Novel nickel-chromium-cobalt-molybdenum high-temperature alloy seamless tube for power station and manufacturing method

A technology of superalloy and manufacturing method, applied in metal rolling, metal processing equipment and other directions, can solve problems such as superalloy, and achieve the effect of small dimensional deviation, improved surface quality and dimensional accuracy, and good surface quality

Pending Publication Date: 2020-09-08
JIANGSU YINHUAN PRECISION STEEL TUBE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a nickel-chromium-cobalt-molybdenum series superalloy seamless pipe for new power stations with good structure and mechanical properties, good dimensional accuracy and surface quality and manufacturing method, to solve the manufacturing process problem of nickel-chromium-cobalt-molybdenum superalloy, so as to meet the use requirements of new power stations

Method used

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  • Novel nickel-chromium-cobalt-molybdenum high-temperature alloy seamless tube for power station and manufacturing method

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Embodiment 1

[0056] This embodiment provides a new type of nickel-chromium-cobalt-molybdenum superalloy seamless pipe for power stations. The seamless pipe includes the following components by weight percentage: C: 0.062%, Si: 0.012%, Mn: 0.03%, P: 0.005 %, S: 0.002%, Cr: 22.82%, Co: 12.95%, Al: 1.21%, Ti: 0.43%, Mo: 8.78%, Fe: 0.18%, Cu: 0.0089%, B: 0.005%, Pb: 0.001 %, Sb: 0.001%, Bi: 0.001%, Sn: 0.005%, As: 0.005%, the balance is Ni and trace elements, the sum of the above components is 100%.

[0057] The manufacturing method of above-mentioned novel power station nickel-chromium-cobalt-molybdenum superalloy seamless pipe, flow process is as follows figure 1 As shown, it specifically includes the following steps:

[0058] (1) Smelting

[0059] The alloy material of the seamless pipe adopts vacuum induction smelting, the smelting temperature is 1500°C±10°C, casting it into an alloy ingot of Ф360×2800mm, annealing at 1000~1100°C×24h×air cooling, and then vacuum self-consumption into an ...

Embodiment 2

[0089] This embodiment provides a new type of nickel-chromium-cobalt-molybdenum high-temperature alloy seamless pipe for power stations. The seamless pipe includes the following components by weight percentage: C: 0.063%, Si: 0.014%, Mn: 0.032%, P: 0.004% , S: 0.003%, Cr: 22.81%, Co: 12.93%, Al: 1.20%, Ti: 0.44%, Mo: 8.77%, Fe: 0.181%, Cu: 0.01%, B: 0.005%, Pb: 0.001% , Sb: 0.001%, Bi: 0.001%, Sn: 0.004%, As: 0.004%, the balance is Ni and trace elements, the sum of the above components is 100%.

[0090] Adopt the manufacturing method of the nickel-chromium-cobalt-molybdenum superalloy seamless pipe used in the novel power station in embodiment 1, adopt the same manufacturing method to manufacture the novel nickel-chromium-cobalt-molybdenum superalloy seamless pipe used in the power station, its inner and outer surface roughness Ra≤0.7μm; outer diameter is ±0.02mm, wall thickness is ±0.05; grain size is 5.5; mechanical properties at room temperature: R m =815MPa, R p0.2 =359M...

Embodiment 3

[0092] This embodiment provides a new type of nickel-chromium-cobalt-molybdenum high-temperature alloy seamless pipe for power stations. The seamless pipe includes the following components by weight percentage: C: 0.063%, Si: 0.014%, Mn: 0.032%, P: 0.004% , S: 0.003%, Cr: 22.81%, Co: 12.93%, Al: 1.20%, Ti: 0.44%, Mo: 8.77%, Fe: 0.181%, Cu: 0.01%, B: 0.005%, Pb: 0.001% , Sb: 0.001%, Bi: 0.001%, Sn: 0.004%, As: 0.004%, the balance is Ni and trace elements, the sum of the above components is 100%.

[0093] Adopt the manufacturing method of the nickel-chromium-cobalt-molybdenum superalloy seamless pipe used in the novel power station in embodiment 1, adopt the same manufacturing method to manufacture the novel nickel-chromium-cobalt-molybdenum superalloy seamless pipe used in the power station, its inner and outer surface roughness Ra≤0.8μm; outer diameter is ±0.04mm, wall thickness is ±0.04; grain size is 5.5; mechanical properties at room temperature: R m =818MPa, R p0.2 =356M...

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Abstract

The invention discloses a novel nickel-chromium-cobalt-molybdenum high-temperature alloy seamless tube for a power station. The novel nickel-chromium-cobalt-molybdenum high-temperature alloy seamlesstube comprises the following components in percentage by weight: 0.03-0.10% of C, less than or equal to 1.0% of Si, less than or equal to 0.70% of Mn, less than or equal to 0.012% of P, less than or equal to 0.008% of S, 20.00-24.00% of Cr, 10.00-15.00% of Co, 0.70-1.50% of Al, 0.20-0.70% of Ti, 8.00-10.00% of Mo, less than or equal to 2.00% of Fe, less than or equal to 0.5% of Cu, 0.001-0.006% ofB, less than or equal to 0.005% of Pb, less than or equal to 0.005% of Sb, less than or equal to 0.001% of Bi, less than or equal to 0.010% of Sn, less than or equal to 0.010% of As and the balance Ni and trace elements, wherein the sum of the components is 100%. According to the nickel-chromium-cobalt-molybdenum high-temperature alloy seamless tube disclosed by the invention, a certain amount ofCo, Mo, B and other elements are added by controlling and limiting the components, a smelting process adopts vacuum induction and vacuum self-consumption, a tube manufacturing process adopts hot extrusion and full cold rolling, and finally solution treatment is performed; and by adopting the way, the alloy seamless tube has good structure stability, mechanical properties and process properties and can meet the using requirements of a heat exchange tube for the novel power station.

Description

technical field [0001] The invention relates to a nickel-chromium-cobalt-molybdenum high-temperature alloy seamless pipe, in particular to a high-temperature alloy seamless pipe used for a new type of power station heat transfer pipe. Background technique [0002] The emission of greenhouse gases is a topic that has received great attention from all countries in recent years. The system of traditional power plants to increase the recovery of emissions is also very complicated and expensive, and will greatly increase the cost of power generation. New technologies that can provide cheap, clean and flexible sources of electricity to the grid will be easier to adjust to demand than standard solar and wind farms. The Allam cycle technology, named after the British engineer Rodney Allam, abandons the traditional thermal power CO 2 Combustion, does not use steam to drive the generator, but uses pressurization to make CO 2 In a supercritical state, the generator's turbine spins at...

Claims

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Application Information

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IPC IPC(8): C22C19/05C22C30/00C22C30/02C22C30/04C22F1/10B21C37/06
CPCC22C19/055C22C30/00C22C30/02C22C30/04C22F1/10B21C37/06B21B1/02B21J5/12B21C23/085C21D8/021C21D8/0273C21D8/0236C23G1/02B21D19/005
Inventor 高佩汤云飞赵佳敏
Owner JIANGSU YINHUAN PRECISION STEEL TUBE CO LTD
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