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41. 发明公开

KR1020050009965A 철강제 기계부품의 질화처리방법 有权
标题翻译：通过对机械钢部件工件进行预加工和加工步骤，大大提高机械钢部件表面耐腐蚀性的方法
公开(公告)号：KR1020050009965A
公开(公告)日：2005-01-26
申请号：KR1020040101101
申请日：2004-12-03
申请人： 케이비오토시스 주식회사
发明人： 김용길
IPC分类号： C23C8/26
摘要： PURPOSE: To provide a method that improves surface hardness and greatly improves surface corrosion resistance of the workpiece, thereby greatly extends life of mechanical steel parts by performing gas nitriding on a workpiece using NH3 gas by a nitriding temperature of 580 deg.C and performing gas nitrocarburizing on the workpiece using a mixed gas of NH3, N2 and CO2 at the nitriding temperature. CONSTITUTION: In a method for nitriding the surface of mechanical steel parts formed of carbon steel that are objects to be treated, the method comprises a preheating step of charging a cleaned object to be treated into a heat treatment furnace, and nitriding the object using NH3 gas only by infusing the NH3 gas into the heat treatment furnace in a flow rate of 30 to 40 L/min while heating the heat treatment furnace to 580 deg.C; and a nitriding step of purging an atmospheric gas in the heat treatment furnace composed in the preheating step while maintaining temperature of the heat treatment furnace as it is, and continuously introducing a mixed gas consisting of 70 vol.% of NH3, 20 vol.% of N2 and 10 vol.% of CO2 into the heat treatment furnace in a flow rate of 80 to 90 L/min, thereby nitriding the object to be treated for 70 to 100 minutes so that a nitride layer is formed on the surface of the object to be treated.
摘要翻译：目的：提供一种提高表面硬度并大大提高工件表面耐腐蚀性的方法，通过在氮化温度为580摄氏度的NH 3气体下对工件进行气体氮化，大大延长机械钢件的使用寿命，并进行气体在氮化温度下使用NH3，N2和CO2的混合气体对工件进行氮碳共渗。构成：在用于将被处理物质的碳钢形成的机械钢部件的表面进行氮化的方法中，该方法包括将待处理被处理体填充到热处理炉中的预热步骤，并使用NH 3 气体仅在将热处理炉加热至580℃时，以30〜40L / min的流量将NH 3气体注入到热处理炉中; 以及在保持热处理炉的温度的同时，在预热步骤中组成的热处理炉中吹扫大气气体的氮化工序，连续地导入由70体积％NH 3，20体积％的N2和10体积％的CO 2以80〜90L /分钟的流量进入热处理炉，由此对被处理物进行氮化处理70〜100分钟，使得在表面上形成氮化物层对象被处理。

