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Low-hydrogen basic welding rod for welding 1Ni9 steel and preparation method thereof

A basic electrode and welding core technology, applied in welding equipment, welding medium, welding/cutting medium/material, etc., can solve the problems of high nickel content in the electrode and poor process performance, and achieve good arc stability and meet engineering requirements. Requirements, beautiful effect of welding seam forming

Inactive Publication Date: 2015-06-24
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of this invention is to provide a low-hydrogen basic electrode for welding 1Ni9 steel, which solves the problems of high nickel content and poor processability of existing electrodes

Method used

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  • Low-hydrogen basic welding rod for welding 1Ni9 steel and preparation method thereof
  • Low-hydrogen basic welding rod for welding 1Ni9 steel and preparation method thereof
  • Low-hydrogen basic welding rod for welding 1Ni9 steel and preparation method thereof

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preparation example Construction

[0016] The preparation method of above-mentioned low-hydrogen alkaline electrode, concrete steps are as follows:

[0017] Step 1, weigh 34-48% of marble, 20-27% of fluorite, 2-8% of quartz, 4-5% of zircon sand, 3-10% of rutile, 1-3% of titanium dioxide, ferrosilicon 2 to 5%, rare earth ferrosilicon 1 to 3%, ferrosilicon 4 to 11%, medium carbon ferromanganese 2 to 8%, synthetic mica 1 to 3%, soda ash 1 to 2%, the sum of the weight percentages of each component is 100%; put the above powder materials and binder together into the mixer and mix for 10-20 minutes, then press the mixed powder into a cylindrical powder in the compactor; the binder is the modulus m= 3 sodium water glass, the weight ratio of drug skin to sodium water glass is 2.8~3.8:1;

[0018] Step 2, select UPT7013Mo or OK92.55 welding core, and place it on the wire feeding table of the press-coating machine, put the cylindrical powder ball prepared in step 1 into the press-coating machine, run the press-coating ma...

Embodiment 1

[0032] Step 1, weigh 350g marble, 230g fluorite, 55g quartz, 40g rutile, 12g titanium dioxide, 40g zircon sand, 45g ferrosilicon, 26g rare earth ferrosilicon, 104g ferrotitanium, 78g medium carbon ferromanganese, 10g synthesis Mica, 10g soda ash, put the above-mentioned medicinal powder material and 350g sodium water glass together in a mixer and mix for 15min, then put the mixed medicinal powder into a compactor and press into a cylindrical powder group;

[0033] Step 2, select UPT7013Mo welding core, and place it on the wire feeder of the press-coating machine, put the cylindrical powder ball prepared in step 1 into the press-coating machine, run the press-coating machine to make welding rod, and put the prepared After grinding the head and tail of the welding rod, put it into the box dryer, and dry it according to 60℃×8h+120℃×1h+180℃×1h+250℃×1h+350℃×1.5h, and then it will be used for welding Low hydrogen alkaline electrode for 1Ni9 steel.

[0034] Use the low-hydrogen basi...

Embodiment 2

[0040] Step 1, weigh 380g marble, 200g fluorite, 50g quartz, 55g rutile, 19g titanium dioxide, 50g zircon sand, 41g ferrosilicon, 21g rare earth ferrosilicon, 84g ferrotitanium, 60g medium carbon ferromanganese, 20g synthetic mica , 20g soda ash, the above-mentioned medicinal powder material and 350g sodium water glass are put into the mixing machine and mix 10min together, then the medicinal powder after mixing is put into a compactor and pressed into a cylindrical powder group;

[0041] Step 2, select the OK92.55 welding core, and place it on the wire feeder of the press-coating machine, put the cylindrical powder ball prepared in step 1 into the press-coating machine, run the press-coating machine to make welding rods, and put the Put the good welding rod into the box dryer after grinding the head and tail, and dry it according to 60℃×8h+120℃×1h+180℃×1h+250℃×1h+350℃×1.5h, and then you can get the used Low-hydrogen basic electrode for welding 1Ni9 steel.

[0042] The 1Ni9 s...

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Abstract

The invention discloses a low-hydrogen basic welding rod for welding 1Ni9 steel. The low-hydrogen basic welding rod comprises a coating and a welding core; the coating consists of the following materials according to a weight ratio of: 34-48% of marble, 20-27% of fluorite, 2-8% of quartz, 4-5% of zircon sand, 3-10% of rutile, 1-3% of titanium dioxide, 2-5% of ferrosilicon, 1-3% of rare earth ferrosilicon, 4-11% of ferrotitanium, 2-8% of mid-carbon ferromanganese, 1-3% of synthetic mica, and 1-2% of sodium carbonate; and the sum of the weight percentages of the components is 100%. The invention further discloses a preparation method of the low-hydrogen basic welding rod, comprising the following steps of: mixing powder with a binding agent and then pressing a mixture into a cylindrical powder cluster; placing the cylindrical powder cluster in a press; placing the welding core on a wire feeding table of the press; operating the press to manufacture the welding rod; and grinding the head and the tail and then gradually heating and drying, so as to obtain the low-hydrogen basic welding rod. According to the low-hydrogen basic welding rod provided by the invention, the content of diffusible hydrogen in weld metal is low, so that the requirement on the low-hydrogen content can be met; the rigidity under a liquid nitrogen temperature is better; and the engineering requirements can be met.

Description

technical field [0001] The invention belongs to the technical field of material processing, and in particular relates to a low-hydrogen basic electrode for welding 1Ni9 steel, and also relates to a preparation method of the low-hydrogen basic electrode. Background technique [0002] 1Ni9 steel is an excellent ultra-low-temperature low-carbon steel invented by INCO Company of the United States, also known as 9%Ni steel. It is a low-carbon quenched and tempered martensitic low-temperature steel. Weldability, compared with stainless steel, has less alloy content and is cheaper; compared with low-temperature aluminum alloys, it has larger allowable stress and lower thermal expansion rate, and is considered to be an excellent material for manufacturing fan impellers that serve at low temperatures. At present, the commonly used welding materials that match 1Ni9 steel include ENiCrMo-3, ENiCrMo-6 and other nickel-based electrodes. The production technology of these welding material...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/365B23K35/40
Inventor 张敏吴伟刚李继红
Owner XIAN UNIV OF TECH
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