| 摘要 |
PROBLEM TO BE SOLVED: To provide a brass-made angle valve by forging work which is superior in anticorrosion and moreover cutting property is superior in productivity. SOLUTION: This component member of a brass-made passage is manufactured via a first process preparing a brass material of 37 to 46 wt.% an apparent Zn content and 0.5 to 7.0 wt.% an Sn content, a second process formed with a hollow part by warm or hot forging this brass material, a third process for adjusting a cutting character and anticorrosion after cooling by controlling a cooling speed after the warm or hot forging, and a fourth process for making cutting work penetrate the hollow part.
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