公开(公告)号：US08297179B2

公开(公告)日：2012-10-30

申请号：US12303178

申请日：2007-02-13

申请人： Gunter Bürkle ,  Christian Schaller

发明人： Gunter Bürkle ,  Christian Schaller

IPC分类号： F16J1/04 ,  B23P15/10

CPC分类号： C21D1/09 ,  B23K26/60 ,  C21D9/0068 ,  C21D2221/00 ,  Y10T29/49265

摘要： A process for hardening an annular groove of a piston head of a piston of an internal combustion engine by means of laser beams, in which, at least the annular groove to be hardened is provided before or directly during the hardening process with a coating which absorbs the energy of laser beams. The coating is subsequently irradiated by the laser beams. The absorbing layer can be a manganese phosphate coating or is formed in situ by treating the component surface with a process gas comprising oxygen and inert gas. Furthermore, the laser beams are directed at the piston during hardening at an oblique angle to the direction of rotation. The advantages achieved are avoidance of reflections and undesirable hardening of the bottom of the groove, an increased degree of absorption and reduced distortion of the piston.

摘要翻译： 一种用于通过激光束对内燃机的活塞的活塞头的环形槽进行硬化的工艺，其中至少要硬化的环形槽在硬化过程之前或之前直接设置在吸收 激光束的能量。 涂层随后被激光束照射。 吸收层可以是磷酸锰涂层，或者是通过用包含氧气和惰性气体的工艺气体处理组分表面而原位形成的。 此外，激光束在与旋转方向成倾斜角度的硬化期间被引导到活塞。 所获得的优点是避免了凹槽底部的反射和不期望的硬化，增加了吸收的程度并减小了活塞的变形。

公开(公告)号：US20090255113A1

公开(公告)日：2009-10-15

申请号：US12303178

申请日：2007-02-13

申请人： Gunter Bürkle ,  Christian Schaller

发明人： Gunter Bürkle ,  Christian Schaller

IPC分类号： B23P15/06 ,  B23K26/00 ,  B05D3/06

CPC分类号： C21D1/09 ,  B23K26/60 ,  C21D9/0068 ,  C21D2221/00 ,  Y10T29/49265

摘要： The invention relates to a process for hardening an annular groove of a piston head (1) of a steel piston of an internal combustion engine by means of laser beams (4), in which, according to the invention, at least the annular groove to be hardened is provided before or directly during hardening with a coating which absorbs the energy of laser beams (4) and the coating is subsequently irradiated with the laser beams (4). The absorbing layer is preferably a manganese phosphate coating or is formed in situ by treating the component surface with a process gas comprising oxygen and inert gas. Furthermore, the laser beams are directed at the piston during hardening at an oblique angle to the direction of rotation. The advantages achieved are: avoidance of reflections and undesirable hardening of the bottom of the rotation. The advantages achieved are: avoidance of reflection and undesirable hardening of the bottom of the groove, an increased degree of absorption and reduced distortion of the piston.

摘要翻译： 本发明涉及一种用于通过激光束（4）硬化内燃机的钢活塞的活塞头（1）的环形槽的方法，其中根据本发明，至少将环形槽 在硬化之前或直接硬化时，用吸收激光束（4）的能量的涂层提供硬化，随后用激光束（4）照射涂层。 吸收层优选为磷酸锰涂层，或通过用包括氧气和惰性气体的工艺气体处理组分表面而原位形成。 此外，激光束在与旋转方向成倾斜角度的硬化期间被引导到活塞。 实现的优点是：避免反射和不必要的旋转底部硬化。 实现的优点是：避免反射和凹槽底部的不期望的硬化，增加吸收程度和减小活塞的变形。