10. Conclusion

We can make the following assessment:

• aluminothermic welding has a number of weaknesses compared with electric welding;

• forging the weld could eliminate the harmful effect of the basaltic structure;

• the weld could be refined by vibration (perrier process in steel ingots) with a frequency of 10 Hz (figure 15 ) during solidification . This figure shows the range of vibration amplitudes and frequencies suitable for different metals. With regard to the new...