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发明公开
CN104988416A 一种高合金钢管穿孔顶头及其制造方法 无效 - 撤回

一种高合金钢管穿孔顶头及其制造方法
摘要：
本发明公开了一种高合金钢管穿孔顶头，其化学元素质量百分比含量为：C：0.25～0.35％，Si：0.35～1.5％，Mn：0.35～1.0％，Cr：1.0～3.0％，Mo：2.0～3.0％，Ni：1.0～2.0％，W：1.5～2.5％，V：0.2～1.0％，余量为Fe和其他不可避免的杂质；该高合金钢管穿孔顶头的表面具有氧化膜；该高合金钢管穿孔顶头的外表面具有螺道。本发明还公开了一种穿孔顶头的制造方法，该制造方法包括步骤：制造顶头毛坯；退火；机械加工钢管穿孔顶头并在其表面加工出螺道；表面高温氧化处理以形成氧化膜。本发明所述的穿孔顶头具有较高的高温强度和较好的韧性。该穿孔顶头表面的氧化膜的附着力好。
摘要（英）：

The invention discloses a high-alloy steel pipe piercing plug. The high-alloy steel pipe piercing plug comprises the following chemical elements in percentage by mass: 0.25-0.35% of C, 0.35-1.5% of Si, 0.35-1.0% of Mn, 1.0-3.0% of Cr, 2.0-3.0% of Mo, 1.0-2.0% of Ni, 1.5-2.5% of W, 0.2-1.0% of V, and the balance of Fe and inevitable impurities; the surface of the high-alloy steel pipe piercing plug has an oxide film; and the outer surface of the high-alloy steel pipe piercing plug has a screw way. The invention further discloses a manufacturing method of the piercing plug; and the manufacturing method comprises the step of: manufacturing of a plug blank; annealing; machining of the steel pipe piercing plug and machining of the screw way on the surface of the plug; and formation of the oxide film through the surface high-temperature oxidation treatment. The piercing plug is higher in high-temperature strength and better in toughness. The oxide film on the surface of the piercing plug is excellent in adhesive force.

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