JP2005240160A5

JP2005240160A5 -

Info

Publication number: JP2005240160A5
Application number: JP2004055021A
Authority: JP
Filing date: 2004-02-27
Publication date: 2006-08-24
Anticipated expiration: 2024-02-27

Description

ＨＩＰ法は、焼結素材を加圧容器に充填して、プレス圧力を付加する必要があるため、焼結素材である原料粉末を加圧容器に、高充填率で均一な充填を行う必要がある。そこで、プレス圧力を充填した原料粉末に与える方法が提案されている（例えば、特許文献１および２参照）
特開２００２−１６７６６９号公報特開２００３−３４２７２０号公報 In the HIP method, it is necessary to fill the sintered material in a pressurized container and apply a press pressure. Therefore, it is necessary to uniformly charge the raw material powder, which is a sintered material, into the pressurized container at a high filling rate. is there. Then, the method of giving to the raw material powder with which press pressure was filled is proposed (for example, refer patent document 1 and 2).
JP 2002-167669 A JP 2003-342720 A

本発明の実施例について以下に説明する。
平均粒径１２μｍのＭｏ粉末、Ｗ粉末、平均粒径１００μｍのＮｂ粉末、Ｔｉ粉末、Ｚｒ粉末を準備した。表１の試料Ｎｏ．１〜６に示すターゲット材を製造するために、Ｍｏ粉末および各添加元素の遷移金属粉末を所定の原子％比率で秤量後、Ｖ型混合機で１０分間混合して得られた原料粉末を冷間静水圧プレス（ＣＩＰ）で圧縮成形した圧密体を作製した。なお、ＣＩＰの圧力条件は２６５ＭＰａとした。前記圧密体をジョークラッシャーおよびディスクミルを使用して粉砕し二次粉末を作製した。その二次粉末を再度Ｖ型混合機で１０分間混合した後、内径寸法で厚さ１００ｍｍ×幅１０００ｍｍ×高さ１３００ｍｍの軟鋼製加圧容器に充填した。充填後、加圧容器の上蓋を溶接した後に４５０℃の温度下で真空脱気し、熱間静水圧プレス（ＨＩＰ）で加圧焼結した。ＨＩＰは、１２５０℃、１５０ＭＰａの条件下で５時間保持した。ＨＩＰ後の焼結体を切断および機械加工して、厚さ６ｍｍ×幅８１０ｍｍ×長さ９５０ｍｍのターゲット材を６枚得た。なお、二次粉末の加圧容器への充填密度を測定し表１に示した。また、上記の圧密体、焼結体から試験片を採取し、アルキメデス法により、相対密度を測定し表１に示す。
Examples of the present invention will be described below.
Mo powder, W powder having an average particle diameter of 12 μm, Nb powder having an average particle diameter of 100 μm, Ti powder , and Zr powder were prepared. Sample No. in Table 1 In order to produce the target materials shown in 1 to 6, Mo powder and transition metal powders of each additive element were weighed at a predetermined atomic% ratio, and then the raw material powder obtained by mixing for 10 minutes with a V-type mixer was cooled. A compacted body compression-molded with an isostatic press (CIP) was produced. The CIP pressure condition was 265 MPa. The compacted body was pulverized using a jaw crusher and a disk mill to produce a secondary powder. The secondary powder was again mixed with a V-type mixer for 10 minutes, and then filled into a pressure vessel made of mild steel having an inner diameter of 100 mm thick × 1000 mm wide × 1300 mm high. After filling, the upper lid of the pressurized container was welded, vacuum degassed at a temperature of 450 ° C., and pressure sintered by hot isostatic pressing (HIP). HIP was held for 5 hours under the conditions of 1250 ° C. and 150 MPa. The sintered body after HIP was cut and machined to obtain six target materials having a thickness of 6 mm × width of 810 mm × length of 950 mm. The packing density of the secondary powder into the pressurized container was measured and shown in Table 1. Further, test pieces were collected from the above compacted body and sintered body, and the relative density was measured by Archimedes method and shown in Table 1.