Preparation and properties of titanium clad steel plate with interlayer in laser cladding

ZHAO Zhi-wei; WANG Xu-yue; YU Dong-yang; WANG Cun-shan

doi:10.3788/OPE.20162413.0012

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Preparation and properties of titanium clad steel plate with interlayer in laser cladding

更新时间：2020-08-13

- Preparation and properties of titanium clad steel plate with interlayer in laser cladding
- Optics and Precision Engineering Vol. 24, Issue 10s, Pages: 12-19(2016)
- 作者机构：
  
  1. 大连理工大学机械工程学院,辽宁大连,116024
  2. 大连理工大学三束材料改性教育部重点实验室,辽宁大连,116024
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20162413.0012
  CLC： TN249;TG113.25
- Received：28 May 2016，
  
  Revised：12 June 2016，
  
  Published：14 November 2016
- 稿件说明：
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赵志伟, 王续跃, 于冬洋等. 中间层法钛/钢层合板激光熔覆制备及性能[J]. 光学精密工程, 2016,24(10s): 12-19

ZHAO Zhi-wei, WANG Xu-yue, YU Dong-yang etc. Preparation and properties of titanium clad steel plate with interlayer in laser cladding[J]. Editorial Office of Optics and Precision Engineering, 2016,24(10s): 12-19
赵志伟, 王续跃, 于冬洋等. 中间层法钛/钢层合板激光熔覆制备及性能[J]. 光学精密工程, 2016,24(10s): 12-19 DOI： 10.3788/OPE.20162413.0012.

ZHAO Zhi-wei, WANG Xu-yue, YU Dong-yang etc. Preparation and properties of titanium clad steel plate with interlayer in laser cladding[J]. Editorial Office of Optics and Precision Engineering, 2016,24(10s): 12-19 DOI： 10.3788/OPE.20162413.0012.

摘要

针对激光熔覆制备钛/钢层合板时覆层与基层结合性能较差的问题，通过添加一定比例的钛铁混合粉末作为中间层的方法，提高钛/钢层合板的制备质量。采用光学显微镜（OM）、扫描电子显微镜（SEM）及能谱分析仪（EDS）对Ti含量分别为0%，5.5%和11.5%的试件进行了组织和成分分析，在拉伸试验机上进行拉剪性能检测，并对剪切断口形貌进行观察分析。结果表明，中间层材料与基体都能形成冶金结合，中间层钛含量小于11.2%时，钛熔覆层能与中间层形成牢靠结合；钛熔覆层中上部生成纯钛等轴晶组织，晶内为针状马氏体组织，钛熔覆层下部为胞状（β-Ti+TiFe）共晶组织；钛熔覆层硬度为工业纯钛的2~3倍；在中间层钛含量为5.5%时，钛熔覆层与中间层结合强度最大为14 MPa；钛/钢层合板的剪切强度差异主要由晶粒尺寸决定，剪切断裂为沿晶脆性断裂。该研究结果可为激光熔覆制备钛/钢层合板提供了理论基础和实验依据。

Abstract

In consideration of the weak bonding property between the cladding and base course during preparation of the titanium/steel sandwich plate through laser cladding

the method of adding a certain proportion of Ti-Fe mixed powder was adopted to improve the preparation quality of the sandwich plate. The optical microscope (OM)

scanning electron microscope (SEM) and energy dispersive spectrometer (EDS) were employed to analyze the structure and composition of the test pieces with Ti content of 0%

5% and 11.5%. Then tension-shear performance tests were performed and the morphologies of the shear fracture were observed. The test result indicates that both of the interlayer materials and substrate can achieve the metallurgical bonding. When the interlayer titanium content less than 11.2wt%

the titanium cladding layer can be securely bonded with the interlayer

at the top of which was pure titanium equiaxed crystal and the bottom part was cellular (β-Ti+TiFe) eutectic structure. The hardness of the titanium cladding layer is 2-3 times greater than that of commercial pure titanium. When the interlayer titanium content is 5.5wt%

the bonding intensity between the titanium cladding layer and the interlayer is 14 MPa as a maximum. The difference of shear strength in the sandwich plate mainly relies on crystal dimensions and the shear fracture is intergranular brittle fracture. The research results provide significant theoretical and experimental basis for laser cladding preparation of titanium/steel sandwich plate.

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references

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