42. 发明公开

KR1020050008920A 강의 가스 질화 처리 방법 无效
标题翻译：根据钢材减少最佳气体氮化工艺时间的方法
公开(公告)号：KR1020050008920A
公开(公告)日：2005-01-24
申请号：KR1020030047801
申请日：2003-07-14
申请人： 두산중공업 주식회사
发明人： 김대중
IPC分类号： C23C8/26
CPC分类号： C23C8/26 , C22C38/001
摘要： PURPOSE: To optimize a process of gas nitriding steel that contains 0.15 to 0.42 wt.% of carbon(C), 1.0 to 2.25 wt.% of chromium(Cr), 0.4 to 1.05 wt.% of molybdenum(Mo), 0.0 to 0.65 wt.% of manganese(Mn), 0 to 0.22 wt.% of vanadium(V), 0.0 to 0.5 wt.% of silicon(Si) and 0.0 to 1.08 wt.% of aluminum(Al) and is used for valves for steam turbine. CONSTITUTION: The gas nitriding method of steel comprises a step(a) of charging an ammonia gas into a nitriding furnace until a ratio of ammonia gas becomes 98% in the nitriding furnace; a step(b) of increasing temperature of the furnace to 480 deg.C at a maximum heating rate of 100 deg.C/hr while injecting ammonia gas into the furnace at a flow rate of 4 m¬3/hr; a step(c) of rapidly heating the product to 530 deg.C within 1 hour while increasing an ammonia flow rate to 4.5 m¬3/hr if temperature of a product reaches 480 deg.C; a step(d) of maintaining the product for 1 hour while adjusting an amount of ammonia gas flown in the furnace such that a decomposition ratio of ammonia gas is maintained between 25% and 35% if temperature of the product reaches 530 deg.C; a step(e) of rapidly heating temperature of the product to 555 deg.C within 1 hour, and adjusting an amount of ammonia gas flown in the furnace such that a decomposition ratio of ammonia gas is maintained between 60% and 80% if temperature of the product reaches 550 deg.C; a step(f) of maintaining the product at 555 deg.C for 23 to 30 hours in the state that a decomposition ratio of ammonia gas is maintained in a range of 60 to 80%; a step(g) of stopping supply of ammonia gas, starting supply of nitrogen gas into the furnace, and cooling the product to 500 deg.C by cooling the product at a cooling rate of 75 deg.C/hr; a step(h) of turning off a heater, and cooling the nitriding furnace to 100 deg.C at a cooling rate of 75 deg.C/hr while supplying 4 m¬3/hr of nitrogen gas into the furnace if ammonia gas is not remained in the nitriding furnace as a result of measurement after measuring density of gas contained in the nitriding furnace; and a step(i) of stopping supply of nitrogen gas and opening a cover for the nitriding furnace when temperature of the nitriding furnace is cooled to 100 deg.C.
摘要翻译：目的：优化含碳（C）0.15〜0.42重量％，铬（Cr）1.0〜2.25重量％，钼（Mo）0.4〜1.05重量％，钼（Mo）0.0〜 0.65重量％的锰（Mn），0〜0.22重量％的钒（V），0.0〜0.5重量％的硅（Si）和0.0〜1.08重量％的铝（Al），用于阀用于汽轮机。构成：钢的气体氮化方法包括将氨气充入氮化炉中的步骤（a），直到氮化炉中氨气的比例达到98％将炉子的温度以100℃/小时的最大加热速率升高至480摄氏度的步骤（b），同时以4m 3 / hr的流速向炉中注入氨气; 将产物在1小时内快速加热到530℃的步骤（c），同时如果产品的温度达到480摄氏度，则将氨流量提高到4.5m 3 / hr; 在调节在炉内流动的氨气量的同时维持产品1小时的步骤（d），如果产品的温度达到530℃，氨气的分解比率保持在25％至35％之间; 将产物在1小时内迅速加热至555℃的步骤（e），并调节在炉中流动的氨气量，使氨气的分解率保持在60％至80％之间，如果温度的产品达到550摄氏度; 在将氨气的分解比维持在60〜80％的范围的状态下，将产物在555℃下保持23〜30小时的工序（f）停止供给氨气的步骤（g），开始向炉内供给氮气，并以75℃/小时的冷却速度冷却该产品，将其冷却至500℃。关闭加热器的步骤（h），并且以75℃/小时的冷却速率将氮化炉冷却至100℃，同时如果氨气为氢气，则向炉内供应4m 3 /小时的氮气在氮化炉中测量的气体密度测定后，不会留在氮化炉中; 以及在氮化炉的温度冷却至100℃时停止氮气供给和打开氮化炉用盖的工序（i）。

