レーザ焼入は材料表面付近を加熱する手法です。DDLを用いたレーザ焼入では集光ビームサイズの選択により、非常に小さく狭い部分の焼き入れが可能となります。これにより歪みを少なく抑えることができ、高品質な焼き入れを実現します。
集光ビームパターンおよびプロファイル例
・DDL(トップハット形状)
・ファイバ出力型レーザ(ガウシアン形状)
焼入時の入熱イメージ画像
・DDL
・ファイバ出力型レーザ
従来工法である高周波焼入との比較表です。高周波焼入とは材料に高周波の電磁波による電磁誘導を起こし、表面を過熱させて焼き入れを行う熱処理の手法です。
レーザ焼入 | 高周波焼入 | |
---|---|---|
歪み | 小さい | 大きい |
後行程 | 不要 | 必要 |
冷却 | 不要 | 必要 |
コイル(治具) | 不要 | 製品ごとに専用品が必要 |
焼入深さ | 浅い | 深い |
加熱 | 局所 | 全体 |
焼入領域
・レーザ焼入
・高周波焼入
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