5.4 Conclusion
163
Maximum Mach number
Maximum Mach number
Maximum Mach number
Time /ms
Time /ms
Time /ms
Fig. 5.13 Variation of peak Mach number with welding time under different welding speeds in
laser welding process
(3) A highly efficient numerical solution algorithm is proposed based on the
dynamic mathematical model of compressible vapor in the keyhole during
the deep penetration laser welding keyhole process established in this chapter;
the dynamic behavior of metal vapor in the keyhole for 304 stainless steel
welding is analyzed under the actual welding process conditions; the distribution non-uniformity, compressibility and high transient of metal vapor inside
the keyhole are analyzed; and local evaporation on the free surface of the
keyhole and continuous swinging of the vapor at the opening of the keyhole
are discussed.