Effects of precipitate particles on grain diameters and formability of 3003 alloy
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概要
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The effects of precipitate particles on grain diameters and formability of 3003 alloy sheets were studied.The dispersion degree of precipitate particles of the material was systematically changed by means of precipitation heat treatment after solution heat treatment at 630°C for 2 hrs.Limiting drawing ratio, conilcal cup value, and Erichsen cupping value were measured to evaluate the formability after primary recrystallization.Results obtained were summarized as follows:(1) The smallest grain diameters and the highest formability were obtained by high temperature precipitation treatments at 560°C for 10 hrs. and 530°C for 36 hrs. The dispersion degree of particles was smallest under these conditions.(2) Higher dispersion degree, lower formability, and larger grain diameters were obtained by precipitation treatments at lower temperatures than above.(3) The material, which had been subjected to no precipitation treatments, was likely to have the same properties as those of the material precipitated at lower temperatures.(4) Erichsen cupping value hardly depended upon the conditions of precipitation heat treatments.(5) In conclusion, large particles, still remaining after the solution heat treatment, were sparsely dispersed, and the supersaturated Mn in matrix was precipitated in the form of a small amount of fine particles. The material having such structures brought about small grain diameters and high formability. In case of such structures, the material had least (100) planes parallel to the sheet plane.
- 一般社団法人 軽金属学会の論文
一般社団法人 軽金属学会 | 論文
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