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Alloy material flange and forging technology thereof

A technology of alloy material and flange, which is applied in the field of alloy material flange and its forging process, can solve the problems of sealing surface processing size error, inability to solve on-site solutions, enterprise shutdown and production shutdown, etc., to achieve good mechanical properties, improve room temperature and high temperature Mechanical properties, effect of eliminating shrinkage cavity

Active Publication Date: 2014-08-27
WUXI HUAERTAI MACHINERY MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the error of the processing size of the sealing surface, the aging of the sealing element and improper installation and fastening, it is easy to cause leakage of the flange.
If the flange leakage problem cannot be dealt with in time, the leakage will expand rapidly under the scouring of the medium, resulting in the loss of materials, the destruction of the production environment, and the shutdown of the enterprise, resulting in huge economic losses.
Leakage of toxic, harmful, flammable and explosive media may cause serious accidents such as personnel poisoning, fire and explosion
[0003] The traditional solution to flange leakage is to replace sealing elements and apply sealant, or replace flanges and pipes, but this method has great limitations, and some leakage is limited by the requirements of working environment safety, so it cannot be solved on site

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] This embodiment provides a flange made of alloy material. The chemical composition of the selected alloy blank is: 12.7% nickel, 25.3% chromium, 0.1% carbon, 0.17% silicon, 0.72% manganese, 0.0015% sulfur, 2.25% molybdenum, titanium 3.25%, aluminum 3%, copper 1.25%, phosphorus 0.015%, tungsten 0.9%, boron 0.018%, niobium 0.9%, rare earth elements 0.11%, the rest is Fe and impurities; the rare earth elements include ytterbium 12%, erbium 6% , dysprosium 19%, gadolinium 26%, cerium 8%, lanthanum 14% and thorium 15%.

[0030] This embodiment also provides a forging process of an alloy material flange, including the following specific steps:

[0031] Step (1): first use a chemical analysis instrument to chemically analyze the alloy billet to ensure that its chemical composition meets the composition requirements of the above alloy materials;

[0032] Step (2): After the analysis of step (1) is qualified, a 5000Kg alloy billet is selected, and electric furnace is used for s...

Embodiment 2

[0041] This embodiment provides a flange made of alloy material. The chemical composition of the selected alloy blank is: 12.9% nickel, 25.5% chromium, 0.12% carbon, 0.19% silicon, 0.79% manganese, 0.0035% sulfur, 2.35% molybdenum, titanium 3.45%, aluminum 3.25%, copper 1.85%, phosphorus 0.017%, tungsten 1.1%, boron 0.022%, niobium 1.1%, rare earth elements 0.13%, the rest is Fe and impurities; the rare earth elements include ytterbium 12%, erbium 11% , dysprosium 19%, gadolinium 16%, cerium 8%, lanthanum 18% and thorium 16%.

[0042] This embodiment also provides a forging process of an alloy material flange, including the following specific steps:

[0043] Step (1): first use a chemical analysis instrument to chemically analyze the alloy billet to ensure that its chemical composition meets the composition requirements of the above alloy materials;

[0044] Step (2): After the analysis of step (1) is qualified, the alloy billet below 4800Kg is selected, and the electric furn...

Embodiment 3

[0053] This embodiment provides a kind of alloy material flange, selects the weight percentage chemical composition of alloy billet to be: nickel 12.8%, chromium 25.4%, carbon 0.11%, silicon 0.18%, manganese 0.76%, sulfur 0.0025%, molybdenum 2.30%, titanium 3.35%, aluminum 3.15%, copper 1.55%, phosphorus 0.016%, tungsten 1.0%, boron 0.020%, niobium 1.0%, rare earth elements 0.12%, the rest is Fe and impurities; the rare earth elements include ytterbium 12%, erbium 8% , dysprosium 21%, gadolinium 16%, cerium 8%, lanthanum 13% and thorium 22%.

[0054] This embodiment also provides a forging process of an alloy material flange, including the following specific steps:

[0055] Step (1): first use a chemical analysis instrument to chemically analyze the alloy billet to ensure that its chemical composition meets the composition requirements of the above alloy materials;

[0056] Step (2): After the analysis in step (1) is qualified, select an alloy billet below 4600Kg, use an elec...

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PUM

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Abstract

The invention discloses an alloy material flange and a forging technology thereof. An alloy blank of the alloy material flange comprises, by weight, 12.7-12.9% of Ni, 25.3-25.5% of Cr, 0.1-0.12% of C, 0.17-0.19% of Si, 0.72-0.79% of Mn, 0.0015-0.0035% of S, 2.25-2.35% of Mo, 3.25-3.45% of Ti, 3-3.25% of Al, 1.25- 1.85% of Cu, 0.015-0.017% of P, 0.9-1.1% of W, 0.018-0.022% of B, 0.9-1.1% of Nb, 0.11-0.13% of rare earth elements and the balance Fe and impurities. The rare earth elements comprise 12-18% of Yb, 6-11% of Er, 19-25% of Dy, 16-26% of Gd, 8-17% of Ce, 13-18% of La and 15-22% of Th. Through raw material chemical analysis, forging temperature and forging ratio control, solid solution treatment after forging, heat treatment and structure hardening treatment after heat treatment, the forge piece can be used under the conditions of high sulphur and phosphorus content and has good mechanical properties. The alloy material has excellent stress corrosion cracking resistance, pitting corrosion resistance and crevice corrosion resistance, has good oxidizing and non-oxidizing hot acid resistance and has stable mechanical properties in a range of a room temperature to a high temperature of 550 DEG C.

Description

technical field [0001] The invention belongs to the field of material processing, and relates to forging processing of alloy materials, in particular to an alloy material flange and a forging process thereof. Background technique [0002] In the continuous production of modern industry, especially in the petrochemical industry, under the action of high temperature and high pressure, flanges are affected by factors such as medium corrosion, erosion, temperature, pressure, vibration, etc., and leakage problems will inevitably occur. Due to the error of the processing size of the sealing surface, the aging of the sealing element and improper installation and fastening, it is easy to cause leakage of the flange. If the flange leakage problem cannot be dealt with in time, the leakage will expand rapidly under the scouring of the medium, resulting in the loss of materials, the destruction of the production environment, and the shutdown of the enterprise, resulting in huge economic...

Claims

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Application Information

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IPC IPC(8): C22C38/54C21D9/00B21J5/00
Inventor 李忠云
Owner WUXI HUAERTAI MACHINERY MFG
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