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1. 发明授权

KR100502193B1 고경도 코발트 미량함유 고속도공구강 및 그 제조방법 有权
标题翻译：具有优异硬度的高速工具钢及其制造方法
公开(公告)号：KR100502193B1
公开(公告)日：2005-07-20
申请号：KR1020020082644
申请日：2002-12-23
申请人： 철강융합신기술연구조합 , 재단법인 포항산업과학연구원 , 주식회사 세아창원특수강 , 주식회사 포스코
发明人： 정재영 , 박재철 , 마봉열
IPC分类号： C22C38/12
摘要： 본 발명은 절삭기계의 공구로 사용되는 고속도공구강 및 그 제조방법에 관한 것이다.
이 고속도공구강은 중량%로, C: 0.75~1.1%, Si: 0.1~1.0%, Mn: 0.5% 이하, Cr: 3.7~4.5%, Ni: 0.30% 이하, Co: 0.3~0.8%, Mo: 4.5~5.5%, W: 5.5~6.8%, V: 1.7~2.2%, Cu: 0.6% 이하, 나머지 Fe및 기타 불가피한 불순물로 조성된다. 또한, 이 고속도공구강의 제조방법 역시 제공된다.
이 고속도공구강은 M2 고속도공구강의 열간가공성을 가지면서 목표 경도치를 갖는다. 따라서, 선재 및 봉재의 생산이 용이하며, M2 고속도공구강의 품질이 향상된다.

2. 发明公开

KR1020030053709A 열간 자유단조 압하량 배분방법 有权
标题翻译：滚动减少分配方法在无铅锻造
公开(公告)号：KR1020030053709A
公开(公告)日：2003-07-02
申请号：KR1020010083657
申请日：2001-12-22
申请人： 재단법인 포항산업과학연구원 , 철강융합신기술연구조합 , 주식회사 세아창원특수강 , 주식회사 포스코
发明人： 천명식 , 박재철
IPC分类号： B21J5/00
摘要： PURPOSE: A rolling reduction distribution method in hot free forging is provided to increase pressing efficiency on pores generated during casting process in forging process and increase output by minimizing the number of passes using an appropriate rolling reduction distribution method. CONSTITUTION: The rolling reduction distribution method in hot free forging comprises first step of calculating allowable forging load of forging press from dimensions of square bar in the intermediate steel ingot step and target dimensions of the square bar; second step of determining first rolling reduction within the allowable conditions by obtaining deviation of the forging load and allowable forging load calculated in the first step and calculating difference between the maximum rolling reduction and minimum rolling reduction; third step of comparing the first rolling reduction determined in the second step with a reduction ratio having conditions for pressing pores to the maximum determined from a numerical expression for pore pressing ratio; fourth step of determining reduction ratio of the present pass by comparing the reduction ratio determined in the third step with a reduction ratio having allowable limit conditions for generating cracks during forging; fifth step of calculating output side thickness, width spreading, output side width and temperature of the next pass from the reduction ratio determined in the fourth step; and sixth step of repeating the first to fifth steps in calculating reduction ratio of the remaining next passes in the same manner.
摘要翻译：目的：提供热锻造中的轧制压下分配方法，以提高锻造过程中产生的孔隙的压制效率，并通过使用适当的轧制压下分布方法使通过量最小化来增加产量。构成：热自由锻造中的轧制压下分配方法包括在中间钢锭步长中的方棒尺寸和方棒的目标尺寸上计算锻压机的允许锻造载荷的第一步骤; 通过获得在第一步骤中计算的锻造载荷和允许锻造载荷的偏差以及计算最大轧制压下率和最小轧制压下量之差来确定允许条件下的第一轧制压下量的第二步骤; 将从第二步骤确定的第一次压下率与从孔隙压制比的数值表达式确定的压缩孔的压缩比达到最大值的第三步骤; 通过将在第三步骤中确定的减速比与锻造期间产生裂纹的允许极限条件的减速比进行比较来确定当前通过的减速比的第四步骤; 从第四步骤确定的压下率计算下一道次的输出侧厚度，宽度扩展，输出侧宽度和温度的第五步骤; 以及以相同的方式计算剩余的下一遍的减速比来重复第一至第五步骤的第六步骤。

