6W6Mo5Cr4V2钨钼系高速钢_钢片

　　6W6MO5CR4V2材料的特性

　　6W6MO5CR4V2钢是碳还原和钨钨钼系统高速钢本质与W6MO5CR4V2钢相比，碳的质量评分降低了20％，板球的质量得分降低了50％。目前，它是中国新钢种的相对成熟的高速且坚韧的轴承能力。减少碳和板球的含量将导致MC碳化物和碳化物的总含量，改善碳化物的分布均匀性，并将普通晶体碳化物的不均匀度降低1至2。

　　钢的锻造温度狭窄，锻造温度为 <1100 ° C. It still needs to be deep forging according to the forging operation of Lai's steel steel and control the direction of the streamline. The annealing is easy to soften, and the hardness is less than 229hbw, which can be processed well. Cold pressure rough softening processing process, using upper temperature heating, segmentation equivalent, and then additional temperature recovery process, the same as W18CR4V steel.

　　The steel bending strength and plasticity of the steel quenching and hardening state increased by 30%to 50%, and the impact toughness increased by 50%to 100%. It still maintains sufficient dual -hardening capacity and thermal stability. The quenching temperature of the steel is 1180 to 1200 ° C (grain size 10-11), and the hardness is 60-63HRC after three renegation of 560 to 580 ° C.

　　The impact toughness of the secondary hardening state has increased significantly with the decrease of quenching temperature, but the hardness decreases. The strength value at the time of fire is located at 560 ~ 580 ° C, and the peak of the hardness is 540-560 ° C.

　　The hardness of the annealing state ≤ 255hbw, the hardness of other processing status ≤ 262HBW.

　　6W6MO5CR4V2 chemical composition

　　The steel chemical composition (mass score): C0.55%～ 0.65%, Si ≤ 0.40%钢片 , mn ≤ 0.60%, CR3.70%～ 4.30%, W6.00%～ 7.00%, MO4.50%～ 5.50% , V1.70%～ 1.10%.

　　Critical point temperature (approximate value)

　　AC1 = 835 ° C, AC3 = 885, AR3 = 770 ° C, AR1 = 820 ° C, MS = 177 ° C.

　　Molding Rough Winning Normalization Specification Specification

　　850 ~ 870 ° C × 3 ～ 4h, furnace cold钢片 , 740 ~ 760 ℃ × 4-5h, hardness ≤ 229HBW, and the level of common crystal carbides ≤3.

　　Soft -proof treatment specifications of cold pressure rough

　　(880 ± 10) ° C × 3 ～ 4h, cool down with the furnace, (770 ± 10) ℃ × 6 ～ 8h, then cool down to (750 ± 10) ℃ × 2 ～ 3h, slow cold to ≤650 ° C. The hardness before treatment ≤ 229hbw, and the hardness after treatment ≤207.

　　Study and recovery specifications

　　The quenching temperature is 1180 ~ 1200 ° C钢片, the oil is cold, the hardness is ≥60HRC, and the ignition temperature is 560 ~ 580 ℃.

　　6W6MO5CR4V2 typical application example

　　When making steel parts cold squeezing convex mold, the hardness is 62-64HRC.

　　When it is used to make the convex and concave molds in the squeezing temperature> 选择400°C，60-62hrc和62-64hrc的硬度。

　　用于高速切割工具。

　　用于精密冷模。

　　对于螺丝模具，大头部形成模具和刀具。