Claims (4)
프리하든 금형강에 있어서, 탄소(C) 0.30-0.65%, 시리콘(Si) 0.10-1.50%, 망간(Mn) 0.10-1.50%, 크롬(Cr) 3.00-7.00%, 몰리브덴(Mo) 1.00-2.00%, 바나듐(V) 0.20-1.50%, 칼슘(Ca) 0.0005-0.1000%, 지르코늄(Zr) 0.005-0.400%, 셀레니움(Se) 0.0005-0.2000%, 유황(S) 0.005-0.20%,나머지가 철(Fe)과 0.030%이하의 인(P), 0.01%이하의 질소(N)와 산소(O), 0.5%이하의 수소등 불순물로 된 조성(중량%)을 가지며 담금질과 템퍼링에 의한 열처리경도(HRC) 38-42를 갖는 AlㆍZn다이용 및 고급 플라스틱 사출 금형강.In pre-hardened mold steel, carbon (C) 0.30-0.65%, silicon (Si) 0.10-1.50%, manganese (Mn) 0.10-1.50%, chromium (Cr) 3.00-7.00%, molybdenum (Mo) 1.00- 2.00%, Vanadium (V) 0.20-1.50%, Calcium (Ca) 0.0005-0.1000%, Zirconium (Zr) 0.005-0.400%, Selenium (Se) 0.0005-0.2000%, Sulfur (S) 0.005-0.20%, the rest It has a composition (wt%) of impurities such as iron (Fe), phosphorus (P) of less than 0.030%, nitrogen (N) and oxygen (O) of less than 0.01%, and less than 0.5% of hydrogen, and heat treatment by quenching and tempering High quality plastic injection mold steel for Al / Zn dies with hardness (HRC) 38-42.
제1항에 있어서, 유황(S)의 함량이 0.030%이하로 제한함으로써 황화망간 (MnS)의 생성을 억제하는 것을 특징을 하는 프리하든 금형강.The pre-hard mold steel according to claim 1, wherein the production of manganese sulfide (MnS) is suppressed by limiting the content of sulfur (S) to 0.030% or less.
프라히든 금형강의 제조방법에 있어서, 탄소(C) 0.30-0.65%,시리콘(Si) 0.10-1.50%, 망간(Mn) 0.10-1.50%, 크롬(Cr) 3.00-7.00%, 몰리브덴(Mo) 1.00-2.00%, 바나듐(V) 0.20-1.50%, 칼슘(Ca) 0.0005-0.1000%, 지르코늄(Zr) 0.005-0.400%, 셀레니움(Se) 0.0005-0.2000%, 유황(S) 0.005-0.20%, 나머지가 철(Fe)과 0.030%이하의 인(P), 0.01%이하의 질소(N)와 산소(O), 0.5%이하의 수소등 불순물로 된 조성(중량%)을 가지는 금형강을 제강, 단조한 후 840-900℃사이로 어닐링하고 1000-1060℃에서 담금질하며 620-680℃로 템퍼링함을 특징으로 하여 최적경도 38-42의 프리하든 금형강을 제조하는 방법.In the method of manufacturing the plastic mold steel, carbon (C) 0.30-0.65%, silicon (Si) 0.10-1.50%, manganese (Mn) 0.10-1.50%, chromium (Cr) 3.00-7.00%, molybdenum (Mo) 1.00-2.00%, Vanadium (V) 0.20-1.50%, Calcium (Ca) 0.0005-0.1000%, Zirconium (Zr) 0.005-0.400%, Selenium (Se) 0.0005-0.2000%, Sulfur (S) 0.005-0.20%, The remainder is made of steel with a composition (wt%) of impurities such as iron (Fe) and phosphorus (P) of 0.030% or less, nitrogen (N) and oxygen (O) of 0.01% or less and hydrogen or less of 0.5% or less. After the forging, annealing between 840-900 ℃, quenched at 1000-1060 ℃ and tempered to 620-680 ℃ characterized in that the manufacturing method of pre-hardened mold steel with an optimum hardness of 38-42.
제3항에 있어서, 620-680℃에서 재템퍼링을 수행하는 것을 특징으로 하는 방법.The method of claim 3, wherein retempering is performed at 620-680 ° C. 5.
※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.