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Solid core gas shielded welding wire for crude oil tanker cargo tank plate welding

A technology of gas shielded welding wire and cargo, applied in welding medium, welding equipment, welding/cutting medium/material, etc., can solve problems such as difference in composition design, improve corrosion resistance, good corrosion resistance, and improve H2S resistance Effects of stress corrosion

Active Publication Date: 2016-08-24
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the welding wire involved in this patent document has corrosion resistance, because the corrosion environment of the welding wire is completely different from the corrosion environment of the cargo oil tank of the crude oil tanker, there is a big difference in the concept of composition design

Method used

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  • Solid core gas shielded welding wire for crude oil tanker cargo tank plate welding
  • Solid core gas shielded welding wire for crude oil tanker cargo tank plate welding
  • Solid core gas shielded welding wire for crude oil tanker cargo tank plate welding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5

[0032] Vacuum induction furnace is used for smelting, and the mass percentage distribution of chemical elements is controlled as shown in Table 1; the welding wire with a diameter of 1.2mm is drawn by conventional technology.

[0033] Table 1. The mass percent distribution ratio of the chemical elements of Examples 1 to 5

[0034] (wt%, the balance is Fe and other unavoidable impurities)

[0035] serial number

C

Si

mn

Ti

Mo

Cr

Al / t

Cu

Ni

Example 1

0.058

0.51

0.94

0.063

0.19

0.25

0.047

0.19

0.37

Example 2

0.041

0.41

0.91

0.021

0.21

0.31

0.071

0.25

0.47

Example 3

0.091

0.36

0.82

0.043

0.02

0.36

0.052

0.75

0.25

Example 4

0.028

0.58

0.99

0.075

0.46

0.28

0.096

0.30

0.75

Example 5

0.074

0.43

0.83

0.087

0.35

0.46

0.021

0.60

0.51

[0036] The welding wire in the above-...

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Abstract

The invention discloses a solid gas protection welding wire used for welding a crude oil carrier cargo oil tank boat deck. The mass percentage ratios of the chemical elements are as follows: 0.02-0.10% of C, 0.30-0.60% of Si, 0.80-1.00% of Mn, 0.02-0.10% of Ti, 0-0.50% of Mo, 0.20-0.50% of Cr, 0.01-0.10% of Al, 0.10-0.80% of Cu, 0.10-0.80% of Ni, and the balance of Fe and other unavoidable impurities. The tensile strength of the solid gas protection welding wire used for welding the crude oil carrier cargo oil tank boat deck provided by the invention is greater than 440 MPa, and the impact work of a weld metal at 20 DEG C below zero is greater than 47 J, so that the solid gas protection welding wire has good corrosion resistance. Besides, the solid gas protection welding wire used for welding the crude oil carrier cargo oil tank boat deck and a mother board for welding have the consistent corrosion resistance and pitting resistance.

Description

technical field [0001] The invention relates to a welding material, in particular to a welding wire. Background technique [0002] At the 87th meeting of the International Maritime Organization (IMO) Maritime Safety Committee, the "Performance Standard for Protective Coatings for Cargo Tanks of Crude Oil Tankers" and "Performance Standards for Alternative Corrosion Protection Measures for Crude Oil Tankers" became the "International Maritime Mandatory requirements within the framework of the Safety of Life (SOLAS) Convention, according to the content of the above standards, the anticorrosion of cargo oil tanks of crude oil tankers can be achieved by traditional coatings, or directly using corrosion-resistant steel without coating treatment. [0003] There are differences between corrosion-resistant steel plates and ordinary marine steel plates. While strictly controlling impurity elements such as S and P, trace corrosion-resistant alloy components are added, and the requirem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30
CPCB23K35/3073
Inventor 钱伟方王怀龙曹能刘硕
Owner BAOSHAN IRON & STEEL CO LTD
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