LAMINATION MOLDING APPARATUS AND METHOD FOR PRODUCING LAMINATION MOLDED OBJECT

To provide a lamination molding apparatus and a method for producing a lamination molded object.SOLUTION: Provided is a lamination molding apparatus comprising: a chamber covering a molding region; a material layer formation device for forming a material layer every divided layers obtained by dividing a desired three-dimensional molded object to the molding region by a prescribed height; an irradiation device for irradiating the prescribed irradiation region of each material layer with a laser beam or an electron beam and performing sintering or melting to form a solidified layer; and a temperature adjustment device which, every time one or a plurality of solidified layers are newly formed, subjects an upper face layer(s) as the newly formed solidified layer(s) at least among the solidified layer(s), to temperature adjustment in the order of the first temperature, the second temperature and the first temperature, and, provided that the first temperature is defined as T1, the second temperature is defined as T2, the martensite transformation starting temperature of the solidified layer(s) is defined as Ms, and the transformation completion temperature thereof is defined as Mf, all of the relations in the following inequalities (1) to (3) are satisfied: T1≥Mf(1), T1>T2(2) and T2≤Ms (3).SELECTED DRAWING: Figure 10 【課題】造形物の残留応力を制御することで、造形物の変形を抑制可能な積層造形装置および積層造形物の製造方法を提供する。【解決手段】造形領域を覆うチャンバと、造形領域に対して所望の三次元造形物を所定高さで分割してなる複数の分割層毎に材料層を形成する材料層形成装置と、材料層の所定の照射領域にレーザ光または電子ビームを照射して焼結または溶融させ固化層を形成する照射装置と、１層または複数層の固化層が新たに形成される毎に、固化層のうち少なくとも新たに形成された固化層である上面層を第１温度、第２温度、第１温度の順番で温度調整する温度調整装置とを備え、第１温度をＴ１、第２温度をＴ２、固化層のマルテンサイト変態開始温度をＭｓ、変態終了温度をＭｆとすると、下記式（１）から（３）の関係が全て満たされる積層造形装置が提供される。Ｔ１≧Ｍｆ （１）Ｔ１＞Ｔ２ （２）Ｔ２≦Ｍｓ （３）【選択図】図１０