I need to describe the manufacturing of japanese knives. I struggle with the step when the steel blade is put together with the wooden handle. Here are some pictures from the video https://www.youtube.com/watch?v=j2L_Ku47afo (at 6'42"):
After putting the hot blade inside the handle, you can see that the steel immediately cools down and after hitting the handle with a hammer, the two pieces are merged. I've been told that the welding could not function between two different materials, especially not wood. Could you please explain me how those two materials merge together in this situation please ?
Thanks in advance for your answers !
- Sorry if this doesn't seem directly related to chemistry, I was more interested of what happened in the molecular scale than the physic reactions, if you think about a better forum to ask this do not hesitate to tell it to me;
- For those who can't see the picture or the video, the blacksmith has made a very long, thin end to the steel blade which he has warmed up until it becomes orange and then he puts it inside the wooden handle (which has a drilled hole). After he did this you can see smoke going out the handle, and finally the blacksmith hits the handle with a hammer (in the direction of the length).