牌号:W18Cr4VCo5 |
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标准:GB/T9943-1988 |
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●特性及适用范围: |
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为钨系一般含钴型高速钢,较W18Cr4V的红硬性和高温硬度稍高,但韧性低,淬火后,表面硬度可达63~66HRC。用作高速切削刀具、自动化机床的刀具,供切削较高强度材料用。 |
●化学成份: |
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碳C:0.70~0.80(允许偏差:±0.01) |
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硅Si:0.20~0.40(允许偏差:±0.05) |
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锰Mn:0.10~0.40(允许偏差:+0.04) |
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硫S:≤0.030 |
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磷P:≤0.030 |
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铬Cr:3.75~4.50(允许偏差:±0.05) |
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镍Ni:允许残余含量≤0.30 |
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铜Cu:允许残余含量≤0.25 |
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钒V:0.80~1.20(允许偏差:±0.05) |
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钼Mo:0.40~1.00(允许偏差:尺寸≤6,±0.05;尺寸>6,±0.10) |
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钨W:17.50~19.00(允许偏差:尺寸≤10,±0.10;尺寸>10,±0.20) |
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钴Co:4.25~5.75(允许偏差:±0.15) |
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●力学性能: |
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硬度:交货硬度:(其他加工方法)≤285HB;(退火)≤269HB。试样热处理制度及淬回火硬度:≥63HRC |
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●热处理规范及金相组织: |
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热处理规范:淬火,820~870℃预热,1270~1290℃(盐浴炉)或1280~1300℃(箱式炉)加热,油冷,540~560℃回火2次,每次2h。 |
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●交货状态:热轧、锻制、冷拉钢棒以退火状态交货,热轧、锻制钢棒以退火+其他加工方法(剥皮、轻拉、磨光或抛光等)加工后交货 |