43. 发明公开

KR1020000010664A 암모니아와 반응시켜 발달된 고강도 딥 드로잉 스틸 无效
标题翻译：通过与氨反应开发的高强度深冲钢
公开(公告)号：KR1020000010664A
公开(公告)日：2000-02-25
申请号：KR1019980708633
申请日：1997-05-16
申请人： 유에스엑스엔지니어즈컨설턴츠인코퍼레이티드
发明人： 랠리,제이.,스코트 , 홀라,해리쉬,에이.
IPC分类号： C21D1/08 , C21D8/04 , C23C8/26
CPC分类号： C21D8/0457 , C23C8/26
摘要： PURPOSE: A method for preparing a sheet of deep drawing quality special killed-fully stabilized type steel of uniform enhanced strength and good formability and weldability is provided. CONSTITUTION: The method comprises providing an essentially unalloyed interstitial free carbon steel melt having C 0.001-0.01%, Mn 0.15-0.50%, Si 0.005-0.03%, AL 0.02-0.06%, S 0.002-0.015%, N 0.001-0.01%, O 0.001-0.01% and Fe balance; adding to the steel melt a strengthening element selected from Ti, Nb, V and mixtures thereof in total amount from about 0.01-0.3 free atomic percent available strengthening element uncombined with other elements; casting and hot rolling or hot rolling followed by cold rolling the steel; coiling the rolled sheet; annealing the rolled sheet at about 1275-1350 °F; treating the annealed sheet in an open coil annealing furnace in an isothermal step at a nitriding temperature about 800-1250 °F with a nitriding gas to nitride the steel through at least a portion of the sheet thickness; recirculating the nitriding gas; controlling the strengthening of the steel sheet as a function of steel composition, the nitriding gas composition, nitriding time, nitriding temperature, thickness of the steel sheet and depth of strengthening desired to provide a steel sheet having an 0.2% off-set yield strength after temper rolling of at least about 45 ksi and a r value in excess of about 1.8 for the cold rolled sheet.
摘要翻译：目的：提供一种强度均匀，成型性和焊接性均匀的深冲特性的特种杀死完全稳定型钢板的制备方法。构成：该方法包括提供C 0.001-0.01％，Mn 0.15-0.50％，Si 0.005-0.03％，AL 0.02-0.06％，S 0.002-0.015％，N 0.001-0.01％的基本上非合金的无间隙碳钢，，0.001-0.01％，Fe平衡; 向钢熔体中加入选自Ti，Nb，V及其混合物的强化元素，其总量为未结合其它元素的约0.01-0.3重量％游离原子％的可用强化元素; 铸造和热轧或热轧，然后冷轧钢; 卷取卷材; 在约1275-1350°F退火轧制板; 在氮化温度约800-1250°F的等温步骤中，在开放式线圈退火炉中处理退火的板材，其中氮化气体通过至少一部分板厚度对钢进行氮化; 再循环氮化气体; 控制钢板的强化作为钢组成的函数，氮化气体组成，氮化时间，氮化温度，钢板的厚度以及所需的强化强度，以提供具有0.2％屈服强度后的屈服强度为0.2％的钢板对于冷轧板，回火轧制为至少约45ksi，ar值超过约1.8。

44. 发明授权

KR1019920001613B1 금속 성분의 표면 내마모성 개선방법 无效
标题翻译：改善金属部件表面质量的方法
公开(公告)号：KR1019920001613B1
公开(公告)日：1992-02-20
申请号：KR1019870003332
申请日：1987-04-08
申请人： 루카스인더스트리트포블릭리미티드
发明人： 시릴다우에스 , 도날드프레데리크트란터
IPC分类号： C23C8/56 , C23C8/26
CPC分类号： C23C8/32 , C23C8/02 , C23C8/26
摘要： 내용 없음.

45. 发明公开

KR870010211A 개량된 표면 마모품질의 금속성분의 처리방법 失效
公开(公告)号：KR870010211A
公开(公告)日：1987-11-30
申请号：KR870003332
申请日：1987-04-08
IPC分类号： C23C8/02 , C23C8/26 , C23C8/32
摘要： 내용없음

46. 发明公开

KR1020210093829A 기어용 강의 복합 열처리 방법 有权
公开(公告)号：KR1020210093829A
公开(公告)日：2021-07-28
申请号：KR1020210095612
申请日：2021-07-21
IPC分类号： C23C8/26 , C23C8/80 , C23C8/02 , C23F17/00 , C21D9/32 , C21D1/06 , C21D1/25
摘要： 본발명은기어용강의복합열처리방법에관한것으로, 소재가장입된열처리로에암모니아(NH3)와질소(N2) 및수소(H2) 가스를주입시키고질소포텐셜(KN)을제어하여소재의표면에 Fe3N(ε상)과 Fe4N(γ`상)의결정구조가혼합된화합물층을형성시키는질화열처리단계및 상기질화열처리단계를거친소재를고주파가열하여소재의표면에형성된상기화합물층의질소를소재내부로고용시키는고주파열처리단계를포함하여상 제어를통한질화열처리및 고주파열처리에의하여저변형성및 내구성을증가시킬수 있는효과가있다.

