CN101704168B - Cavitation-corrosion-resistant surfacing welding material - Google Patents
Cavitation-corrosion-resistant surfacing welding material Download PDFInfo
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- CN101704168B CN101704168B CN2009100352832A CN200910035283A CN101704168B CN 101704168 B CN101704168 B CN 101704168B CN 2009100352832 A CN2009100352832 A CN 2009100352832A CN 200910035283 A CN200910035283 A CN 200910035283A CN 101704168 B CN101704168 B CN 101704168B
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Abstract
The invention provides a cavitation-corrosion-resistant surfacing welding material, which belongs to the field of novel welding materials. The surfacing material specifically comprises the following chemical components in percentage by mass: less than or equal to 0.10 percent of C, 12 to 25 percent of Cr, 1.0 to 2.0 percent of Co, 1.5 to 2.5 percent of Mo, 6.0 to 8.0 percent of Ni, 0.5 to 1.0 percent of Mn, 0.3 to 0.8 percent of Si, less than or equal to 0.03 percent of P, less than or equal to 0.03 percent of S, and the balance of Fe. The invention has cavitation-corrosion-resistant stainless steel, cobalt-based alloy or nickel-based alloy prepared into cavitation-corrosion-resistant surfacing welding wires and then performs surfacing on conventional materials, and the cavitation-corrosion resistance and lifespan of workpieces subjected to surfacing are greatly improved, while maintenance cost is reduced.
Description
Technical field
The invention belongs to novel field of welding material, be mainly used in the surface overlaying material of preparation cavitation-corrosion-resistant, in the service life of adopting this resurfacing welding material can effectively improve the cavitation-corrosion-resistant alloy workpiece, reduce maintenance cost.
Background technology
Cavitation damage is the corrosion behavior that occurs on the fluid devices such as the hydraulic turbine, screw, water pump.It has directly caused the generation of material surface crackle, has shortened the service life of fluid device.Therefore being necessary to find out a practicable approach solves the cavitation damage in the fluid devices such as China's hydraulic turbine, screw.Developed the cavitation-corrosion-resistant material both at home and abroad accordingly.The main in the world at present cavitation-corrosion-resistant material that adopts is novel stainless steel, cobalt-based or nickel-base alloy etc.Except traditional Cr, Ni, also generally contain the cavitation-corrosion-resistant metallic element that Co, Mo, Mn even Ti etc. generally acknowledge in the novel cavitation-corrosion-resistant stainless steel.And the phase composition of novel cavitation-corrosion-resistant material and microstructure also play a part very big to the cavitation damage performance.Compare with stainless steel with traditional carbon steel, by improving greatly the service life of the workpiece of novel cavitation-corrosion-resistant alloy preparation, but the production cost of cavitation-corrosion-resistant stainless steel, cobalt-base alloys or nickel-base alloy is quite high.
Cavitation-corrosion-resistant stainless steel, cobalt-base alloys or nickel-base alloy are prepared into the cavitation-corrosion-resistant bead welding wire, then the built-up welding valid approach of then can yet be regarded as on traditional material.This technological Practical significance is:
(1) do not need the whole cavitation-corrosion-resistant material that adopts, a large amount of economical with materials reduce cost;
(2) to China's present situation, built-up welding cavitation-corrosion-resistant material is than changing cavitation-corrosion-resistant equipment more economically with rapid;
(3) easy to maintenance, be applicable to not easily changeable large-scale fluid device, like the hydraulic turbine;
(4), improved the mobility and the fighting capacity on naval vessel as the hull resurfacing welding material.
Along with developing rapidly of surface overlaying technology, what application was wider in the industry is the built-up welding of abrasion-proof corrosion-proof corrosion material.But there are not the exploitation and the application of cavitation-corrosion-resistant surface overlaying material so far.
Summary of the invention
The purpose of this invention is to provide a kind of composition simplicity of design, surface overlaying material easy to use, workpiece is through after the surface overlaying, and cavitation-corrosion-resistant performance and service life improve greatly, and maintenance cost also decreases.
