公开(公告)号：KR1020020054533A

公开(公告)日：2002-07-08

申请号：KR1020000083654

申请日：2000-12-28

Applicant: 현대자동차주식회사

Inventor： 정승철

IPC: C21D5/00

CPC classification number: Y02P10/212

Abstract: PURPOSE: A heat treatment for removing residual stress of cast iron is provided, which can remove residual stress up to 80%, thus improve mechanical durability of components. CONSTITUTION: The heat treatment of the present invention is characterized in that cast iron is heated from 250°C to the temperature range of 560 to 580°C at the rate of 40°C to 60°C/h and then cooled to the temperature range of 300°C to 350°C at the rate of 20°C to 50°C followed by air cooling.

Abstract translation: 目的：提供去除铸铁残余应力的热处理，可以将残余应力消除80％，从而提高部件的机械耐久性。 构成：本发明的热处理的特征在于，以40℃〜60℃/ h的速度将铸铁从250℃加热至560〜580℃的温度范围，然后冷却至温度 范围为300℃至350℃，以20℃至50℃的速率，然后空气冷却。

公开(公告)号：KR1020010066190A

公开(公告)日：2001-07-11

申请号：KR1019990067778

申请日：1999-12-31

Applicant: 현대자동차주식회사

Inventor： 정승철

IPC: C22C38/18

Abstract: PURPOSE: A process for preparing the titled carbon steel by containing iron as a main ingredient, C, Si, Mn, P, S, Cr, Al, B, Ti, Bi and Mo and quenching after forging without heat treating process is provided, which increases strength and toughness and reduces the cost of production. CONSTITUTION: Steel containing iron as a main ingredient, 0.10 to 0.15% by weight of C, below 0.30% by weight of Si, 1.0 to 2.5% by weight of Mn, below 0.015% by weight of P, below 0.035% by weight of S, below 1.0 to 2.5% by weight of Cr, 0.020 to 0.030% by weight of Al, 0.00001 to 0.00003% by weight of B, 0.010 to 0.030% by weight of Ti, 0.05 to 0.10% by weight of Bi and 0.1 to 0.3% by weight of Mo is quenched after forging without passing through a heat treating process to produce the titled martensite-based carbon steel.

Abstract translation: 目的：提供以铁为主要成分，C，Si，Mn，P，S，Cr，Al，B，Ti，Bi和Mo制备标准碳钢的方法，并且在没有热处理工艺的锻造之后淬火， 这增加了强度和韧性，降低了生产成本。 构成：以铁为主成分，0.10〜0.15重量％的C，低于0.30重量％的Si，1.0〜2.5重量％的Mn，低于0.015重量％的P，低于0.035重量％ S，1.0〜2.5重量％的Cr，0.020〜0.030重量％的Al，0.00001〜0.00003重量％的B，0.010〜0.030重量％的Ti，0.05〜0.10重量％的Bi，0.1〜 0.3重量％的Mo在锻造后淬火而不通过热处理工艺以制备标题为马氏体的碳钢。

公开(公告)号：KR1020010056706A

公开(公告)日：2001-07-04

申请号：KR1019990058287

申请日：1999-12-16

Applicant: 현대자동차주식회사

Inventor： 정승철

IPC: C21D9/00

Abstract: PURPOSE: A method for manufacturing a tappet core for an automobile is provided which improves durability of the tappet core by changing an ordinary carburizing heat treatment process into a high carbon carburizing heat treatment process, and improves the gas mileage by reducing friction loss with a cam. CONSTITUTION: In a method for manufacturing a tappet core comprising a shape processing process, a cold forging process, a carburizing heat treatment process and a post-treatment process using a MAC14 alloy steel which is made by adding 1.5 wt.% of Cr and 0.2 wt.% of Mo to a SCM415 alloy steel containing 0.15 wt.% of C, 0.25 wt.% of Si, 0.6 wt.% of Mn, 1.0 wt.% of Cr and 0.2 wt.% of Mo, the carburizing heat treatment process is performed by a high carbon carburizing heat treatment process comprising the steps of maintaining the alloy steel at a temperature of 780 deg.C for 30 minutes; heating the alloy steel at a temperature of 870 deg.C for 10 hours; maintaining the heated alloy steel at a temperature of 830 deg.C for 20 minutes; and tempering the oil cooled alloy steel at a temperature of 170 deg.C for 2 hours after oil cooling the resulting alloy steel to a temperature of 100 deg.C.

