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    • 2. 发明授权
    • 내마모성 향상을 위한 볼 밸브의 표면코팅 방법
    • KR102464318B1
    • 2022-11-09
    • KR1020210023780
    • 2021-02-23
    • C23C10/40C23C10/02C23C10/60F16K5/06C22C38/44C22C38/18
    • 본발명은, 내마모성향상을위한볼 밸브의표면코팅방법에있어서, 크롬분말 5 내지 10 중량%, 활성제 0.08 내지 5 중량% 및불활성제 75 내지 90 중량%가혼합된팩 혼합물을준비하는준비단계, 팩에철계모재및 팩혼합물분말을투입하는투입단계, 철계모재및 팩혼합물분말이투입된팩이진공챔버에장입되는장입단계, 진공챔버를작동시켜 350 내지 400℃에서 2시간내지 4시간동안전열처리하되, 상기진공챔버내부의진공도는 5 내지 15mTorr로설정되며, 상기진공챔버내부에 3.5 내지 4.5 L/min 유량의질소가스가주입되어퍼징되는전열처리단계, 상기전열처리단계이후진공챔버내부의온도를공정온도까지승온시키는승온단계, 상기승온단계에서승온된공정온도에서기 설정된시간동안가열하여코팅층을형성하는코팅형성단계및 코팅층형성이완료된후 상기진공챔버내부의온도를 250 내지 300℃에서 2시간내지 4시간동안후열처리하는후열처리단계;를포함하는것을특징으로하는내마모성향상을위한볼 밸브의표면코팅방법을제공한다.
    • 8. 发明公开
    • 자동차 엔진용 체인
    • 用于汽车发动机的链条
    • KR1020080048392A
    • 2008-06-02
    • KR1020070097349
    • 2007-09-27
    • 가부시기가이샤쯔바기모도체인
    • 미야나가쇼타
    • F16G13/06C23C10/40F16G13/00
    • F16G13/06
    • A chain for use in an automobile engine is provided to ensure long-lasting lubricity and to reduce attack ability to a bushing resulting in improved shock resistance. A chain for use in an automobile engine comprises a pair of bushings wherein both ends of each bushing are press-fitted to bushing holes of a pair of inner plates, and a pair of pins that are loosely fitted into the bushes wherein both ends of each pin is press-fitted to pin holes of a pair of outer plates disposed outside the inner plates. Each pin comprises a base material, a chromium carbide layer formed on the surface of the base material by diffusion penetration, an inner layer containing Cr7C3, an outermost layer containing Cr23C6, and surface recessions with low surface pressure on the outermost layer in a size enough to receive inclusions from lubricating oil.
    • 提供用于汽车发动机的链条以确保持久的润滑性并且降低对衬套的攻击能力,从而提高抗冲击性。 用于汽车发动机的链条包括一对衬套,其中每个衬套的两端压配合到一对内板的衬套孔中,以及一对松动地装配到衬套中的销,其中每个衬套的两端 销被压配合到设置在内板外侧的一对外板的销孔。 每个销包括基材,通过扩散渗透形成在基材表面上的碳化铬层,含有Cr7C3的内层,含有Cr23C6的最外层和在最外层具有低表面压力的表面凹陷,其尺寸足够 从润滑油中接收夹杂物。