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Diffusion carbide coating for distortion control
刊名：
Die Casting Engineer.
作者：
Steve Harper
Tohru Arai
刊号：
772B0003
ISSN：
0012-253X
出版年：
2000
年卷期：
2000, vol.44, no.2
页码：
84-85,87,89-90,92,94
分类号：
TG2
语种：
eng
文摘：
It seems to be commonly believed that high temperature coating processes cannot be applied to dimensionally tight products. This is not necessarily true. Punch makers in Japan have been making standard type punches for metal stamping with 0.00008 to 0.00012 in. (2 to 3 μm) tolerance in diameter and less than 0.0002 in. (5 μm) in bend for more than twenty years. The results of Example 1 and others suggest that die casting pins with similar tolerances can be made without difficulty by well-considered procedures. It cannot be expected to industrially realize similar tight tolerances for some large cores, especially with complicated shapes. However, the examples of actual applications shown in the previous paragraphs suggest that even relatively large cores can be successfully TRD coated, satisfying the required tolerance. Unfortunately, a number of factors relate to distortion problems, most of which are out of the die caster's specialty. It should be emphasized that to easily control all these factors, the die caster should keep in close contact with steel makers, heat treaters, tool makers and especially with the coaters if he wants to apply the high temperature coating process to tight toleranced molds. The extra effort will be worthwhile and shown through cost savings.
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