CALCULATION OF THE NONSTATIONARY, NONLINEAR THREE-DIMENSIONAL PROBLEM OF HEAT CONDUCTION BY THE FINITE-ELEMENT METHOD IN CONTINUOUS LASER HEATINGE. I. Degtyarev UDC 536.2 The process of nonstationary high-intensity laser surface heating of a three-dimensional body in the shape of a rectangular parallelepiped by a continuous laser with a normal distribution of the power density in the heating spot has been investigated numerically with the finite-element method. Consideration has been given to the process of formation of the heat-affected zone and its geometry. Thermal cycles of zonal points and their characteristics have been investigated. N. E. Bauman Moscow State Technical University, Moscow, Russia; email: email@example.com. Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 76, No. 6, pp. 156-160, November-December, 2003. Original article submitted September 17, 2002; revision submitted March 24, 2003.