3. 发明授权

KR100431598B1 열간 자유단조 패스 스케줄 도출방법 失效
标题翻译： 열간자유단조패스스케줄도출방
公开(公告)号：KR100431598B1
公开(公告)日：2004-05-17
申请号：KR1020010083658
申请日：2001-12-22
申请人： 재단법인 포항산업과학연구원 , 철강융합신기술연구조합 , 주식회사 세아창원특수강 , 주식회사 포스코
发明人： 김필호 , 박재철
IPC分类号： B21J5/00
摘要： PURPOSE: A method for deducing hot free forging pass schedule is provided to produce pass schedule having the minimum pass and minimum time when producing rolling pass schedule from initial rectangular workpiece to target rectangular workpiece. CONSTITUTION: The method comprises the steps of forging the billet to the maximum to target dimensions of thickness and width or less by the maximum available rolling reduction per pass found using bisectional search method of forging machine such as the maximum pass calculation part when forging billet into rectangular bar and wide bar; determining the maximum pass frequency and whether to rotate the bar or not by repeating the processes of forging width of the bar to a target width by rotating the rectangular bar per each pass in case of the rectangular bar and rotating the forged wide bar after forging the wide bar from initial thickness to a target thickness or less in case of wide bar, and performing thickness forging again in case that thickness of the bar is increased to the target thickness or more again by thickness deviation due to target width forging; and changing variation determining variable into positive if the final product is smaller than the target dimensions and changing variation determining variable into negative if the final product is larger than the target dimensions in case final product does not reach target dimensions after initiating rolling reduction of the total pass into an arbitrary small value, reducing revision of adjusting variable revision coefficient as the current repetition frequency approaches the maximum repetition frequency, and reducing revision of the already determined total pass as it goes to the later stage of pass.
摘要翻译：目的：提供一种用于推导热自由锻通行程时间表的方法，以产生当从最初的矩形工件到目标矩形工件产生轧通时间表时具有最小通过时间和最小时间的通过时间表。本发明的方法包括以下步骤：通过使用锻造机的二分搜索方法发现的最大可用的每道次轧制压下量，例如锻造钢坯时的最大合格计算部分，将坯料锻造到最大以达到厚度和宽度或更小的目标尺寸长方形酒吧和宽酒吧; 通过在矩形条的情况下通过每旋转一次矩形条重复锻造宽度至目标宽度的过程来确定最大通过频率以及是否旋转条，并且在锻造之后旋转锻造宽条在宽条的情况下从初始厚度到目标厚度以下的宽条或更少，并且在由于目标宽度锻造导致的厚度偏差使条的厚度增加到目标厚度或更多时再次执行厚度锻造; 并且如果最终产品小于目标尺寸，则将变化确定变量改变为正，并且如果最终产品在开始总量的压下之后最终产品没有达到目标尺寸时，如果最终产品大于目标尺寸则将变化确定变量改变为负传递到任意小的值，当当前重复频率接近最大重复频率时减少调整变量修正系数的修正，并且减少已经确定的总通过在修改到达后期通过时的修正。