The present invention realizes through following technical scheme: a kind of surfacing welding material of cavitation-corrosion-resistant is characterized in that the concrete chemical composition quality percentage of this resurfacing welding material is: C≤0.10%; Cr12～25%; Co1.0～2.0%; Mo1.5～2.5%; Ni6.0～8.0%; Mn0.5～1.0%; Si0.3～0.8%; P≤0.03%; S≤0.03%; Surplus is Fe.
The definite foundation and the reason of resurfacing welding material chemical composition scope are following among the present invention: for guaranteeing that workpiece is after surface overlaying; Existing enough cavitation-corrosion-resistant property also have other excellent mechanical property; When reducing phosphorus content, the alloying element that adds in the resurfacing welding material mainly contains three major types: one type is to improve the corrosion proof Cr of overlay cladding, Co element; One type is the Mo, Ti that can form at overlay cladding the precipitation strength phase etc.; Also have one type to be that statenchyma guarantees not occur or control δ-ferritic element such as Ni, Mn etc. occurring in the overlay cladding.
Must the strict phosphorus content of controlling in the resurfacing welding material.Along with the increase of carbon content in the overlay cladding, the intensity of overlay cladding, hardness increase, and corrosion resistance, toughness reduce, and martensite transformation temperature also will obviously reduce.When the phosphorus content in the overlay cladding is lower than 0.02%, can not obtain good age-hardening effect.In addition, phosphorus content is higher than 0.06% will lose toughness and ductility, and temperature is high when considering built-up welding, and high-temperature residence time is long, and problems such as scaling loss can take place carbon, should phosphorus content in the resurfacing welding material be controlled at below 0.10%.
Chromium is ferrite stabilizer, is the basic element that improves the overlay cladding corrosion resistance, also is the main adding elements of cavitation-corrosion-resistant resurfacing welding material.Its solid solution can improve passivation ability in iron, and gives good anti-corrosion.Chromium content is 12% o'clock in overlay cladding, causes the corrosion resistance sudden change, helps to improve at atmosphere medium and high temperature H
2Corrosion resistance among the S and in Oxidant.In acidic aqueous solution, chrome content can generate the oxide film of one deck chromium on the overlay cladding surface at 17%～18% o'clock in the overlay cladding, improved corrosion resistance.But, the chromium too high levels, the stable ferrite content with significantly increasing under quenching, the tempered condition reduces the hardness and the tensile strength of overlay cladding, and will significantly reduce martensite transformation temperature.Therefore, in the resurfacing welding material chromium content is controlled between 12～25%.
Cobalt is the most corrosion resistant metal that it is found that.Its stacking fault energy (SFE) is very low, is approximately 0.02J/m
2, the equilibrium spacing of partial dislocation is 35 atomic distances, low SFE is a key factor that improves the cavitation-corrosion-resistant performance.Co is added in the resurfacing welding material, can improve temper resistance, and solid solution strengthening effect is arranged.But costing an arm and a leg of cobalt is controlled at 1.0～2.0% with its content in weld overlay materials.
The adding of molybdenum can increase temper resistance and strengthen the post-curing effect.The tiny solid matter cube M of molybdenum alloy formation
2The X phase increases the post-curing effect, and has high stability, helps improving the corrosion resistance and the cryogenic mechanics performance of overlay cladding.When molybdenum content was 2% left and right sides, overlay cladding had higher hardness, but too high molybdenum will promote δ-ferritic formation, deleterious impact on the contrary.Therefore, the preferable range of molybdenum content should be between 1.5%～2.5%.
Nickel is austenite former; Can reduce δ-ferrite content in the overlay cladding; Effect is best in all alloying elements, can improve corrosion resistance and cavitation-corrosion-resistant performance and the wear-corrosion resistance in the water that contains silt that flows of surface overlaying layer in reducing medium.Suitably improve nickel content in the overlay cladding, also can effectively improve the hardenability and the quenching degree of overlay cladding, promote martensite transfor mation, improve the passivation tendency of surface overlaying layer, obtain full martensitic structure after guaranteeing to quench.In order to reduce δ-ferrite content in the overlay cladding as far as possible, nickel content should be between 6.0%～8.0% in the resurfacing welding material.
