Yoon Ken-Young, Kim Sang-Wook, Kim Jong-Kyun, Jung Taek-Kyun, Lim Seong-Sik, Hyun Soong-Keun
Department of Materials Science and Engineering, Inha University, Incheon 22212, Republic of Korea.
Metal Forming R&D Group, Korea Institute of industrial Technology, Incheon 21999, Republic of Korea.
J Nanosci Nanotechnol. 2021 Mar 1;21(3):2051-2054. doi: 10.1166/jnn.2021.18943.
In this study, the characteristics of commercially pure titanium (hereinafter referred as CP-Ti)/Steel joints, brazed with Zr-Ti-Ni amorphous filler metal were analyzed. The effects of brazing temperature and time on the microstructure and joining strength of the CP-Ti/Steel joints were investigated. It was observed that Ti diffused into stainless steel substrate formed a brittle reaction zone, which contained intermetallic compounds, such as τ (TiCrFe), (Fe, -Ni)Ti, and FeTi, observed at the joint interface. As the brazing temperature and time increased, the width of the reaction layer in the joint was observed to increase. To suppress the oxidation of the substrates, the experiment was conducted at a cooling and heating speed of 100 °C/min, under a vacuum of 5×10 torr. The joining strength was observed to be significantly affected by the brazing conditions, such as temperature and duration time. The shear strength test showed that the strength increased for 15 min and then sharply decreased. This was attributed to the formation of brittle intermetallic compounds, like (Fe, Ni)Ti. The joint brazed at 880 °C for 15 min showed the maximum joining strength, of 216 MPa.
在本研究中，分析了用Zr-Ti-Ni非晶态填充金属钎焊的工业纯钛（以下简称CP-Ti）/钢接头的特性。研究了钎焊温度和时间对CP-Ti/钢接头微观结构和连接强度的影响。观察到Ti扩散到不锈钢基体中形成了一个脆性反应区，在接头界面处观察到该反应区含有金属间化合物，如τ（TiCrFe）、（Fe，-Ni）Ti和FeTi。随着钎焊温度和时间的增加，接头中反应层的宽度增加。为了抑制基体的氧化，实验在5×10托的真空下，以100℃/分钟的冷却和加热速度进行。观察到连接强度受到钎焊条件（如温度和持续时间）的显著影响。剪切强度测试表明，强度在15分钟时增加，然后急剧下降。这归因于脆性金属间化合物（如（Fe，Ni）Ti）的形成。在880℃下钎焊15分钟的接头显示出最大连接强度，为216MPa。
