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High-strength and high ductility-roughness sandy water erosion resisting clean martensitic stainless steel alkaline welding electrode and preparation method thereof

A martensitic stainless steel, plastic toughness technology, used in welding equipment, welding media, manufacturing tools, etc., can solve the problems of corrosion, falling off, and mud resistance, and achieve excellent mechanical operation.

Active Publication Date: 2018-05-01
ATLANTIC CHINA WELDING CONSUMABLES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But above-mentioned three patents are used for the welding of water turbine unit, there is following defect: 1. chrome-molybdenum hydrogen steel is welded water turbine unit with low-alloy steel manual welding rod, there is following defect: not resistant to mud sand stone grinding and not resistant to corrosion such as mud water; ② 1Ni9 steel low-hydrogen basic welding rod welding water turbine unit has the following defects: it is not resistant to corrosion such as mud, sand and stone grinding; It will fall off in blocks under the washing of water, mud and sand, which may cause serious quality accidents

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Take 100kg of nickel alloy welding core, the welding core composition is (wt%): C: 0.015%, Mn: 0.23%, Si: 0.18%, Cr: 12.01%, Ni: 4.32%, Cu: 0.011%, S: 0.016% , P: 0.015%, the balance is Fe and essential impurities.

[0041] Take the drug skin, the weight of each component in the drug skin is as follows: 7.0kg of marble containing 98.40% of CaCO3; 11.0kg of fluorite containing 97.30% of CaF2; 1.6kg of rare earth fluoride containing REO84.2%; 4.0kg of silicate; 2.0kg of electrolytic manganese containing Mn99.5%; 2.0kg of ferrotitanium containing 30.1% of Ti; 2.0kg of ferrosilicon containing 45.2% of Si; 5.0kg of iron powder containing Fe98.2%; containing Cr66 .3% ferrochrome 4.5kg; nickel powder containing Ni99.7% 1kg; molybdenum ferromolybdenum containing 56.5% 2.0kg; soda ash containing NaCl0.31% 0.6kg.

[0042] After stirring and mixing the above powder evenly, add 6.5 kg of potassium sodium water glass with a concentration of 40°Be"~42°Be" and mix evenly, then send i...

Embodiment 2

[0046] This embodiment is all the same as Example 1 except that the weights of the ingredients in the drug skin are different.

[0047] The weight of each component in the drug skin in the present embodiment is as follows: 11.0kg of marble containing 98.40% of CaCO; 8.0kg of fluorite containing 97.30% of CaF; 2.0kg of fluorinated rare earth containing REO84.2%; 2.4kg of salt; 1.6kg of electrolytic manganese containing Mn99.5%; 3.0kg of ferrotitanium containing 30.1% of Ti; 3.0kg of ferrosilicon containing 45.2% of Si; 5.6kg of Cr66.3% ferrochrome; 2.0kg of Ni99.7% nickel powder; 2.8kg of Mo56.5% ferromolybdenum; 0.8kg of NaCl0.31% soda ash.

[0048] The obtained high-strength, high-plasticity, sand-water erosion-resistant and clean martensitic stainless steel alkaline electrode 2 for the welded joints of the hydraulic turbine unit was subjected to welding experiments. The deposited metal composition: C: 0.033%, Mn: 0.49 %, Si: 0.29%, Cr: 12.45%, Ni: 4.91%, Mo: 0.57%, Cu: 0.00...

Embodiment 3

[0051] This embodiment is all the same as Example 1 except that the weights of the ingredients in the drug skin are different.

[0052] The weight of each component in the drug skin in the present embodiment is as follows: 9.0kg of marble containing 98.40% of CaCO; 10.0kg of fluorite containing 97.30% of CaF; 0.4kg of fluorinated rare earth containing REO84.2%; 5.0kg of salt; 2.0kg of electrolytic manganese containing Mn99.5%; 1.6kg of ferrosilicon containing Ti30.1%; 2.4kg of ferrosilicon containing Si45.2%; 4.0kg of iron powder containing Fe98.2%; 4.2kg of Cr66.3% ferrochrome; 1.2kg of Ni99.7% nickel powder; 2.0kg of Mo56.5% ferromolybdenum; 0.4kg of NaCl0.31% soda ash.

[0053] The obtained high-strength, high-plasticity, sand-water erosion-resistant and clean martensitic stainless steel alkaline electrode 3 for the welded joints of the hydraulic turbine unit was subjected to welding experiments, and the deposited metal composition: C: 0.031%, Mn: 0.55 %, Si: 0.35%, Cr: 12...

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Abstract

The invention discloses a high-strength and high ductility-roughness sandy water erosion resisting clean martensitic stainless steel alkaline welding electrode and a preparation method thereof. The high-strength and high ductility-roughness sandy water erosion resisting clean martensitic stainless steel alkaline welding electrode comprises a chrome-nickel alloy core wire and a coating wrapping thesurface of the core wire. The coating comprises the following components, by weight, of 7-11 parts of marble, 8-11 parts of fluorite, 0.4-2 parts of rare earth fluoride, 2-5 parts of silicate, 0.4-2parts of electrolytic manganese, 1-3 parts of ferrotitanium, 1-3 parts of ferrosilicon, 4-6 parts of ferrous powder, 3-5.6 parts of ferrochromium, 0-2 parts of nickel powder, 1.6-3.0 parts of ferromolybdenum and 0.4-1.0 part of sodium carbonate. When the high-strength and high ductility-roughness sandy water erosion resisting clean martensitic stainless steel alkaline welding electrode is welded,an electric arc is stable, splashing is little, the fluidity of slag is good, the deslagging effect is good, a formed weld joint is attractive, and operability in the full position is good. The mechanical properties, such as tensile strength (Rm), yield strength (Rp0.2), the after-fracture elongation (A) and impact energy (KV) at the temperature of 0 DEG C, of welding deposited metal are excellentunder the heat treatment state and the normal-temperature condition, especially, impact absorbed energy at the temperature of 0 DEG C reaches 70 J or above under the situation that the strength is larger than 850 MPa.

Description

technical field [0001] The invention relates to the field of welding materials, in particular to a clean martensitic stainless steel alkaline welding electrode with high strength, high plasticity, sand and water erosion resistance and a production method thereof for welding joints of hydraulic turbine units. Background technique [0002] Hydropower is a green energy, renewable energy, low operating costs, convenient for power peak regulation, and conducive to improving resource utilization and comprehensive economic and social benefits. Calling for the adoption of clean energy, green energy, and renewable energy, reducing harmful emissions has become the main way to reduce environmental pollution. China has built various conventional hydropower stations such as Gezhouba, Wujiangdu, Baishan, Longyangxia and Yili River cascades, as well as large-scale pumped storage power stations such as Panjiakou and the experimental Jiangxia tidal power station. In the future, the construc...

Claims

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Application Information

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IPC IPC(8): B23K35/365B23K35/22B23K35/40
CPCB23K35/22B23K35/365B23K35/40
Inventor 袁宁刘奇望蒋勇李欣雨王若蒙白昶明廷泽邬亲丹
Owner ATLANTIC CHINA WELDING CONSUMABLES
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