SINTERED PRODUCT AND LASER MARKING METHOD THEREFOR

• Main Authors: NAWACHI KENJI, TAUCHI MASAYUKI, TERAI HIROAKI
• Format: Patent
• Language: Chinese; English
• Published: 03.04.2020
• Subjects: ALLOYS; CASTING; CHEMISTRY; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; FERROUS OR NON-FERROUS ALLOYS; MACHINE TOOLS; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METALLURGY; PERFORMING OPERATIONS; POWDER METALLURGY; SOLDERING OR UNSOLDERING; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WELDING; WORKING BY LASER BEAM; WORKING METALLIC POWDER

A method according to one aspect of the present disclosure is a laser marking method for a compacted powder body that contains metal powder, the method comprising: a first step for irradiating a predetermined area on the surface of the compacted powder body with a laser beam having a lower first power, and melting and thereby smoothing the inside of the predetermined area; and a second step for forming dots, composed of recessed portions of a certain depth, at predetermined places in the predetermined area by means of a laser beam having a higher second power. 根据本公开的一个方面的方法为用于包含金属粉末的压粉成形体的激光标记方法，该方法包括：第一步骤，其中用具有较小的第一功率的激光束照射压粉成形体的表面上的预定区域，以使预定区域的内部熔融并平滑；以及第二步骤，其中利用具有较大的第二功率的激光束，以在预定区域的预定位置形成由特定深度的凹部形成的点。