Thermal deformation and stabilization process of an al-mg-mn-er-zr alloy plate

Abstract

The invention provides a thermal deformation and thermal deformation stabilizing technology of an Al-Mg-Mn-Er-Zr alloy plate, and belongs to the field of non-ferrous metal alloy. The technology comprises the steps that double-stage homogenizing thermal treatment is conducted on a cast ingot, then hot rolling is conducted, the hot rolling technology is characterized in that heating is conducted atthe temperature ranging from 250 DEG C to 350 DEG C, pass deformation is conducted, the rolling speed ranges from 0.1 ms<-1> to 0.3 ms<-1>, wherein the cast ingot comprises 5.5%-6.5% of Mg, 0.7%-1.1%of Mn, 0.1%-0.3% of Er, 0.02%-0.12% of Zr, smaller than 0.4 of Fe, smaller than 0.4 of Si, smaller than 0.1 of Cu, smaller than 0.2 of Zn and the balance Al and impurities; and stabilizing annealing is conducted on an obtained hot-rolled plate for 4-48 hours at the temperature ranging from 240 DEG C to 300 DEG C. Alloy obtained through the thermal deformation and thermal deformation stabilizing technology has the advantages of being high in strength, high in long-term corrosion resistance and high in long-time mechanical stability.

Description

technical field [0001] The invention relates to a thermal deformation of an Al-Mg-Mn-Er-Zr alloy plate and a stabilization process thereof, belonging to the technical field of non-ferrous metal alloys. [0002] technical background [0003] 5xxx series aluminum alloys are widely used in transportation and transportation due to their good corrosion resistance. With the development of economy, people put forward higher requirements for the strength of aluminum alloys. However, this alloy cannot be strengthened by heat treatment, and the comprehensive performance of this alloy is mainly improved by means of solid solution strengthening, work hardening and microalloying, and the use state is cold deformation or annealed state. Increasing the content of Mg can increase the strength of aluminum alloy; by adding Er, Zr and other elements to combine with the matrix to form dispersed high temperature resistant second phase particles, the strength and recrystallization temperature of t...

AI Technical Summary

Problems solved by technology

The traditional cold rolling plus stabilization process is cumbersome, and the elongation rate has decreased, and defects such as cracks are prone to appear during cold rolling, while the traditional hot rolling process does not significantly improve the strength of the material, and there is no long-term corrosion resistance of the test material performance

Therefore, through microalloying, the matrix precipitates fine dispersed phases, and then by controlling the rolling temperature and rolling speed, combined with the stabilization annealing process, more subgrain structures can be formed inside the material, thereby obtaining yield strength and elongation. And Er-containing high-magnesium aluminum alloy plates with good long-term corrosion resistance. At present, there are few domestic introductions to the thermal deformation and stabilization annealing process of Er-containing high-magnesium aluminum alloy plates.

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