Effect of forming angle on the central quality of 21-4N valves by cross wedge rolling
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摘要: 基于氣門二次楔軋制原理,采用DEFORM-3D有限元軟件研究了成形角改變時軋件心部應力和應變的變化規律,分析了成形角對楔橫軋21-4N合金鋼氣門心部質量的影響.結果表明:隨著成形角的增大,軋件心部的應力狀態和應變狀態更為合理,有利于防止心部疏松.相應的軋制實驗結果驗證了這個結果.Abstract: Based on the mechanism of twice wedge rolling for valves, changes in stress and strain of a 21-4N valve at the center with forming angle were investigated using the finite element software DEFORM-3D. The effect of forming angle on the central quality of the rolled piece was analyzed. It is found that a larger forming angle can lead to a more reasonable distribution of both stress and strain in the center of the rolled piece, which is positive to prevent central cavities. Laboratory experiments show the same result.
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Key words:
- cross wedge rolling /
- alloy steel /
- valves /
- forming angle /
- quality control
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