4. 发明授权

KR100484091B1 열간 자유단조 압하량 배분방법 有权
标题翻译：用于在热自由锻造中分配方形棒的锻造方法
公开(公告)号：KR100484091B1
公开(公告)日：2005-04-20
申请号：KR1020010083657
申请日：2001-12-22
申请人： 재단법인 포항산업과학연구원 , 철강융합신기술연구조합 , 주식회사 세아창원특수강 , 주식회사 포스코
发明人： 천명식 , 박재철
IPC分类号： B21J5/00
摘要： 본 발명은 열간 자유 단조공정에 있어서 강괴 중간단계의 사각바공정에서 마무리 원형바 직전의 목표 사각바 공정까지 압하량을 배분하는 열간 자유단조 압하량 배분방법에 관한 것으로, 강괴 중간단계의 사각바 치수 및 목표 사각바 치수로부터 단조프레스의 허용 단조하중을 계산하는 제1단계와, 상기 단조하중과 허용 단조하중과의 편차를 구하고 최소, 최대 압하량간 차이를 계산하여 허용조건내의 1차 압하량을 결정하는 제2단계와, 상기 1차 압하량을 기공압착비 수식으로부터 기공압착을 최대로 하는 조건의 압하량을 결정하여 비교하는 제3단계와, 상기 압하량을 단조시 크랙발생 허용한계조건의 압하량과 비교하여 현재 패스의 압하량을 결정하는 제4단계와, 상기 압하량으로부터 차기패스 출측 두께, 폭퍼짐 량, 출측 폭, 온도를 계산하는 제5� �계로 구성되는 것을 특징으로 하는 열간 자유단조 압하량 배분방법을 제공하게 된다. 이와 같이, 본 발명은 강괴 내부의 기공을 최소로 할 수 있는 압하량을 도출함으로써 단조품의 품질향상 뿐만 아니라 적정 패스스케줄관리에 따른 단조횟수 감소로 생산성이 향상되는 효과가 있다.

5. 发明公开

KR1020040056100A 고경도 코발트 미량함유 고속도공구강 및 그 제조방법 有权
标题翻译：通过控制Co和Si的高硬度高速工具钢包含钴的跟踪及其制造方法
公开(公告)号：KR1020040056100A
公开(公告)日：2004-06-30
申请号：KR1020020082644
申请日：2002-12-23
申请人： 철강융합신기술연구조합 , 재단법인 포항산업과학연구원 , 주식회사 세아창원특수강 , 주식회사 포스코
发明人： 정재영 , 박재철 , 마봉열
IPC分类号： C22C38/12
摘要： PURPOSE: A high speed tool steel containing trace of cobalt is provided which controls hardness according to hardening temperature by controlling Co content and improves hardness by adding Si at the same time, and a method for manufacturing the same is provided. CONSTITUTION: The high hardness high speed tool steel containing trace of cobalt by controlling Co and Si contents comprises 0.75 to 1.1 wt.% of C, 0.1 to 1.0 wt.% of Si, 0.5 wt.% or less of Mn, 3.7 to 4.5 wt.% of Cr, 0.30 wt.% or less of Ni, 0.3 to 0.8 wt.% of Co, 4.5 to 5.5 wt.% of Mo, 5.5 to 6.8 wt.% of W, 1.7 to 2.2 wt.% of V, 0.6 wt.% or less of Cu and a balance of Fe and other inevitable impurities, wherein the high speed tool steel comprises 0.32 to 1.0 wt.% of Si, and wherein the high speed tool steel has 64 or more of Rockwell hardness. The method for manufacturing the high hardness high speed tool steel containing trace of cobalt by controlling Co and Si contents comprises the process of performing hot working on the homogenization treated steel slab by homogenization treating a steel slab comprising 0.75 to 1.1 wt.% of C, 0.1 to 1.0 wt.% of Si, 0.5 wt.% or less of Mn, 3.7 to 4.5 wt.% of Cr, 0.30 wt.% or less of Ni, 0.3 to 0.8 wt.% of Co, 4.5 to 5.5 wt.% of Mo, 5.5 to 6.8 wt.% of W, 1.7 to 2.2 wt.% of V, 0.6 wt.% or less of Cu and a balance of Fe and other inevitable impurities at a temperature of 1,100 to 1,150 deg.C.
摘要翻译：目的：提供含有痕量钴的高速工具钢，其通过控制Co含量来控制硬度，同时通过加入Si来提高硬度，并提供其制造方法。构成：通过控制Co和Si含量，含有痕量钴的高硬度高速工具钢包含C：0.75〜1.1％，Si：0.1〜1.0％，Mn：0.5％（重量）以下，3.7〜4.5 Cr的重量％，Ni的0.30重量％或更少，Co的0.3至0.8重量％，Mo的4.5至5.5重量％，W的5.5至6.8重量％，V的1.7至2.2重量％，0.6重量％以下的Cu和余量的Fe等不可避免的杂质，其中高速工具钢含有0.32〜1.0重量％的Si，其中高速工具钢的洛氏硬度为64以上。通过控制Co和Si含量来制造含有痕量钴的高硬度高速工具钢的方法包括对均质处理的钢板进行热处理，通过均化处理含有0.75-1.1重量％的C的钢坯， 0.1〜1.0重量％的Si，0.5重量％以下的Mn，3.7〜4.5重量％的Cr，0.30重量％以下的Ni，0.3〜0.8重量％的Co，4.5〜5.5重量％温度为1100〜1150℃，Mo为5.5〜6.8重量％，V为1.7〜2.2重量％，Cu为0.6重量％以下，余量由Fe和其他不可避免的杂质构成。

