The article presents the results of the computer simulation in the Solid Works using the method of finite elements. In the research described a computer model that was tested on experimental sample that was made of steel 30KHGSA. Data of thermal processes and residual stresses in a sample after laser processing were received during the research. Calculations of the depth of the hardened zones and the strength of the prototype were obtained during the simulation. The process of laser hardening a "Water jet engine sleeve" was simulated in the research. The results and conclusions obtained during this work are given in the conclusion.
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