A kind of manufacturing method of high temperature resistant alloy seamless pipe

A technology of high temperature resistant alloy and manufacturing method, applied in the direction of metal rolling, manufacturing tools, metal rolling, etc., can solve the problems such as the oxide scale is not easy to wash off, the cost of environmental protection treatment is increased, and the deformation resistance is large, and the inner surface can be guaranteed. The effect of quality, less product grinding and low cost

Active Publication Date: 2017-06-23
HUZHOU GAOLIN STAINLESS STEEL TUBE MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Problems that are prone to occur in production and processing: 1. Difficult to perforate, prone to cracks, and easy to peel on the surface; 2. Difficult to cold rolling, difficult to deform, and high deformation resistance; Rough, and it is easy to produce a large amount of pickling wastewater, resulting in a substantial increase in environmental protection treatment costs

Method used

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  • A kind of manufacturing method of high temperature resistant alloy seamless pipe
  • A kind of manufacturing method of high temperature resistant alloy seamless pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A method for manufacturing a high-temperature-resistant alloy seamless pipe, comprising the steps of:

[0045] Step 1, vacuum smelting, its chemical composition is calculated by weight percentage: Cr 20-23, Mo 8-10, Nb 3.15-4.15, Fe≤5, Mn≤0.5, Si≤0.5, Co<1, C<0.1, S<0.015, P<0.015, Cu<0.07, Al<0.4, Ti<0.4, the balance is Ni and unavoidable trace elements.

[0046] Step 2, casting a circular tube blank.

[0047] Step 3: Heating the circular tube blank, the heating temperature is 1083-1160°C.

[0048] From the heating furnace used to heat the round tube blank in the step 3 to the piercer for piercing the circular tube blank in the step 4, a heat preservation channel for the circular tube blank to pass is set to ensure that the circular tube blank The temperature drop between the heating and the piercing machine is less than 10 degrees.

[0049] Step 4, perforation, the perforation plug used is equipped with a lubricant injection device, which can continuously spray the...

Embodiment 2

[0058] A method for manufacturing a high-temperature-resistant alloy seamless pipe, comprising the steps of:

[0059] Step 1, vacuum smelting, its chemical composition is calculated by weight percentage: Cr 20-23, Mo 8-10, Nb 3.15-4.15, Fe≤5, Mn≤0.5, Si≤0.5, Co<1, C<0.1, S<0.015, P<0.015, Cu<0.07, Al<0.4, Ti<0.4, the balance is Ni and unavoidable trace elements.

[0060] Step 2, casting a circular tube blank.

[0061] Step 3: Heating the circular tube blank, the heating temperature is 1083-1160°C.

[0062] From the heating furnace used to heat the round tube blank in the step 3 to the piercer for piercing the circular tube blank in the step 4, a heat preservation channel for the circular tube blank to pass is set to ensure that the circular tube blank The temperature drop between the heating and the piercing machine is less than 10 degrees.

[0063] Step 4, perforation, the used perforation plug is equipped with a lubricant injection device, which can continuously spray the...

Embodiment 3

[0072] A method for manufacturing a high-temperature-resistant alloy seamless pipe, comprising the steps of:

[0073] Step 1, vacuum smelting, its chemical composition is calculated by weight percentage: Cr 20-23, Mo 8-10, Nb 3.15-4.15, Fe≤5, Mn≤0.5, Si≤0.5, Co<1, C<0.1, S<0.015, P<0.015, Cu<0.07, Al<0.4, Ti<0.4, the balance is Ni and unavoidable trace elements.

[0074] Step 2, casting a circular tube blank.

[0075] Step 3: Heating the circular tube blank, the heating temperature is 1083-1160°C.

[0076] From the heating furnace used to heat the round tube blank in the step 3 to the piercer for piercing the circular tube blank in the step 4, a heat preservation channel for the circular tube blank to pass is set to ensure that the circular tube blank The temperature drop between the heating and the piercing machine is less than 10 degrees.

[0077] Step 4, perforation, the perforation plug used is equipped with a lubricant injection device, which can continuously spray the...

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Abstract

The invention discloses a high-temperature-resistance alloy seamless pipe. The high-temperature-resistance alloy seamless pipe comprises, by weight percentage, 20-23% of Cr, 8-10% of Mo, 3.15-4.15% of Nb, smaller than or equal to 5% of Fe, smaller than or equal to 0.5% of Mn, smaller than or equal to 0.5% of Si, smaller than 1% of Co, smaller than 0.1% of C, smaller than 0.015% of S, smaller than 0.015% of P, smaller than 0.07% of Cu, smaller than 0.4% of Al, smaller than 0.4% of Ti and the balance Ni and inevitable trace elements. A manufacturing method comprises the following steps of vacuum smelting, round pipe blank casting, round pipe blank heating, perforating, first time of descaling, cold rolling, degreasing, heat treatment finishing and second time of descaling. The manufactured high-temperature-resistance alloy seamless pipe is smooth in surface, free of cracks, good in surface quality and high in size precision. The manufacturing method is short in process, easy and convenient to operate, high in efficiency and qualification rate and low in cost, especially, pickling waste water is not generated, and the environment-friendly cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of alloy seamless pipes, in particular to a method for manufacturing high-temperature resistant alloy seamless pipes. Background technique [0002] At present, most seamless pipe enterprises use cold drawing or cold rolling process to manufacture seamless steel pipes. The main production process: billet preparation → pickling and lubrication → cold rolling (drawing) → heat treatment → straightening → finishing → inspection, using cold rolling process The seamless steel pipe manufactured by the cold rolling mill is precise, and the seamless steel pipe produced by cold rolling is accurate in size. There is a lot of application force, and after heat treatment, the grain size often does not meet the requirements. Problems that are prone to occur in production and processing: 1. Difficult to perforate, prone to cracks, and easy to peel on the surface; 2. Difficult to cold rolling, difficult to deform, and high d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L9/02C22C19/05C22F1/10B21B45/08B21B25/04
CPCB21B25/04B21B45/08C22C19/055C22F1/10F16L9/02
Inventor 高伟伟沈国明胡纯潮
Owner HUZHOU GAOLIN STAINLESS STEEL TUBE MFG
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