刘伟,康全,李阳,刘俐超,周志民,张军磊,杨眉.热处理对Inconel625/X90堆焊层组织及性能的影响[J].表面技术,2018,47(6):83-88.
LIU Wei,KANG Quan,LI Yang,LIU Li-chao,ZHOU Zhi-min,ZHANG Jun-lei,YANG Mei.Effects of Heat Treatment on Microstructure and Properties of Inconel625/X90 Surfacing Layer[J].Surface Technology,2018,47(6):83-88 |
| 热处理对Inconel625/X90堆焊层组织及性能的影响 |
| Effects of Heat Treatment on Microstructure and Properties of Inconel625/X90 Surfacing Layer |
| 投稿时间：2017-11-02 修订日期：2018-06-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2018.06.013 |
| 中文关键词: 堆焊 热处理 显微组织 力学性能 魏氏组织 |
| 英文关键词:surfacing heat treatment microstructure mechanical property Widmanstatten structure |
| 基金项目:大学生创新创业计划训练项目（201710615064）；四川省高等学校油气田材料重点实验室项目（X151517KCL02）；西南石油大学课外开放实验重点项目（KSZ17126） |
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| Author | Institution |
| LIU Wei | School of Material Science and Engineering, Southwest Petroleum University, Chengdu 610500, China |
| KANG Quan | School of Material Science and Engineering, Southwest Petroleum University, Chengdu 610500, China |
| LI Yang | Sichuan Petroleum and Natural Gas Construction Engineering Co., Ltd, Chengdu 610500, China |
| LIU Li-chao | School of Material Science and Engineering, Southwest Petroleum University, Chengdu 610500, China |
| ZHOU Zhi-min | School of Material Science and Engineering, Southwest Petroleum University, Chengdu 610500, China |
| ZHANG Jun-lei | School of Material Science and Engineering, Southwest Petroleum University, Chengdu 610500, China |
| YANG Mei | School of Material Science and Engineering, Southwest Petroleum University, Chengdu 610500, China |
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| 中文摘要: |
| 目的 研究不同固溶温度对堆焊层组织及力学性能的影响规律。方法 对Inconel625堆焊层分别进行850、910、980 ℃的固溶处理，采用金相显微镜、SEM、EDS进行显微组织观察及堆焊层元素分析，并测试其硬度。结果 堆焊熔合线附近出现魏氏组织和马氏体层，且合金元素含量迥异，在基材和熔敷金属之间形成较高的浓度差，使硬度分布极不均匀，经不同热处理后，魏氏组织得以消除，马氏体层也随着温度的增加而逐渐消失，合金元素的分布变均匀。850 ℃固溶处理后，敷材扩散区的Ni、Cr和Fe质量分数分别为36.14%、28.31%和18.27%，相比于堆焊态，合金元素发生了较大扩散；980 ℃固溶处理时，合金元素的分布最均匀，相对于堆焊态合金元素的含量，Ni含量下降约16.27%，Cr含量下降约8.32%，Fe含量上升约37.76%。未处理时的硬度从敷材至基材呈先下降、后升高的V型趋势，经850 ℃和980 ℃固溶处理后，试样硬度趋于均匀，热影响区硬度比未处理的有明显提高，分别提高24HV和32HV。结论 热处理后，堆焊层的组织及元素分布变均匀，硬度分布曲线趋于直线，并随固溶温度的升高，各区元素含量的波动逐渐减小，元素分析曲线过渡平滑，晶粒度逐渐增大。 |
| 英文摘要: |
| The work aims to study the law of influence of different solution temperature on microstructure and mechanical properties of surfacing. Solution treatment was applied to Inconel625 surfacing layer at 850 ℃, 910 ℃ and 980 ℃, respectively. The microstructure of surfacing layer was observed and surfacing layer elements were analyzed with metallurgical microscope, SEM and EDS. Hardness of the layer was tested as well. The results showed that there were Widmanstatten structure, Martensitic layers, and content of alloying element varied significantly around surfacing weld line. High concentration difference between substrate and deposited metal resulted in an extremely uneven hardness distribution. After different heat treatment, Widmanstatten structure was eliminated, Martensite layer also gradually disappeared as the temperature increased, the distribution of alloying elements became uniform. The content of Ni, Cr and Fe in the diffusion zone changed to 36.14%, 28.31% and 18.27% at 850 ℃. Compared with the content of alloying element in surfacing state, the content of Ni, Cr and Fe in the diffusion zone changed greatly, and the element distribution was the most uniform at 980 ℃. In alloying elements, the content of Ni decreased by nearly 16.27%, the content of Cr decreased by nearly 8.32% and the content of Fe increased by nearly 37.76%. Untreated hardness from the dressing to the substrate first decreased and then increased (V trend), sample hardness at 850 ℃ and 980 ℃ tended to be uniform, hardness of heat-affected zone was 24HV and 32HV, respectively, obviously higher than that of untreated zone. After heat treatment, microstructure and element distribution of surfacing layer become uniform, and hardness tends to be linear. With the increase of solution temperature, the content of elements in each zone decreases gradually, the curve transits smoothly and grain size increases gradually. |
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