Abstract translation: 目的：提供一种制造汽车用挺杆的方法，其通过将通常的渗碳热处理工序变更为高碳渗碳热处理工序来提高挺杆的耐久性，并且通过减少摩擦损失来提高燃油里程 。 构成：在用于制造挺杆的方法中，包括形状加工工艺，冷锻工艺，渗碳热处理工艺和使用MAC14合金钢的后处理工艺，其通过加入1.5重量％的Cr和0.2 将Mo重量％添加到含有0.15重量％C，0.25重量％Si，0.6重量％Mn，1.0重量％Cr和0.2重量％Mo的SCM415合金钢中，渗碳热处理 通过高碳渗碳热处理方法进行处理，包括以下步骤：将合金钢保持在780℃的温度下30分钟; 在870℃的温度下加热合金钢10小时; 将加热的合金钢保持在830℃的温度下20分钟; 并在油冷却所得合金钢之后在170℃的温度下回火油冷合金钢2小时至100℃。

公开(公告)号：KR100208151B1

公开(公告)日：1999-07-15

申请号：KR1019960053913

申请日：1996-11-14

Applicant: 현대자동차주식회사

Inventor： 정승철

IPC: C23C8/24

CPC classification number: C23C8/22 ,  C23C8/80

Abstract: 침탄 공정, 냉각 소입 공정, 소려 공정에 의한 강의 열처리 방법에 있어서, 상기한 냉각 소입 공정후 800∼900

公开(公告)号：KR2019970035476U

公开(公告)日：1997-07-26

申请号：KR2019950052423

申请日：1995-12-29

Applicant: 현대자동차주식회사

Inventor： 정승철

IPC: B60R21/239

公开(公告)号：KR1019970039590A

公开(公告)日：1997-07-24

申请号：KR1019950046886

申请日：1995-12-05

Applicant: 현대자동차주식회사

Inventor： 정승철

IPC: B60R21/16

Abstract: 본 발명의 차량의 정면충돌에 따른 전개 시 충돌력에 비례하여 크기와 압력이 가변된 에어백에 관한 것이다.
본 발명은 저속충돌시에는 크기 (채적)가 작은 상태로 전개되어 호흡장애가 발생하지 않도록 하고 고속충돌시에는 관성력에 비례하여 크기가 점증되므로서 승객에게 상해를 주지 않는 완충성이 확보되도록 하기 위하여, 2장의 천이 내부에서 이음부(1)에 기준압력 이하의 단계에서 압력 도달시까지 다단으로 순차 파열될 수 있는 바느질선(2')을 기본바느질선 (2) 이외에 적어도 1개 이상 원주방향으로 추가형성시킨 것이다.

公开(公告)号：KR1020040013851A

公开(公告)日：2004-02-14

申请号：KR1020020046938

申请日：2002-08-08

Applicant: 현대자동차주식회사

Inventor： 정승철

IPC: G01L1/25

Abstract: PURPOSE: A method for measuring residual stress in austenite is provided to precisely predict a fatigue life of parts by measuring residual stress in austenite existing in the surface of a carburized alloy metal. CONSTITUTION: An X-ray diffractometer is used to measure residual stress in the surface of an alloy metal. X-ray is radiated onto the surface of the austenite existing on the surface of the alloy metal by using an X-ray generator(12) of the X-ray diffractometer. At this time, the X-ray is radiated onto the surface of the alloy metal such that the X-ray has an incident angle(2theta) of 119 to 149.8deg. by moving a goniometer(11), thereby measuring a maximum diffraction angle. By using the maximum diffraction angle, a delta(2theta)/delta(sin¬2pi) is calculated. Then, the resultant value is multiplied by a stress constant K of the austenite.

Abstract translation: 目的：提供一种测量奥氏体残余应力的方法，通过测量渗碳合金金属表面存在的奥氏体中的残余应力来精确预测零件的疲劳寿命。 构成：使用X射线衍射仪测量合金金属表面的残余应力。 通过使用X射线衍射仪的X射线发生器（12）将X射线照射到存在于合金金属表面的奥氏体的表面上。 此时，将X射线照射到合金金属的表面上，使得X射线的入射角（2θ）为119〜149.8度。 通过移动测角器（11），从而测量最大衍射角。 通过使用最大衍射角，计算Δ（2θ）/ delta（sin2pi）。 然后，将所得值乘以奥氏体的应力常数K.

