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| EFFECT OF INGOT HYDROGEN OR TRACE Pb CONTENTS ON TENSILE DUCTILITY OF ALLOY GH132 |
| Fu Jie; Xu Zhichao; Yu Yongsi; Zhao Wenxiang; Gao Liang (Beijing University of Iron and Steel Technology); Li Shunlai (Daye Steel Works) |
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Cite this article:
Fu Jie; Xu Zhichao; Yu Yongsi; Zhao Wenxiang; Gao Liang (Beijing University of Iron and Steel Technology); Li Shunlai (Daye Steel Works). EFFECT OF INGOT HYDROGEN OR TRACE Pb CONTENTS ON TENSILE DUCTILITY OF ALLOY GH132. Acta Metall Sin, 1982, 18(6): 651-660.
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Abstract The effect of the hydrogen content in the ingot on the medium temperature tensile ductility of an alloy GH132 has been investigated. Various hydrogen contents in thee ingots were produced by maintaining the equilibrium on different pressures of hydrogen input in a vacuum induction furnace and the alloy melts before casting. The results show that no matter what the original hydrogen contents, e. g. 2.0 to 19.6 ml/100 g, of the ingots are, neither marked difference to the ductility between high and low hydrogen containing ingots nor low tensile ductility region under medium temperature is found if the ingots are dehydrogenated to such extent of similar hydrogen content about 0.5 ml/100 g.The influence of trace Pb on medium temperature tensile ductility of the alloy has also been studied. Serious ductility deterioration was found and low tensile ductility region under medium temperature was obtained when Pb exceeded 2 ppm. This harmfulness may be explained by the diminishment of the granular strength and the equi-strength temperature of GH132.
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Received: 18 June 1982
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