1989 Fiscal Year Final Research Report Summary
The effect of the Physical Properties of Metal on the Explosive Welding Behavior
| Project/Area Number |
63460205
|
|---|
| Research Category |
Grant-in-Aid for General Scientific Research (B)
|
| Allocation Type | Single-year Grants |
|---|
| Research Field |
溶接工学
|
|---|
| Research Institution | EHIME UNIVERSITY |
|---|
Principal Investigator |
MURAKAMI Zen-ichi EHIME UNIVERSITY, PROFESSOR, 工学部, 教授 (10036212)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
NINAGUTI Katusi EHIME UNIVERSITY, ASSISTANT RESEARCHER, 工学部, 助手 (70108405)
NISIDA Minoru EHIME UNIVERSITY, LECTURESHIP, 工学部, 講師 (60036374)
|
|---|
| Project Period (FY) |
1988 – 1989
|
| Keywords | Initial Temperature / Hardness / Critical Explosive Load / Welded Area / Wave / Yield Strength / Tensile Strength |
|---|
| Research Abstract |
This report is concerned with the effect of the ability of plastic deformation of the metals to be explosive welded, such as the initial temperature and hardness of base metal on the explosive welding behavior .
The results are as follows; 1. The critical explosive load (Rc-),the minimum explosive load to be able to obtain 100% welded surface, is reduced with elevating the initial temperature of base metal to be welded.
2. The amplitude and length of the wave formed at welded interface is increased with elevating the initial temperature of base metal to be welded.
3. The critical explosive load increases with increasing the hardness of base metal and the relation between the Vickers hardness (H_v) and the critical explosive load(R_c) can be shown as follows. R_c = (7.35X10^<-7>H^2_ + 0.60)<plus-minus>0.08
4. The amplitude and length of the wave formed at welded interface is reduced with increasing of the base metal hardness The relation between the amplitude(M_A1) and length(M_L) of the wave and the reciprocal(R_H = 1/H_<VB>) of the sum of base metal Hardness(H_<VB>) and flyer metal hardness(H_<VF>) can be shown by the following equations. M_A = (25.8R_H-1.97X10^<-10>)<plus-minus>8.33X10^<-3> M_L = (56.3R_H-1.18X10^<-2>)<plus-minus>2.21X10^<-2>
5. The critical explosive load is increased with increasing the yield strength ( sigma_Y) and the tensile strength( sigma_T) of the base metal (JIS S45C tool steel) . The relation between these strengths and the critical explosive load are shown by the following equations. R^C = 1.38X10^<-7>sigma^2_+0.55, R_C = 1.90X10^<-7>sigma^2_+0.56
|
