High alloy tube piercing plug material and manufacturing method and surface processing method thereof

Abstract

The invention relates to a high alloy tube piercing plug material which is characterized by comprising the following components in percentage by weight: 0.16 to 0.4 percent of C, 0.6 to 1.2 percent of Si, 0.4 to 1.2 percent of Mn, 0.5 to 2 percent of Cr, 2 to 5 percent of Ni, 0.6 to 1.6 percent of Mo, 0.5 to 2.5 percent of W, 0.8 to 1.2 percent of Co, 0.3 to 0.6 percent of Nb, 0.3 to 0.6 percent of V, less than or equal to 0.01 percent of S, less than or equal to 0.01 percent of P and the balance of iron and unavoidable trace impurities. A piercing plug made by utilizing the high alloy tube piercing plug material and a surface processing method thereof which are disclosed by the invention, has the characteristics of long service life, moderate cost and good piercing effect.

Description

Technical field [0001] The present invention involves the field of alloy materials, especially a high -alloy piping top material and its surface treatment method. Background technique [0002] During the formation of seamless steel pipes, the top of the perforation is the top priority of the mold tool. During the perforation process, high -temperature billets must bear the role of squeezing and rapid expansion and deformation from various aspects.The working conditions are extremely harsh, especially when wearing a high -alloy pipe, it has good toughness itself. Generally, the traditional price and expensive general molybdenum top can be selected.The industry's technicians know that the molybdenum top is high to resist, and during the perforation process, the top head itself does not need to cool down and can be continuously worn.Such high -alloy steels to be perforated cannot be exposed to water at the surface at high temperatures, otherwise the quality of the products of the pi...

AI Technical Summary

Problems solved by technology

However, this kind of plug needs to be cooled with water in the inner cavity, otherwise only 1-2 plugs can be worn, and the nose of the plug will collapse, the rolling strip will stick to steel, and the flesh will fall seriously, which will cause the tube blank material to be scrapped.

Chinese patent ZL200910000886.9 discloses a new material for hot piercing plugs of steel pipes. Because the content of MO and W elements is increased in the material, and an appropriate amount of AL and rare earth elements CE are added at the same time, the strength, wear resistance, and wear resistance of the material are improved. Hardness, plasticity and thermal stability effectively overcome the shortcomings of the prior art and reduce the cost. However, due to the complexity of the material types, it is difficult to control the content during production, and the required elements are not usually easy to obtain. The production cost high, room for improvement

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