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Processing method of nickel and nickel alloy tubular products

A processing technology, nickel alloy technology, applied in the field of processing technology of nickel and nickel alloy pipes

Inactive Publication Date: 2014-05-21
高玉树
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a processing method for nickel and nickel alloy pipes, which solves the practical application technical problems of nickel and nickel alloy pipes. Stable and reliable

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] Embodiment 1. The pure nickel N6 tube of Ф25x1x6000 is produced. Cut the standard electrolytic nickel plate into several pieces suitable for vacuum furnace melting, put enough small pieces of electrolytic nickel material into the crucible of the vacuum melting furnace, and prepare 10 to 20 sets of graphite molds in the vacuum tank, close the Install the vacuum furnace, turn on the vacuum pump for vacuuming until the vacuum in the furnace reaches the range of 2-10Pa, then start the heating system to raise the temperature of the furnace body to 2550°C ± 100°C to melt the nickel metal in the crucible, the melting time is 2.5- After 3 hours of smelting, inject the molten nickel water into each graphite mold respectively, turn off the heating control system, let the ingot in the mold cool down to below 200°C with the furnace, and remove each graphite mold to obtain a round rod ingot of Ф200x500. Use a lathe to remove the rough surface of the 2mm round bar ingot skin and dril...

Embodiment 2

[0008] Embodiment 2. Production of Monel alloy pipe (NCu28-2.5-1.5) of Ф17x0.9x2000. Cut the standard electrolytic nickel plate and electrolytic copper plate into several pieces suitable for vacuum furnace smelting, and add sufficient and appropriate small pieces of electrolytic nickel material, electrolytic copper material and manganese and iron raw materials that meet the material content requirements into the vacuum melting furnace crucible and prepare 10-20 sets of graphite molds in the vacuum tank, close the vacuum furnace tank, turn on the vacuum pump for vacuuming until the vacuum degree in the furnace reaches the range of 2-10Pa, and then start the heating system to raise the temperature of the furnace body to The nickel metal in the crucible is smelted at 2500°C±100°C. The smelting time is 2.5 to 3 hours. After smelting, the molten nickel alloy water is injected into each graphite mould, and the heating control system is turned off to let the ingot in the mould. Cool ...

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Abstract

The invention provides a processing method of nickel and nickel alloy tubular products, and belongs to the field of material processing. The processing method comprises following steps: a prepared raw material is subjected to melting in a vacuum melting furnace at a temperature of 2150 to 2750 DEG C; the melted raw material is injected into a graphite mould so as to obtain round rod-shaped ingot casting; the round rod-shaped ingot casting is cooled, is subjected to outer surface lathing so as to remove an outer rough layer, and is provided with a central hole along the central axis; the round rod-shaped ingot casting provided with the central hole is heated to a temperature of 800 to 1250 DEG C, and the temperature is maintained so as to realize complete roasting; the roasted round rod-shaped ingot casting is delivered into a large-tonnage extruding machine so as to obtain tube blank via extruding; the obtained tube blank is subjected to a plurality of times of oil removing and grease removing, vacuum annealing at a temperature of 550 to 950 DEG C, and rolling according to practically needed tubular product specification until the quality of an obtained product is close to demands on the finished tubular products; the obtained product is subjected to a last time of rolling or drawing so as to achieve practical dimensional precision, and then is subjected to straightening; the rolled head and the tail end of a straightened tubular product are cut off using a lathe; and then the tubular product is subjected to deburring and cleaning. The processing method is simple; yield is high; and quality of the prepared tubular products is stable and reliable.

Description

technical field [0001] The invention relates to a processing method for metal pipes, in particular to a processing method for nickel and nickel alloy pipes. Background technique [0002] Nickel and nickel-based nickel alloy pipes are widely used in aerospace, shipbuilding, marine engineering, military nuclear power, petroleum and petrochemical industries, biopharmaceuticals and many other fields. Nickel and nickel alloy pipes have high mechanical properties, excellent elongation plastic processing and good cutting performance, and have very strong corrosion resistance to seawater, sulfuric acid, caustic alkali, most organic acids, etc., and are high-end industrial equipment. Indispensable raw materials for corrosion-resistant pipe selection. Due to the unique high content of nickel-based elements, the processing technology of nickel and nickel alloy pipes is quite different from that of ordinary metal pipes. Reliable and high quality nickel pipe with very low yield. Cont...

Claims

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Application Information

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IPC IPC(8): B21C23/01B21C23/08C22F1/10C21D8/10
Inventor 高玉树
Owner 高玉树
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