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公开(公告)号：KR102206764B1
公开(公告)日：2021-01-25
申请号：KR1020190060237
申请日：2019-05-22
Applicant: 포항공과대학교 산학협력단 , 국방과학연구소
Abstract: 본발명은금속소재가가지고있는 (001) 집합조직을제어하는전단변형공정조건을다결정소성모델을통해최적화하는것에대한방법론에관한것이다. 본방법은 (a) 가공전 금속소재의집합조직을분석하는단계, (b) 다결정소성모델(Visco-plastic self-consistent, VPSC)을이용하여소성가공공정의특정조건하에서생성되는집합조직을모사하는단계, (c) 상기소성가공공정을진행한금속소재의미세조직및 방위분포함수를분석하여, (001) 집합조직의분율을 (b) 단계에서예측한집합조직의분율과비교하는단계및 (d) 상기소성가공공정을거치지않은금속소재의집합조직분포와상기소성가공공정을수행한금속소재의집합조직분포를이용하여, 다결정소성모델로압연공정을거친압연재의최종적인집합조직을분석하는단계를포함하여, 상기단계를통해금속소재에결함을가하지않음과동시에 (001) 집합조직을제어할수 있는충분한전단변형을유발하는공정조건최적화를이룰수 있다.
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公开(公告)号：KR101477077B1
公开(公告)日：2014-12-29
申请号：KR1020140055408
申请日：2014-05-09
Applicant: 국방과학연구소
IPC: B23K1/00 , B23K1/19 , B23K35/363
Abstract: The present invention relates to a method for brazing heterogeneous molybdenum and titanium alloys. The present invention includes (a) a first heating step in which an Ag-Cu-based filler metal is arranged at a bonding portion of the molybdenum and titanium alloys, heating is performed up to 25°C to 100°C under the melting point of the Ag-Cu-based filler metal, and the state is maintained for a predetermined period of time; (b) a secondary heating step in which heating is performed up to 25°C to 100°C over the melting point of the Ag-Cu-based filler metal in the first heating step and the state is maintained for a predetermined period of time; and (c) a cooling step in which the Ag-Cu-based filler metal is cooled. According to the present invention, the melting point is much lower than the phase transformation temperature of Ti and Ti wettability is excellent, and thus no phase transformation is caused in the Ti alloy and sound brazing bonding is possible.
Abstract translation: 本发明涉及一种钎焊异种钼和钛合金的方法。 本发明包括（a）第一加热步骤，其中在钼和钛合金的接合部分处布置Ag-Cu基填料，在熔点下加热至25℃至100℃ 的Ag-Cu基填充金属，并且将状态保持预定时间段; （b）第二加热步骤，其中在第一加热步骤中，在Ag-Cu基填充金属的熔点下进行至多25℃至100℃的加热，并且将状态保持预定时间段 ; 和（c）冷却Ag-Cu系填充金属的冷却工序。 根据本发明，熔点比Ti的相变温度低得多，Ti的润湿性优异，因此在Ti合金中不会发生相变，可以进行声焊接。
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公开(公告)号：KR1020200134591A
公开(公告)日：2020-12-02
申请号：KR1020190060237
申请日：2019-05-22
Applicant: 포항공과대학교 산학협력단 , 국방과학연구소
Abstract: 본발명은금속소재가가지고있는 (001) 집합조직을제어하는전단변형공정조건을다결정소성모델을통해최적화하는것에대한방법론에관한것이다. 본방법은 (a) 가공전 금속소재의집합조직을분석하는단계, (b) 다결정소성모델(Visco-plastic self-consistent, VPSC)을이용하여소성가공공정의특정조건하에서생성되는집합조직을모사하는단계, (c) 상기소성가공공정을진행한금속소재의미세조직및 방위분포함수를분석하여, (001) 집합조직의분율을 (b) 단계에서예측한집합조직의분율과비교하는단계및 (d) 상기소성가공공정을거치지않은금속소재의집합조직분포와상기소성가공공정을수행한금속소재의집합조직분포를이용하여, 다결정소성모델로압연공정을거친압연재의최종적인집합조직을분석하는단계를포함하여, 상기단계를통해금속소재에결함을가하지않음과동시에 (001) 집합조직을제어할수 있는충분한전단변형을유발하는공정조건최적화를이룰수 있다.
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