热处理前后镍基高温合金激光熔覆层的组织和力学性能
Microstructure and Mechanical Properties of Laser Cladded Ni-based Superalloy Coating before and after Heat Tratment
摘 要
在GH4169高温合金板表面制备了GH4169合金激光熔覆层, 然后对其进行了完全热处理、980STA热处理和双时效热处理, 对热处理前后熔覆层的显微组织和力学性能进行了研究。结果表明: 热处理前, 熔覆层的顶部为等轴晶, 中部和底部为树枝晶和等轴晶的混合形态; 热处理后, 熔覆层中粗大的树枝晶组织有不同程度的细化, 熔覆层的显微硬度和抗拉强度显著提高; 完全热处理后, 熔覆层的断裂形式主要为韧性断裂, 980STA热处理和双时效热处理后, 断裂形式为韧性断裂和脆性断裂共存的混合型断裂。
激光熔覆
GH4169高温合金
显微组织
力学性能
heat treatment
laser cladding
GH4169 superalloy
microstructure
mechanical property
Abstract
GH4169 laser cladded coating was prepared on GH4169 superalloy plate surface, and then the cladded coating was heat treated using the heat treatment regimens of full heat treatment, 980STA standard heat treatment and double aging heat treatment. The microstructures and mechanical properties of the cladded coating before and after heat treatment were studied. The results show that before heat treatment, the cladded coating were presented as equiaxial grains in the upper region, and mixed dendrite and equiaxial grains in the middle region and bottom region. After heat treatment, the coarse dendrite was refined, and the microhardness and tensile strength of the sample with cladded coating were improved significantly. The fracture modes of the cladded coating after full heat treatment was ductile fracture; after 980STA treatment and double aging heat treatment, the fracture mode were controlled together by ductile fracture and brittle fracture.
中图分类号 TG174.4 DOI 10.11973/jxgccl201611005
所属栏目 试验研究
基金项目 国家自然科学基金资助项目(51401037); 苏州市工业支持项目(SYG201421); 江苏省教育厅高校自然科学基金资助项目(14KJB430001); 江苏省大型工程装备检测与控制重点建设实验室开放项目(JSKLEDC201409); 江苏省机电产品循环利用技术重点建设实验室开放项目(KF1501)
收稿日期 2016/1/5
修改稿日期 2016/9/1
网络出版日期
作者单位点击查看
备注张尧成(1985-), 男, 湖北天门人, 讲师, 博士。
引用该论文: ZHANG Yao-cheng,HUANG Xi-wang,YANG Li,CHEN Hong-zhou,DAI Jun,ZHANG Ning. Microstructure and Mechanical Properties of Laser Cladded Ni-based Superalloy Coating before and after Heat Tratment[J]. Materials for mechancial engineering, 2016, 40(11): 22～26
张尧成,黄希望,杨 莉,陈洪洲,戴 军,张 宁. 热处理前后镍基高温合金激光熔覆层的组织和力学性能[J]. 机械工程材料, 2016, 40(11): 22～26
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参考文献
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【2】周建忠. 激光快速制造技术及应用［M］. 北京: 化学工业出版社, 2009: 143-145.
【3】WEN P, FENG Z, ZHENG S. Formation quality optimization of laser hot wire cladding for repairing martensite precipitation hardening stainless steel［J］. Optics & Laser Technology, 2015, 65: 180-188.
【4】WEN P, CAI Z, FENG Z, et al. Microstructure and mechanical properties of hot wire laser clad layers for repairing precipitation hardening martensitic stainless steel ［J］. Optics & Laser Technology, 2015, 75: 207-213.
【5】ZHANG Y C, YANG L, DAI J, et al. Grain growth of Ni-based superalloy IN718 coating fabricated by pulsed laser deposition ［J］.Optics & Laser Technology,2016,80: 220-226.
【6】ZHANG Y C, LI Z G, NIE P L, et al. Carbide and nitride precipitation during laser cladding of Inconel 718 alloy coatings ［J］. Optics & Laser Technology, 2013, 52: 30-36.
【7】LI G J, LI J, LUO X. Effects of high temperature treatment on microstructure and mechanical properties of laser-clad NiCrBSi/WC coatings on titanium alloy substrate ［J］. Materials Characterization, 2014, 98: 83-92.
【8】OBADELE B A, ANDREWS A, OLUBAMBI P A, et al. Effect of ZrO2 addition on the dry sliding wear behavior of laser clad Ti6Al4V alloy ［J］. Wear, 2015, 328/329: 295-300.
【9】张哲豪, 周后明, 胡铁千, 等. 钕加入量对Cr12MoV模具钢表面激光熔覆镍基合金层组织和性能的影响［J］. 机械工程材料, 2016, 40(2): 79-83.
【10】张光耀, 王成磊, 高原, 等. 铝合金表面2%CeO2/Ni60A激光熔覆层的组织及耐腐蚀性能［J］. 机械工程材料, 2015, 39(7): 69-72.
【11】赵卫卫, 林鑫, 刘奋成, 等. 热处理对激光立体成形Inconel718高温合金组织和力学性能的影响［J］. 中国激光, 2009, 36(12): 3220-3225.
【12】卞宏友, 赵翔鹏, 杨光, 等. 激光沉积修复GH4169合金热处理的组织及性能［J］. 中国激光, 2015, 42(12): 161-168.
【13】ZHANG Y C, LI Z G, NIE P L, et al. Effect of heat treatment on niobium segregation of laser-cladded IN718 alloy coating ［J］. Metallurgical and Materials Transactions A, 2013, 44: 708-716.
【14】ZHONG C, GASSER A, KITTEL, J, et al. Improvement of material performance of Inconel 718 formed by high deposition-rate laser metal deposition ［J］. Materials & Design, 2016, 98: 128-134.
【15】QI H, AZER M, RITTER A. Studies of standard heat treatment effects on microstructure and mechanical properties of laser net shape manufactured INCONEL 718 ［J］. Metallurgical and Materials Transactions A, 2009, 40: 2410-2422.
【16】LIU F, LIN X, HUANG C, et al. The effect of laser scanning path on microstructures and mechanical properties of laser solid formed nickel-base superalloy Inconel 718 ［J］. Journal of Alloys and Compounds, 2011, 509: 4505-4509.
【17】张尧成. 激光熔覆INCONEL 718合金涂层的成分偏聚与强化机理研究［D］. 上海: 上海交通大学, 2013.
【18】LIU F C, LIN X, ZHAO W W, et al. Effects of solution treatment temperature on microstructures and properties of laser solid forming GH4169 superalloy［J］. Rare Metal Materials and Engineering, 2010, 39: 1519-1524.
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