47. 发明公开

KR1020210020647A 질화로 시스템 有权
公开(公告)号：KR1020210020647A
公开(公告)日：2021-02-24
申请号：KR1020190100428
申请日：2019-08-16
申请人： (주)상도티디에스
发明人： 조형준 , 허웅열 , 이구현
IPC分类号： C23C8/24 , C23C8/26
摘要： 본발명은질화로; 상기질화로에암모니아가스를공급하기위한저장탱크; 상기저장탱크로부터상기질화로에투입되는, 투입암모니아가스의유량을측정하기위한전자유량계; 상기질화로의내부에잔존하는, 잔존암모니아가스유량을측정하기위한암모니아유량측정부; 및상기질화로에서상기암모니아유량측정부로상기질화로의가스를투입하기위한가스투입라인을포함하는질화로시스템에관한것으로, 고가의질소포텐셜(KN) 측정장비를배제하고, 질화로내의암모니아가스의유량을실시간으로측정하여질소포텐셜(KN)을제어할수 있는질화로시스템을제공할수 있다.

48. 发明授权

KR102214948B1 락와셔 有权
公开(公告)号：KR102214948B1
公开(公告)日：2021-02-10
申请号：KR1020167035260
申请日：2015-05-15
申请人： 엑시파니테 테크놀로지 에이/에스
发明人： 후멜쇼,토마스스트라보
IPC分类号： C23C8/26 , C21D1/06 , C21D6/00
摘要： 본발명은반복되는변형및 완화에적합한프로파일요소에관한것으로, 프로파일요소는적어도 9 중량%의크롬및 5 중량% 이하의니켈을포함하는표면경화된스테인리스스틸로제조되며, 프로파일요소는 0.2 mm 내지 3 mm 범위의물질두께를가지고, 경화심도가 10 ㎛내지 50 ㎛이고표면경도가 750 HV0.05 이하인질소마르텐사이트계표면을가지며, 적어도 9 중량%의크롬및 5 중량% 이하의니켈을포함하는스테인리스스틸로제조되는가공물을경화시키는방법에관한것으로, 상기가공물은 0.2 mm 내지 3 mm 범위의두께를가지고, 상기방법은하기단계를포함한다:- 상기스테인레스스틸의시트로부터천공된상기가공물을제공하는단계; - 상기가공물을선택적으로엠보싱하는단계; - 질소함유가스의분위기에서질화물의용해온도보다높고스테인리스스틸의용융점보다낮은온도(Thigh)에서상기가공물에서적어도질소를용해시키는단계를포함하고, 상기온도(Thigh)에서의질소용해는 0.05 중량% 내지 0.5 중량% 범위의질소함량을갖는 10 ㎛내지 50 ㎛범위의확산심도를갖도록수행되며, - 상기온도(Thigh)에서의용해단계후 상기가공물을상기스테인리스스틸에질화물이형성되는온도보다낮은온도(Tlow)까지냉각시켜, 질소마르텐사이트계표면을제공하는단계를포함하고, 상기냉각은 60초이내에수행된다. 프로파일요소는베어링요소및 체결요소를서로고정시키기위한고정요소일수 있고, 방법은고정요소의제조에적합하다.

49. 发明公开

KR20200145820A 조리 용기의 표면 처리 방법 및 그에 의한 조리 용기 审中-公开
公开(公告)号：KR20200145820A
公开(公告)日：2020-12-30
申请号：KR20200183071
申请日：2020-12-24
申请人： YANG SANG CHUL
发明人： YANG SANG CHUL
IPC分类号： C23C8/26 , A47J36/02 , C23C8/18 , C23C8/34 , C23C8/80
摘要： 본발명은조리용기의표면처리방법및 그에의한조리용기에관한것이다. 조리용기의표면처리방법은탄소함량이전체중량의 0.20 wt% 이하가되는강철소재의조리용기를준비하는단계; 조리용기의표면처리가되는단계; 표면처리가된 조리용기의표면을암모니아및 질소를포함하는기체분위기에서질화처리를하는단계; 및질화처리가된 표면을산화처리를하는단계를포함하고, 질화처리과정에서다공층이 0.5 내지 5 ㎛의두께로형성된다.

50. 发明授权

KR102125804B1 질화 처리 강 부품 및 그의 제조 방법 有权
公开(公告)号：KR102125804B1
公开(公告)日：2020-06-23
申请号：KR1020187005947
申请日：2016-09-08
申请人： 닛폰세이테츠 가부시키가이샤
发明人： 우메하라다카히데 , 유야마사토 , 다이토요시히로
IPC分类号： C21D3/08 , C23C8/26 , C23C8/80 , C22C38/04 , C22C38/06 , C22C38/00 , C22C38/22 , C22C38/24 , C21D1/76 , C22C38/02

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