公开(公告)号：KR1020020085366A

公开(公告)日：2002-11-16

申请号：KR1020010024847

申请日：2001-05-08

Applicant: 현대자동차주식회사

Inventor： 정승철

IPC: C23C8/20

CPC classification number: C23C8/22 ,  C21D1/06 ,  C21D1/19 ,  C21D2211/008 ,  C23C8/02 ,  C23C8/80

Abstract: PURPOSE: A carburization process for improving wear resistance and performance of alloy steels is provided to prevent the occurrence of retained austenite. CONSTITUTION: The carburization process includes the steps of soaking alloy steels at 900 to 930 deg.C for 1.5 to 3 hrs; carburizing the alloy steels at 900 to 930 deg.C for 2 to 4 hrs; quenching the alloy steels at 840 to 860 deg.C for 1 to 3 hrs; oil quenching the alloy steels at 150 to 230 deg.C for 1.5 to 3 hrs; and sub-zero treatment at -73 to -196 deg.C.

Abstract translation: 目的：提供一种改善合金钢耐磨性和性能的渗碳方法，以防止残余奥氏体的发生。 构成：渗碳工艺包括将合金钢在900〜930℃浸泡1.5〜3小时的工序; 将合金钢在900〜930℃下渗碳2〜4小时; 将合金钢在840〜860℃淬火1〜3小时; 将合金钢在150〜230℃淬火1.5〜3小时; 在-73至-196℃的次零处理。

公开(公告)号：KR100346469B1

公开(公告)日：2002-07-27

申请号：KR1019990058287

申请日：1999-12-16

Applicant: 현대자동차주식회사

Inventor： 정승철

IPC: C21D9/00

Abstract: 본발명은자동차용태핏심과그 제조방법에관한것으로, SCM415 합금강에크롬(Cr), 몰리브덴(Mo)을더 첨가한 MAC14 합금강으로구성된자동차용태핏심의제조방법중일반침탄열처리공정을고탄소침탄열처리공정으로변경하여태핏심의내구성을향상시키고캠과의마찰손실을저감함으로써자동차의주행연비를향상시킬수 있는자동차용태핏심의제조방법을제공하고자한 것이다.

公开(公告)号：KR1020010063311A

公开(公告)日：2001-07-09

申请号：KR1019990060345

申请日：1999-12-22

Applicant: 현대자동차주식회사

Inventor： 박현수 ,  김학진 ,  김종문 ,  정승철

IPC: C22C33/08

CPC classification number: C22C37/04 ,  C21C1/08 ,  C21C1/10 ,  C22C33/10 ,  C22C37/10

Abstract: PURPOSE: A method for manufacturing CV (compacted vermicular) graphite iron for engines is provided to increase mechanical properties such as tensile strength, yield strength, elastic modulus and rigidity, improve noise and vibration reducing effects, and performance and durability reliability of the engines by using CV graphite iron which is manufactured by compensating the magnesium content as a durable material for engines. CONSTITUTION: In a method for manufacturing a CV graphite iron using cast iron comprising a main constituent of iron, and carbon, silicon, manganese, phosphorus, sulphur, chromium, molybdenum, copper and tin, the method comprises the processes of injecting molten metal having a temperature of 1500 to 1560 deg.C in which 0.020 to 0.028 wt.% of magnesium is additionally added to the above cast iron into a mold; and additionally re-adding magnesium the molten metal so that the magnesium content in the molten metal is in the range of 0.01 to 0.017 wt.%.

Abstract translation: 目的：提供用于制造用于发动机的CV（压实蠕虫）石墨铁的方法，以增加机械性能，例如拉伸强度，屈服强度，弹性模量和刚度，改善噪音和减振效果，以及发动机的性能和耐久性可靠性 使用通过补偿镁含量作为发动机的耐用材料制造的CV石墨铁。 构成：在使用包含铁，碳，硅，锰，磷，硫，铬，钼，铜和锡的主要成分的铸铁制造CV石墨铁的方法中，该方法包括注入具有 温度为1500〜1560℃，其中将0.020〜0.028重量％的镁另外加入到铸型中; 并且另外重新加入熔融金属镁，使得熔融金属中的镁含量在0.01至0.017重量％的范围内。