Cr2铬钢/冷作模具钢Cr2高碳合金工具钢
【合结钢】基本说明
Cr2刃具用钢,此钢成分与GCr15轴承钢相当,其淬透性、硬度和耐磨性都较碳素工具钢高,热处理时尺寸变化也不大。广泛用作量具,如样板、卡板、样套、量规、块规、环规、螺纹塞规和样柱等,也可用于制造拉丝模和冷镦模等冷作模具,以及低速刀具切削不太硬的材料。
【合结钢】产品特点
High carbon chrome steel GCr15 Cr2 and rolling bearings have the same chemical composition and properties, cheap and in high carbon chromium steel belongs to the comprehensive performance of the best economical quenching oil quenching water of cold work die steel. Cr2 is equivalent to on the basis of the T10 steel to join the mass fraction of 1.5% chromium, has greatly improve the hardenability. The quenching oil critical diameter of 15 ~ 25 mm or water for 30 ~ 50 mm. Die cavity deformation trend is the trend of the thin expansion; General mold parts oil quenching or alkali bath quenching is indented. With nitrate bath or hot oil bath interrupted quenching, the inner hole is bloated, but variable. Cr2 wall thickness steel mold parts < 25 mm can quench oil; 38 ~ 80 mm can use kerosene or alkali bath or saline solution hardening; Thickness is greater than 100 mm cold heading die need pressure water spray quenching.
【合结钢】参数规格
Cr2化学成份:
碳 C :0.95~1.10
硅 Si:≤0.40
锰 Mn:≤0.40
硫 S :≤0.030
磷 P :≤0.030
铬 Cr:1.30~1.65
镍 Ni:允许残余含量≤0.25
铜 Cu:允许残余含量≤0.30
【合结钢】适用范围
高碳铬钢Cr2和滚动轴承GCr15化学成分和性能基本相同,价廉易得,在高碳铬钢中属于综合性能X好的经济型淬油淬水通用的冷作模具钢。Cr2钢相当于在T10的基础上加入质量分数为1.5%的铬,使淬透性大为提高。其淬火临界直径油为15~25MM或水为30~50MM。冲模型腔变形趋势是薄型趋胀;一般模具零件油淬或碱浴淬火趋缩。用硝盐浴或热油浴分X淬火,内孔趋胀,但变量小。Cr2钢模具零件壁厚 <25mm时可用油淬;38~80MM时可用煤油或碱浴或盐水溶液淬硬;厚度大于100MM的冷镦模需用加压水喷淬。
该钢淬火后的硬度、耐磨性都很高, 淬火变形不大, 但高温塑性差。该钢在淬火时, 薄形模具尺寸趋胀, 一般模具经油淬、碱浴淬火尺寸趋缩, 水冷淬火尺寸趋胀; 使用硝盐或热油分X淬火, 内孔趋胀。模具厚度<25mm时可进行油冷淬火, 当尺寸在38~80mm之间时可用机油、碱浴、食盐或碱的水溶液冷却淬火。而模具厚度>100mm及外径>25mm的冷镦模需用加压水喷淬