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一、用湿黄泥条堵孔法例①:45号钢制各类镗刀杆,要求硬度HRC40～45,盐浴炉(或箱式电炉)830℃加热,工件奥氏体化后从炉中取出,迅速将事先预备好的湿黄泥条堵塞每个定位孔和螺孔,再进行水淬油冷。淬火硬度>HRC55,380℃回火,终检硬度为HRC40～43。例③:T8A、T10A钢制凹模,要求硬度HRC55～60,盐浴炉780℃加热,模具奥氏体化后从炉中取出,立即将湿黄泥条堵塞
First, with wet yellow mud blockage Law ①: 45 steel boring bar of various types, requiring hardness HRC40 ~ 45, salt bath furnace (or box electric furnace) 830 ℃ heating, the workpiece after austenitizing from the furnace Remove and quickly pre-prepared wet yellow mud blocks each positioning hole and screw holes, and then quenched water cooling. Quenching hardness> HRC55, tempering at 380 ℃, final hardness HRC40 ~ 43. Example ③: T8A, T10A steel concave mold, the required hardness HRC55 ~ 60, 780 ℃ heating salt bath furnace, the mold after austenization removed from the furnace, the wet yellow mud immediately blocked