| 摘要 |
PURPOSE:To make the heat treatment after the finishing of the machining unrequired and to lower the cost, by forming a plate with a base and a surface material integrated, heat-treating previously the plate, and then effecting the wire cut electrospark machining. CONSTITUTION:The thin surface material (B) of a special steel, an alloy tool steel, a cemented carbide, or the like is provided integrally on the surface of the base (A) of an ordinary structural steel (e.g. SS, SNS or SCM stipulated in JIS) or the like by friction welding or other means to form a plate (C). The plate (C) is heat-treated. A start point (D) is drilled, and cutting is effected according to the program to obtain a machined plate product having a desired configuration. |
