公开(公告)号：KR100117959B1

公开(公告)日：1997-07-09

申请号：KR1019940008947

申请日：1994-04-27

Applicant: 한국과학기술연구원

Inventor： 심재동 ,  조영환 ,  하헌필

IPC: A47J36/24

公开(公告)号：KR1019920007932B1

公开(公告)日：1992-09-19

申请号：KR1019900007329

申请日：1990-05-22

Applicant: 한국과학기술연구원

Inventor： 심재동 ,  변지영

IPC: C22C1/00

Abstract: This alloy is manufactured by (1) pre-manufacturing rare earth- iron alloy bath, which has more content of iron than rare earth- iron alloy to be made, from rare earth fluoride at the bottom of iron made crucible by direct alloying method, (2) mixing iron powder, rare earth oxide, calcium chloride, and metallic calcium, which is excess amount of 25-30 wt.% than theoretical amount of rare earth oxide nessary to reduce, (3) charging and melt heating the above mixture at 950-1,050 deg.C, (4) agitating it firstly at 450-600 rpm for 2 hrs., then secondly at 50-70 rpm for 1 hr., (5) dissolving the above mixture in the rare earth-iron oxide bath reduced by the metallic calcium. In (2), the mixture is mixed to make the amount of calcium chloride 5-6.5 times than the amount of calcium oxide generated while reducing rare earth oxide compeletly.

Abstract translation: 该合金由（1）通过直接合金法在铁制坩埚底部的稀土氟化物预制造稀土 - 铁合金浴，其中铁含量比稀土 - 铁合金含量多， （2）混合铁粉，稀土氧化物，氯化钙和金属钙，超过理论量的稀土氧化物需要量超过25-30重量％以减少，（3）对上述混合物进行充填和熔融加热 在950-150℃，（4）首先以450-600rpm搅拌2小时，然后以50-70rpm搅拌1小时，（5）将上述混合物溶解在稀土 - 氧化铁 浴被金属钙还原。 在（2）中，将混合物混合，使氯化钙的量相当于在减少稀土氧化物的同时产生的氧化钙的量的5-6.5倍。

公开(公告)号：KR100038282B1

公开(公告)日：1990-12-13

申请号：KR1019860003936

申请日：1986-05-20

Applicant: 한국과학기술연구원

Inventor： 심재동 ,  현도민 ,  박찬수

IPC: C22B9/00

公开(公告)号：KR100032131B1

公开(公告)日：1990-03-12

申请号：KR1019860000381

申请日：1986-01-22

Applicant: 한국과학기술연구원

Inventor： 박찬수 ,  심재동 ,  현도빈

IPC: C22C38/02