6. 发明公开

KR1020030053710A 열간 자유단조 패스 스케줄 도출방법 失效
标题翻译：用于减免无刷锻造时间表的方法
公开(公告)号：KR1020030053710A
公开(公告)日：2003-07-02
申请号：KR1020010083658
申请日：2001-12-22
申请人： 재단법인 포항산업과학연구원 , 철강융합신기술연구조합 , 주식회사 세아창원특수강 , 주식회사 포스코
发明人： 김필호 , 박재철
IPC分类号： B21J5/00
摘要： PURPOSE: A method for deducing hot free forging pass schedule is provided to produce pass schedule having the minimum pass and minimum time when producing rolling pass schedule from initial rectangular workpiece to target rectangular workpiece. CONSTITUTION: The method comprises the steps of forging the billet to the maximum to target dimensions of thickness and width or less by the maximum available rolling reduction per pass found using bisectional search method of forging machine such as the maximum pass calculation part when forging billet into rectangular bar and wide bar; determining the maximum pass frequency and whether to rotate the bar or not by repeating the processes of forging width of the bar to a target width by rotating the rectangular bar per each pass in case of the rectangular bar and rotating the forged wide bar after forging the wide bar from initial thickness to a target thickness or less in case of wide bar, and performing thickness forging again in case that thickness of the bar is increased to the target thickness or more again by thickness deviation due to target width forging; and changing variation determining variable into positive if the final product is smaller than the target dimensions and changing variation determining variable into negative if the final product is larger than the target dimensions in case final product does not reach target dimensions after initiating rolling reduction of the total pass into an arbitrary small value, reducing revision of adjusting variable revision coefficient as the current repetition frequency approaches the maximum repetition frequency, and reducing revision of the already determined total pass as it goes to the later stage of pass.
摘要翻译：目的：提供一种用于推导热自由锻造工艺流程的方法，以生产从初始矩形工件到目标矩形工件生产轧制过程时具有最小通过时间和最小时间的通过时间表。方法：该方法包括以下步骤：通过使用锻造机的二等分搜索方法（例如，当将坯料锻造成最大通过计算部分时）的最大通过计算部分，通过最大可用的轧制压下量将坯料锻造最大到目标尺寸的厚度和宽度矩形酒吧和宽酒吧; 通过在矩形棒的情况下，通过在每次通过中旋转矩形棒并且在锻造之后旋转锻造的宽棒来确定最大通过频率以及是否旋转棒，以通过将条的锻造宽度重复到目标宽度的过程在宽棒的情况下，从初始厚度到目标厚度或更小的宽条，并且在由于目标宽度锻造而由棒的厚度增加到目标厚度或更多再次由厚度偏差的情况下再次进行厚度锻造; 如果最终产品小于目标尺寸，则将变化确定变量变为正数，并且如果在最终产品没有达到目标尺寸之后最终产品大于目标尺寸，则变化变量确定变量变为负值传递到任意小的值，减少当前重复频率接近最大重复频率时调整可变修正系数的修正，并减少已经确定的总传递的修改，因为它到后期阶段。

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