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Stainless steel composite plate for petroleum and natural gas conveying pipeline and preparing method of stainless steel composite plate

A technology for oil and natural gas and transportation pipelines, which is applied in the field of stainless steel clad plates for oil and natural gas transportation pipes and its preparation, can solve the problems of low rolling power, cracks, differences in thermal expansion coefficients, etc. The effect of improving finish rolling temperature and excellent corrosion resistance

Inactive Publication Date: 2019-04-16
NANJING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large difference in the thermal expansion coefficients of stainless steel and carbon steel in this method, the welding seam between stainless steel and carbon steel is easy to crack due to the difference in expansion during the heating process, and the rolling success rate is not very high.

Method used

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  • Stainless steel composite plate for petroleum and natural gas conveying pipeline and preparing method of stainless steel composite plate
  • Stainless steel composite plate for petroleum and natural gas conveying pipeline and preparing method of stainless steel composite plate
  • Stainless steel composite plate for petroleum and natural gas conveying pipeline and preparing method of stainless steel composite plate

Examples

Experimental program
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Effect test

preparation example Construction

[0038] The preparation method of the stainless steel clad plate for the oil and gas transmission pipeline of Examples 1-5, the specific process parameters of each embodiment are shown in Table 3, and specifically include the following steps:

[0039] (1) Blank preparation: According to the variety and specification of the finished composite board, prepare the base material and cladding material blank, and polish the surface of the base material and cladding material blank to be compounded, remove the rust layer and oxide layer on the surface of the blank, and make the surface completely exposing fresh metal;

[0040](2) Release agent brushing: Apply release agent to the non-composite surface of the cladding material to ensure that the release agent is evenly brushed on the surface of the cladding material, and then dry the release agent;

[0041] (3) Composite billet preparation: Spot-weld the seal on the periphery of one of the base materials to be compounded. The height of t...

Embodiment 1

[0050] The structural and performance parameters of the composite boards in Examples 1-5 are specifically shown in Table 4. The composite boards have excellent tensile, impact, bending, shear strength and intergranular corrosion resistance. figure 1 and figure 2 It is a photo of the composite interface microstructure of the composite plate in Example 1 and the microstructure of the base material. It can be seen from the figure that the composite plate achieves good metallurgical bonding, and the structure of the base material is bainite + proeutectoid ferrite.

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Abstract

The invention discloses a stainless steel composite plate for a petroleum and natural gas conveying pipeline. The stainless steel composite plate comprises a base material and a covering material, andthe covering material is metallurgically bonded to the base material and made of austenitic stainless steel; the base material is prepared from, by weight, 0.03-0.09% of C, 0.2-0.4% of Si, 1.00-1.70%of Mn, 0-0.02% of P, 0-0.01% of S, 0.015-0.050% of Alt, 0.020-0.090% of Nb, 0-0.05% of V, 0.006-0.030% of Ti, 0.10-0.30% of Cr, 0-0.30% of Ni, 0-0.10% of Mo, 0-0.30% of Cu, 0-0.001% of B and the balance Fe and a few unavoidable impurities. The invention further provides a preparing method of the stainless steel composite plate for the petroleum and natural gas conveying pipeline. The preparing method is simple, feasible and low in cost; the prepared composite plate has good corrosion resistance and strong toughness, a compound interface is straighter, the thickness of the covering material ismore uniform, the surface quality is better, and the stainless steel composite plate can be directly used without annealing heat treatment.

Description

technical field [0001] The invention belongs to the field of bimetallic composite plates and its manufacturing technology, and in particular relates to a stainless steel composite plate for oil and gas pipelines and a preparation method thereof. Background technique [0002] With the continuous progress of the oil and gas industry, the world's energy demand is increasing, and the oil and natural gas resources that are easy to exploit are becoming less and less. In order to meet the demand for oil and gas in the development of global industrialization, the exploration and development of oil and gas fields are gradually developing in areas with harsher environmental conditions. In recent years, high CO 2 , high Cl content -1 , high H 2 Oil and gas fields such as S, high temperature, high pressure and elemental sulfur continue to appear. in high H 2 S, Cl -1 , CO 2 In harsh environments with high corrosiveness, the corrosion of oil and gas well casings and gathering pipe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B15/01B32B15/18B23K28/02
CPCB23K28/02B32B15/011B32B2307/558B32B2307/714B32B2597/00
Inventor 曾周燏江姗党军孙龙凤李东晖
Owner NANJING IRON & STEEL CO LTD
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