局部感应钎焊锯片基体的热变形分析

侯超鹏; 李奇林; 丁凯; 雷卫宁; 任维彬; 韩锦锦

doi:10.13394/j.cnki.jgszz.2022.0097

局部感应钎焊锯片基体的热变形分析

doi: 10.13394/j.cnki.jgszz.2022.0097

江苏理工学院机械工程学院, 江苏常州 213001

基金项目: 国家自然科学基金（51905234）；江苏省高校自然科学研究重大项目（22KJA460004）；江苏理工学院研究生实践创新计划项目（XSJCX21_19）。

详细信息

通讯作者:
李奇林，男，1984年生，副教授、博士。主要研究方向：超硬磨料感应钎焊技术。E-mail：liqilin@jsut.edu.cn

中图分类号: TG74; TQ164
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- 文章访问数: 673
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- PDF下载量: 40
- 被引次数: 0
出版历程
- 收稿日期: 2022-06-24
- 修回日期: 2022-12-04
- 录用日期: 2023-12-07
- 刊出日期: 2023-04-20

Analysis of thermal deformation of substrate of local induction brazed saw blade

School of Mechanical Engineering, Jiangsu Institute of Technology, Changzhou 213001, Jiangsu, China

摘要

摘要:
针对钎焊锯片基体在高温条件下的热变形问题，在有限元软件中对局部感应钎焊锯片基体的温度、组织以及应力应变场进行分析，研究影响锯片基体变形的因素。结果显示：锯片基体发生的相变主要分布在钎焊工作面上，冷却至室温后主要得到铁素体、珠光体、贝氏体3种组织。当热源的扫描速度增大，基体的变形量以及残余应力都随之增大。当扫描速度从0.25 mm/s增至2.00 mm/s时，相变层厚度从5.8 mm降至4.7 mm，最大变形量从0.41 mm增至0.82 mm，且残余应力从482 MPa增至667 MPa。试验与仿真结果基本一致。
- 局部感应钎焊 /
- 相变 /
- 热变形 /
- 钎焊温度 /
- 锯片
Abstract:
In order to solve the problem of thermal deformation of brazed saw blade substrate under high temperature, the temperature, the microstructure and the stress-strain field of local induction brazed saw blade substrate were analyzed with the finite element software, and the factors affecting the deformation of saw blade substrate were studied. The results show that the phase transformation of the saw blade substrate is mainly distributed on the brazing working surface. After cooling to room temperature, three microstructures including ferrite, pearlite, bainite and trace martensite are obtained. When the scanning speed of the heat source increases, the deformation and the residual stress of the substrate increase. When the scanning speed increases from 0.25 mm/s to 2.00 mm/s, the thickness of the phase change layer decreases from 5.8 mm to 4.7 mm, the maximum deformation increases from 0.41 mm to 0.82 mm, and the residual stress increases from 482 MPa to 667 MPa. The test results are basically consistent with the simulation results.
- local induction brazing /
- phase transformation /
- thermal deformation /
- brazing temperature /
- saw blade

HTML全文

图 1 局部感应钎焊过程示意图和照片

Figure 1. Schematic diagram and photo of local induction brazing process

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图 2 热源的高斯分布

Figure 2. Gaussian distribution of the heat source

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图 3 锯片尺寸示意图

Figure 3. Schematic diagram of saw blade size

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图 4 网格划分

Figure 4. Meshing

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图 5 热源功率与钎焊温度的关系

Figure 5. Relationship between heat source powers and brazing temperatures

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图 6 瞬时温度场云图

Figure 6. Instantaneous temperature field nephogram

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图 7 节点位置示意图

Figure 7. Schematic diagram of node location

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图 8 温度时间曲线

Figure 8. Temperature time curves

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图 9 感应钎焊时组织体积分数及温度随时间的变化

Figure 9. Change of microstructure volume fraction and temperature with time in induction brazing

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图 10 各扫描速度下组织体积分数的变化

Figure 10. Changes of tissue proportions at various scanning speeds

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图 11 组织场云图

Figure 11. Organization field nephogram

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图 12 各扫描速度下组织的相变层厚度变化

Figure 12. Thickness change of phase change layer of microstructure at various scanning speeds

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图 13 工作面附近的组织场形貌

Figure 13. Morphology of the organization field near the working face

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图 14 路径示意图

Figure 14. Schematic diagram of path

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图 15 路径上的变形量及残余应力变化

Figure 15. Deformation and residual stress changes on the path

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图 16 变形量随温度的变化

Figure 16. Variation of deformation amount with temperature

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图 17 残余应力随温度的变化

Figure 17. Variation of residual stress with temperature

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图 18 三坐标测量示意图

Figure 18. Schematic diagram of three-coordinate measurement

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图 19 试验值与仿真数据对比

Figure 19. Comparison of experimental values and simulation data

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表 1 局部感应钎焊工艺参数

Table 1. Local induction brazing process parameters

工艺参数取值

热源扫描速度 v / (mm·s⁻¹) 0.25，0.50，1.00，2.00
热源功率 Q / W 67.4～370.0

下载: 导出CSV

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