Manganese is more weak austenite former, but has the effect of strong stable austenite, is effective deoxidation and desulfurizing agent simultaneously.Suitably control manganese content can reduce δ-ferrite content in the overlay cladding, and intensity increases simultaneously.Here its content is controlled between 0.5～1.0%.
Silicon is strong δ-ferrite former, also is main deoxidant element simultaneously.Therefore, should control has an amount of silicon in the overlay cladding, satisfies the deoxidation requirement and gets final product.If silicone content is too high in the overlay cladding, δ-ferrite content will increase in the steel, and martensite transformation temperature reduces, and worsen the cavitation-corrosion-resistant property of overlay cladding.Do not damage cavitation-corrosion-resistant property for the deoxidation effect that obtains, its content is 0.3～0.8%.
Sulphur, phosphorus all are the objectionable impurities in the steel.Should S, P content be controlled at below 0.03% as far as possible.
The present invention can be applicable to MIG (metal argon arc welding) or TIG (argon tungsten-arc welding) surface soldered method.
Description of drawings
Fig. 1 embodiment 1 cavitation damage sample metallograph
Fig. 2 embodiment 3 cavitation damage sample metallographs
The specific embodiment
Embodiments of the invention 1: a kind of cavitation-corrosion-resistant resurfacing welding material, its concrete chemical composition is: C0.05%; Cr13%; Co1.0%; Mo1.5%; Ni6.0%; Mn0.5%; Si0.3%; P≤0.03%; S≤0.03%; Surplus is Fe.1Cr18Ni9Ti carries out surface overlaying to the turbine blade common used material.With abrasive paper for metallograph polished in the built-up welding surface before the welding, and use acetone, adopt MIG to carry out surface soldered then, its welding parameter: weldingvoltage U=25.4V, welding current I=200A, the protection throughput is 18L/min, speed of welding is 5mm/s.After the surface overlaying, adopt JY98-IIIDN type ultrasonic cell disruptor to carry out cavitation erosion test, vibration frequency is 20kHz, and medium adopts distilled water, and the cooling water water temperature is controlled at 21 ℃.Microexamination is carried out at the cavitation damage position, and the result shows: adopt the resurfacing welding material of this composition to carry out the MIG surface soldered, and cavity negligible amounts in the overlay cladding, but the cavity size is big, and as shown in Figure 1.
Embodiments of the invention 2: a kind of cavitation-corrosion-resistant resurfacing welding material, its concrete chemical composition is: C0.05%; Cr15%; Co1.2%; Mo1.5%; Ni6.5%; Mn0.5%; Si0.5%; P≤0.03%; S≤0.04%; Surplus is Fe.Carry out surface overlaying to the 1Cr18Ni9Ti material.Before the welding polished in the built-up welding surface, and use acetone, adopt MIG to carry out surface soldered then, welding parameter and cavitation erosion test parameter are with implementing 1.Microexamination is carried out at the cavitation damage position, and the result shows: adopt the resurfacing welding material of this composition to carry out the MIG surface soldered, and cavity negligible amounts in the overlay cladding, the cavity size is little than embodiment 1.
Embodiments of the invention 3: a kind of cavitation-corrosion-resistant resurfacing welding material, its concrete chemical composition is: C0.07%; Cr17%; Co1.5%; Mo1.8%; Ni7.0%; Mn0.8%; Si0.5%; P≤0.03%; S≤0.03%; Surplus is Fe.Carry out surface overlaying to 1Cr18Ni9Ti.Before the welding polished in the built-up welding surface, and use acetone, adopt MIG to carry out surface soldered then, welding parameter and cavitation erosion test parameter are with implementing 1.Microexamination is carried out at the cavitation damage position, and the result shows: adopt the resurfacing welding material of this composition to carry out the MIG surface soldered, and cavity negligible amounts in the overlay cladding, size is also less, as shown in Figure 2 simultaneously.
