摘要:In this paper, the abnormal state (the raising of the flow stress) , which appears in the process of the die cavity being formed by use of through Zn-Al super-plasticity alloy, has been studied from origined structure. Rusults show that, there are abnormal net structure. Authors have tried to find a suitable heat treatment method to eliminate it, and made compared tests at isothermal compression for the samples before and after elimination of the net structure.
摘要:In this paper, the technics of refining and modification with argon and complex flux for aluminium alloys and the perimental results are presented. The results obtained show that the new technics is effective and suitable.
摘要:The Breakdown of large complex cylinder head core is close related to the hot strength-Toughness propertiesof precoated phenolic resin sand during the drawing of patterns. In this paper, more efficient measuring method of evaluating the hot strength-toughness properties was introduced; main factors which influence on the hot strength-toughness properties was studied; some ways improving the hot strength-toughness properties was presented and the good results was obtained in production practice.
摘要:In this paper, it were discussed that some questions in the graphite mould design of the compLicated high-speed titanium alloy guide Pullty, and that taken some measures for preventing gas hole defacts in the graphite mould casting. The kinds of the titanium alloy components suited to the graphite mould casting have been increased.
摘要:This article presents the chemical composition, various raw materials and melting temperature of the Brass with low copper, the effects of the modification on mechanical properties of Al-Si Alloys and related technological parameters. The effects of the production and application of the Brass with low copper on reducing cost and saving copper material are included.