力学性能和热疲劳性能的影响

英文标题：Influences of scanning method on mechanical properties at high temperature and thermal fatigue property of laser solid forming alloy GH4169

作者：刘晓璇刘江波

单位：河北轨道运输职业技术学院

关键词：激光立体成形扫描方式 GH4169高温合金热疲劳性能高温力学性能

分类号：TG146

出版年,卷(期):页码：2017,42(12):140-143

摘要：

扫描方式是激光立体成形的一个重要工艺参数，选择3种不同的扫描方式对GH4169高温合金进行激光立体成形试验，并进行了500 ℃高温力学试验和1000次25~500 ℃冷热循环的热疲劳试验。结果表明：与沿长边平行往复扫描相比，长短边交替平行往复扫描时合金的抗拉强度和屈服强度分别增大了82 和79 MPa，断后伸长率基本不变，热疲劳裂纹级别从7级变为2级。沿短边平行往复扫描时，合金力学性能和热疲劳性能介于沿长边平行往复扫描和长短边交替平行往复扫描之间。扫描方式优选为：长短边交替平行往复扫描。

Scanning method is an important process parameter of laser solid forming. Superalloy GH4169 specimens were produced by laser solid forming with three different kinds of scanning methods, and the specimens were conducted by mechanical test at high temperature of 500 ℃ and thermal fatigue tests between 25 ℃ and 500 ℃ for 1000 times. The results show that comparing with the parallel scanning along the long side, the tensile and yield strength of the alloy by alternate parallel scanning along the long and short sides are increased by 82 MPa and 79 MPa, and the elongation stain is unchanged basically, while the thermal fatigue crack grade changes from grade 7 to grade 2. The mechanical properties and thermal fatigue property of alloy by the parallel scanning along the short side are between parallel scanning along the long side and alternating parallel scanning along the long and short sides. Thus, the alternating parallel scanning of long and short sides is the optimized scanning method.

基金项目：

河北省人力资源和社会保障厅科研项目（JRSHZ-2016-01126）

作者简介：刘晓璇（1983-），女，硕士，讲师 E-mail：xg9472@163.com 通讯作者：刘江波（1983-），男，硕士，讲师 E-mail：baobao727@163.com

参考文献：

［1］张小红,林鑫,陈静,等.热处理对激光立体成形TA15合金组织及力学性能的影响[J].稀有金属材料与工程,2011,40(1):142-147.

Zhang X H, Lin X, Chen J, et al. Effects of heat treatment on the microstructures and mechanical properties of TA15 titanium alloys by laser solid forming [J].Rare Metal Materials and Engineering, 2011,40(1):142-147.

［2］张凤英,陈宏,徐义库,等.Mo含量对激光立体成形Ti-

6Al-Mo系合金组织及硬度的影响[J].稀有金属材料与工程,2013,42(7):1332-1336.

Zhang F Y, Chen H, Xu Y K, et al. Influence of Mo content on microstructure and microhardness of laser solid formed Ti-6Al-Mo system alloys [J]. Rare Metal Materials and Engineering, 2013, 42(7):1332-1336.

［3］赵晓明,巩水利,林鑫,等.激光立体成形Rene88DT高温合金γ′相的高温粗化行为研究[J].稀有金属材料与工程,2012,41(4):603-606.

Zhao X M, Gong S L, Lin X, et al. Coarsening behavior of γ′ precipitates in laser solid forming Rene88DT superalloy during high temperature treatment [J].Rare Metal Materials and Engineering, 2012,41(4):603-606.

［4］陈慧,杜珊珊,甄平,等.激光立体成形多孔钛对成骨细胞的增殖及RANKL和OPG表达的影响[J].中南大学学报：医学版,2016,41(12):1278-1284.

Chen H, Du S S, Zhen P, et al. Effects of laser solid forming of porous titanium on proliferation of osteoblast and RANKL/OPG expression [J]. Journal of Central South University: Medical Science, 2016, 41(12):1278-1284.

［5］刘莹莹,姚暖,何磊,等.热处理对激光立体成形Ti3Al/TC11连接界面组织性能的影响[J].中国科技论文,2014,(2):234-237,242.

Liu Y Y, Yao N, He L, et al. Effect of heat treatment on microstructure and properties of laser solid forming Ti3Al /TC11 interface [J].China Sciencepaper,2014,(2):234-237,242.

［6］刘军,陈慧,甄平,等.激光立体成形多孔钛对成骨细胞的影响及生物相容性研究[J].中国矫形外科杂志,2016,24(1):61-66.

Liu J, Chen H, Zhen P, et al. The effect of porous titanium fabricated by LSF on osteoblast and its biocompatibility in vivo[J]. Orthopedic Journal of China, 2016, 24(1):61-66.

［7］郑星,薛蕾,黄卫东,等.混合元素法激光立体成形中粉末配比的研究[J].热加工工艺,2012,41(18):21-23.

Zheng X, Xue L, Huang W D, et al. Powder proportion during laser solid forming from blended element powders[J]. Hot Working Technology, 2012, 41(18):21-23.

［8］张方,王林歧. 国内外GH4169棒材质量稳定性分析[J].锻压技术,2016,41(9):111-120.

Zhang F, Wang L Q. Analysis on quality stability of alloy GH4169 bars at home and abroad[J]. Forging & Stamping Technology, 2016, 41(9):111-120.

［9］GB/T 15824—2008, 热作模具钢热疲劳试验方法[S].

GB/T 15824—2008, Thermal fatigue testing method for hot die steel[S].

服务与反馈：

【文章下载】【加入收藏】