Title : Application in preparation of graphite copper alloy and solid hydrogen storage alloy by casting method
Abstract:
A new type of vacuum melting furnace for preparing multiple groups of element alloys has been developed, which has many functions of induction heating, casting heat treatment, electromagnetic separation, electromagnetic purification, electromagnetic stirring and mechanical mixing. Suitable for high-end copper alloy, aluminum alloy, titanium alloy, can prepare semiconductor materials such as Ca, Six, solid hydrogen storage alloy TiMn 2, LaNi5, Li-Mg-H, V60 and other alloys, has the function of rapid cooling to prepare amorphous alloy. The equipment has advantages in the preparation of melting and heat treatment of graphite lead-free copper and solid hydrogen storage alloy. The numerical simulation technology is adopted to make the graphite which is difficult to be wet evenly distributed in brass, and the heat treatment can be completed with the equipment after smelting, so as to realize the low-cost development of graphite lead-free copper. The study showed that graphite at 50Hz, 60A, 480s can be added to brass by casting. The addition of graphite with a small size facilitates the distribution of graphite in brass, which exists around the H and β phases. The added graphite exists in the brass in the core-shell structure, which is more beneficial to improve the graphite content with less than the size of the H phase. Improve the graphite content by refining the grain through electromagnetic stirring. Before cold rolling, the graphite is distributed in the matrix in thick and irregular long strips. After cold processing and heat treatment, the graphite is broken and the tissue is refined.
The solid hydrogen storage alloy TiMn2VFe is prepared by electromagnetic heat field melting furnace, which makes the alloy composition and organization, completes the heat treatment, improves the capacity of solid hydrogen storage alloy, and realizes the integrated preparation technology of melting / heat treatment of solid hydrogen storage alloy. The study showed that after 700?x3h heat treatment, the dendritic crystalline structure decreased, the white hydrogen storage area increased, and it was changed to BBC structure, and the hydrogen storage performance was improved. The precipitation phase of low-cost hydrogen storage alloy TiMn2VFe is small and uniform in distribution, and the maximum hydrogen storage amount after heat treatment is 2.5 wt%, while the unheat treatment is 1.48 wt%. Key words: new melting furnace; electromagnetic thermal field; graphite lead-free copper; solid hydrogen storage alloy