Embodiments of the invention 4: a kind of cavitation-corrosion-resistant resurfacing welding material, its concrete chemical composition is: C0.07%; Cr20%; Co1.7%; Mo2.0%; Ni7.5%; Mn0.8%; Si0.8%; P≤0.03%; S≤0.03%; Surplus is Fe.Carry out surface overlaying to 1Cr18Ni9Ti.Before the welding polished in the built-up welding surface, and use acetone, adopt MIG to carry out surface soldered then, welding parameter and cavitation erosion test parameter are with implementing 1.Microexamination is carried out at the cavitation damage position, and the result shows: adopt the resurfacing welding material of this composition to carry out the MIG surface soldered, cavity quantity is than embodiment more than 3 in the overlay cladding, and the cavity size is less.
Embodiments of the invention 5: a kind of cavitation-corrosion-resistant resurfacing welding material, its concrete chemical composition is: C0.10%; Cr25%; Co2.0%; Mo2.5%; Ni8.0%; Mn1.0%; Si0.8%; P≤0.03%; S≤0.03%; Surplus is Fe.Carry out surface overlaying to 1Cr18Ni9Ti.Before the welding polished in the built-up welding surface, and use acetone, adopt MIG to carry out surface soldered then, welding parameter and cavitation erosion test parameter are with implementing 1.Microexamination is carried out at the cavitation damage position, and the result shows: adopt the resurfacing welding material of this composition to carry out the MIG surface soldered, cavity quantity is than embodiment more than 3 in the overlay cladding, and the cavity size is less.
Adopt the embodiment of the invention resurfacing welding material can built-up welding on traditional material, and obtain good cavitation-corrosion-resistant performance, the suitable various metal material surface built-up welding that need cavitation-corrosion-resistant.
Claims (3)
1. the surfacing welding material of a cavitation-corrosion-resistant is characterized in that: the chemical composition of above-mentioned resurfacing welding material by mass percentage: C≤0.10%; Cr12～25%; Co1.0～2.0%; Mo1.5～2.5%; Ni6.0～8.0%; Mn0.5～1.0%; Si0.3～0.8%; P≤0.03%; S≤0.03%; Surplus is Fe.
2. the surfacing welding material of the described a kind of cavitation-corrosion-resistant of claim 1 is characterized in that: chemical composition by mass percentage: C0.07%; Cr17%; Co1.5%; Mo1.8%; Ni7.0%; Mn0.8%; Si0.5%; P≤0.03%; S≤0.03%; Surplus is Fe.
The described material of claim 1 on traditional material built-up welding to prevent the purposes of cavitation damage.
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102009283B (en) * | 2010-06-30 | 2012-12-12 | 江苏锋泰钻石工具制造有限公司 | Cavitation corrosion resistant stainless steel solder wire and welding method thereof |
| CN102011067A (en) * | 2010-12-14 | 2011-04-13 | 江苏大学 | Cavitation corrosion resistant dual-phase stainless steel |
| CN102489540B (en) * | 2011-11-21 | 2014-11-26 | 浙江中盛铝业有限公司 | Method for manufacturing antirust aluminum alloy round tubes and flat tubes for automobile radiator and air conditioner condenser |
| US20190160602A1 (en) * | 2016-08-03 | 2019-05-30 | Aperam | Method for manufacturing a steel part, including the addition of a molten metal to a supporting part, and part thus obtained |
| CN114074234A (en) * | 2020-08-12 | 2022-02-22 | 中国科学院上海应用物理研究所 | Corrosion-resistant complex alloy material with stable high-temperature structure and preparation method thereof |
| CN114535862B (en) * | 2021-12-14 | 2023-04-28 | 钢铁研究总院 | High-strength and high-toughness low-temperature stainless steel welding wire and postweld heat treatment method thereof |
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| CN1125965A (en) * | 1993-06-21 | 1996-07-03 | 桑德维克公司 | Ferritic-austenitic stainless steel and use of the steel |
| CN1768156A (en) * | 2003-03-02 | 2006-05-03 | 山特维克知识产权股份有限公司 | Duplex stainless steel alloy for use in seawater applications |
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