Why the tempering does not bring the impact properties up at the thinner section?
Using slow quench method may not be good, as the thick position still need a high strength.
Can you give me an example of how thinner sction can be insulated?
Many thanks
the tests were carried out at -30C, required 40J, but get 22J,25J,28J. It seems not far.
In the thick positions results are so good as: 200J, 204J, and 218J.
I have some engineering componments made of low carbon low alloy steels (0.13%C,0.25Si, 1.1Mn,0.6Ni,0.15Cr)
The materials are cutted from forged bar and machined into different size and shape. This is followed by heat treatments of normalising, austenlising(940C), water quenching and tempering...