レーザ焼入れにおけるビームプロファイルの影響(汎用コードABAQUSを用いた有限要素解析による検討)

概要

論文の詳細を見る
A computational system using the general-purpose code code ABAQUS for laser transformation hardening was developed through finite-element method analysis. In this system the temperature history of the laser-irradiated area was calculated and then compared to a TTA (time-temperature-austenitization) diagram. The elements for which temperature histories were sufficient to produce austenitization and martensitization were taken as the hardened zone. Circular beams with three typical kinds of laser beam profile and rectangular beams with three various intensity distributions were considered in the model because the laser beam profile has a critical influence on laser processing characteristics. When circular beams were used, a ring-mode beam was found to be better than a multi-mode or single-mode beam from the standpoint of obtaining the widest hardened zone. In obtaining the widest and deepest hardened zone a rectangular beam having a peak in the rear part was found more effective than a homogeneous beam. On the basis of these results, it is suggested that the temperature history of the laser-irradiated area can be controlled by the variation of intensity distribution.
一般社団法人日本機械学会の論文
1992-12-25