A 681 D2化學成分 - A 681 (2008)

C	Si	Mn	P	S	Cr	Ni	Cu	V	Mo
1.40-1.6	≤0.6	≤0.6	≤0.03	≤0.03	11.50-13.00	≤0.25	≤0.30	≤1.00	≤0.70

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A 681 D2標準規(guī)范

• A 681 (2008) - Tool Steels Alloy

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A 681 D2機械性能

D2 steel is high wear-resisting micro deformation of cold work die steel, belong to the wind type hard tool steel.The mass fraction of the carbon steel is as high as 1.5%, mass fraction of chromium is as high as 11.5%, the hardness after heat treatment can reach 60 HRC, but relatively ductility, toughness, rust resistant ability is weak, the steel surface is also difficult to make mirror polishing processing.With cold stamping products towards high precision, high efficiency, the development of more varieties, for die steel has good abrasion resistance and toughness.Compared with Cr12MoV steel, on chemical composition of the steel increased Mo, V, changed the steel casting organization, improved the morphology of austenite dish, strong toughness and abrasion resistance is better than that of Cr12MoV steel, improve the service life of the mold.Due to the yield point and the plastic deformation resistance of the steel is Cr12MoV steel is high, so the forging properties and hot molding Cr12MoV steels are slightly older.

hardness
Annealing acuities were 255 hb, indentation diameter of 3.8 mm or more;
Quenching acuity 59 HRC
Heat treatment specification
Quenching, 820 + 15 ℃ preheat, 820 + 6 ℃ (salt bath) or 1010 + 6 ℃ heating furnace atmosphere,
Cold insulation 10 ~ 20 min, empty, 200 + 6 ℃ tempering.

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A 681 D2產(chǎn)品形態(tài)

• 熱軋和冷拉棒材, 圓棒, 扁鋼, 六角棒, 八角棒, 空心棒
• 帶鋼和鋼卷, 熱軋帶鋼, 熱軋鋼卷, 冷軋鋼帶, 冷軋鋼卷
• 冷軋板材, 熱軋板, 冷軋薄板, 中厚板, 高強鋼板
• 熱軋和冷拉異型鋼, 凹凸字鋼, 滑軌, 滑塊
• 熱軋和冷拉鋼絲, 扁絲, 盤條, 直條
• 自由鍛和模鍛, 扁鋼, 模塊, 環(huán), 桶, 餅, 階梯軸及定制化
• 熱擠壓和冷軋無縫管, 異型管, 方管, 毛細管
• 電渣錠

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