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Method for manufacturing test piece of hgdrogen induced cracking (HIC) and sulfide stress cracking (SSC) of welding material melting laid metal

A technology of deposited metal and stress cracking, which is applied in the preparation of test samples, metal processing equipment, welding equipment, etc., can solve the problems of meeting actual requirements and the inability of sulfur-resistant welding materials to pass the sulfur-resistant performance.

Active Publication Date: 2011-05-11
SINOPEC TENTH CONSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: to overcome the problem that the anti-sulfur welding material in the prior art cannot be determined through the corrosion resistance test whether its anti-sulfur performance can meet the actual requirements, according to the anti-hydrogen-induced cracking HIC and sulfide The mechanism of material stress cracking SSC, combined with conventional sulfur-resistant pipes and plate materials, the preparation method of hydrogen-induced cracking HIC and sulfide stress cracking SSC test pieces of welding consumables

Method used

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  • Method for manufacturing test piece of hgdrogen induced cracking (HIC) and sulfide stress cracking (SSC) of welding material melting laid metal
  • Method for manufacturing test piece of hgdrogen induced cracking (HIC) and sulfide stress cracking (SSC) of welding material melting laid metal
  • Method for manufacturing test piece of hgdrogen induced cracking (HIC) and sulfide stress cracking (SSC) of welding material melting laid metal

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Step 1: Selection of surfacing test plate

[0034] see figure 1 :

[0035] In order to ensure that there is no obvious deformation of the test plate during the surfacing process, which will affect the mechanical properties of the deposited metal of the welding consumables, and at the same time avoid excessive impurity elements from being mixed into the deposited metal of the welding consumables, the material of the test plate selected for surfacing welding is tensile The strength is not lower than 490MPa, and the specification is 300×200×30mm low-alloy material 16MnR.

[0036] Step 2: Selection of surfacing welding method

[0037] In order to reduce the stress and deformation generated during the welding process and reduce the influence of welding deformation on the mechanical properties of the welded metal deposition, the surfacing welding is carried out by symmetrical welding on both sides of the test plate, that is, the first layer of weld bead 1 is welded on the f...

Embodiment 2

[0053] Step 1-3: same as embodiment 1.

[0054] Step 4: In order to ensure that the prepared sample can fully reflect the performance of the welding consumable itself, each side of the surfacing welding bead generally maintains 10 layers. The thickness of the welding consumable deposited metal of the surfacing welding is 21mm, the width is 165mm, and the length is 185mm.

[0055] All the other are with embodiment 1.

Embodiment 3

[0057] Step 1-3: same as embodiment 1.

[0058] Step 4: In order to ensure that the prepared samples can fully reflect the performance of the welding consumable itself, each side of the surfacing welding bead generally maintains 12 layers. The thickness of the welding consumable deposited metal of the surfacing welding is 22mm, the width is 170mm, and the length is 190mm.

[0059] All the other are with embodiment 1.

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Abstract

The invention relates to a method for manufacturing a test piece of hgdrogen induced cracking (HIC) and sulfide stress cracking (SSC) of welding material melting laid metal, belonging to the fields of preparation and property evaluation of a sulfur resistant welding material corrosion resistance detection test piece for a high-sulphur-content (hydrogen sulfide) gas field. The method comprises the following steps of: selecting a low-alloy steel plate with a certain thickness as an overlaying test plate; thoroughly cleaning the surface of the steel plate before welding; preheating the steel plate to 100-150 DEG C; overlaying on the steel plate by adopting a symmetrical welding method, wherein 8-12 layers of welding beads are needed to be welded on each side of the test plate, the welding directions of the welding beads on the same layer are consistent, the welding directions of the welding beads on the upper layer are opposite to those on the lower layer, and the thickness of the melting laid metal is 20-22mm; cleaning a melting laid metal surface layer with higher impurity content on the surface of the melting laid metal; and cutting and sampling according to the same standard. In the invention, through detecting and analyzing the test piece, the method can be used for accurately and objectively judging whether the welded material can adapt to the welding of a pipeline in a high sulphur content state or not.

Description

technical field [0001] The invention discloses a method for preparing welded metal hydrogen-induced cracking HIC and sulfide stress cracking SSC test pieces, belonging to the field of preparation and performance evaluation of test pieces for corrosion resistance of sulfur-resistant welding materials used in high-sulfur (hydrogen sulfide) natural gas fields. Background technique [0002] At present, the main means used to evaluate the corrosion resistance of sulfur-resistant materials are: according to NACETM0284-2005 (test method for evaluation of hydrogen-induced cracking resistance of steel for pipelines and pressure vessels) and NACETM0177-2005 (H 2 Laboratory test method for metal resistance to sulfide stress corrosion cracking and stress corrosion cracking in S environment) Standards for anti-sulfur materials Conduct hydrogen-induced cracking HIC and sulfide stress cracking SSC tests with standard liquids, and pass these two tests as the standard To determine the sulfur...

Claims

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Application Information

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IPC IPC(8): G01N1/28G01N17/00B23K31/12
Inventor 魏家斌吴忠宪陈茂斌唐元生左静
Owner SINOPEC TENTH CONSTR
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