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MATERIAL FOR Fe-Ni SERIES LEAD FRAME EXCELLENT IN PUNCHING WORKABILITY, Fe-Ni SERIES PRESS-PUNCHED ARTICLE AND METHOD FOR PUNCHING Fe-Ni SERIES MATERIAL
MATERIAL FOR Fe-Ni SERIES LEAD FRAME EXCELLENT IN PUNCHING WORKABILITY, Fe-Ni SERIES PRESS-PUNCHED ARTICLE AND METHOD FOR PUNCHING Fe-Ni SERIES MATERIAL
PROBLEM TO BE SOLVED: To improve the uniformity of the broken section in a material at the time punching by controlling the size of inclusions contained in the material to a specified ratio to the sheet thickness of the material. ;SOLUTION: This is the material for a lead frame contg., by weight, 30 to 50% Ni, and, in the case the sheet thickness of the material is defined as (t), the size of inclusions is controlled to ≤0.07 t. Since the clearance at the time of punching a lead frame by a press is generally set to 0.07 t at the maximum, the inclusions can pass through the clearance for the most part, so that the linearity of the boundary between the sheared section and the broken section can be obtd. Moreover, in the case MnS of 0.2 to 3 μm grain size contributing to its free-cuttability even among the inclusions in the ratio of 1,000 to 60,000 pieces/mm2, breaking uniformly occurs in all faces. The preferable componential compsn. of the material is composed of, by weight, 0.003 to 0.02% C, 0.05 to 1.0% Si, 0.1 to 1.5% Mn, 30 to 50% Ni, 0.0005 to 0.02% S, 0.001 to 0.02% N, and the balance Fe with inevitable impurities.;COPYRIGHT: (C)2000,JPO
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机译：解决的问题：通过控制材料中所含夹杂物的大小，使其与材料的板材厚度成特定比例，来提高打孔时材料中断面的均匀性。 ;解决方案：这是一种引线框材料，按重量计包含30％至50％的镍，并且在材料的板厚定义为（t）的情况下，夹杂物的尺寸应控制在≤0.07 t。由于通过冲压机冲压引线框时的间隙通常最大设为0.07t，因此夹杂物大部分可以通过该间隙，因此剪切部与断口之间的边界呈线性。可以忽略。另外，即使以1000〜60,000个/ mm 2的比例含有0.2〜3μm的MnS，也有助于其易切削性，在所有面均一地发生断裂。首选的组件compn。所述材料的重量百分比为0.003至0.02％C，0.05至1.0％Si，0.1至1.5％Mn，30至50％Ni，0.0005至0.02％S，0.001至0.02％N和余量的Fe不可避免的杂质。;版权所有：（C）2000，JPO
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