CN103008923B - Low-hydrogen basic welding rod for welding 1Ni9 steel and preparation method thereof - Google Patents
Low-hydrogen basic welding rod for welding 1Ni9 steel and preparation method thereof Download PDFInfo
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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
The invention belongs to materials processing technology field, being specifically related to a kind of Low-hydrogen alkaline electrode for welding 1Ni9 steel, the invention still further relates to the preparation method of this Low-hydrogen alkaline electrode.
Background technology
1Ni9 steel is a kind of excellent ultralow temperature mild steel of American I NCO company invention, also be called as 9%Ni steel, be the modified martensite type cryogenic steel of a kind of low-carbon (LC), at-196 DEG C, there is excellent obdurability and weldability, compared with stainless steel, alloy content is few, low price; Compared with low temperature aluminium alloy, allowable stress is large, coefficient of thermal expansion is little, the excellent material of the draught fan impeller of being on active service under being considered to manufacture low temperature.The conventional welding material mated with 1Ni9 steel at present has the nickel-base welding rods such as ENiCrMo-3, ENiCrMo-6, these wlding production technologies are currently only external minority scientific research institution and grasp, and have the shortcomings such as nickel content is high, welding technological properties is poor, welding point impact value under liquid nitrogen temperature is lower, the weld seam life-span is short.
Summary of the invention
The object of this invention is to provide a kind of Low-hydrogen alkaline electrode for welding 1Ni9 steel, solving the problem of existing welding rod nickel content height and processing performance difference.
Another object of the present invention is to provide the preparation method of above-mentioned Low-hydrogen alkaline electrode.
The technical solution adopted in the present invention is, for welding the Low-hydrogen alkaline electrode of 1Ni9 steel, comprises coating and core wire, coating is by weight being made up of following material: marble 34 ~ 48%, fluorite 20 ~ 27%, quartz 2 ~ 8%, zircon sand 4 ~ 5%, rutile 3 ~ 10%, titanium dioxide 1 ~ 3%, ferrosilicon 2 ~ 5%, rare earth ferrosilicon 1 ~ 3%, ferrotianium 4 ~ 11%, mid-carbon fe-mn 2 ~ 8%, synthetic mica 1 ~ 3%, soda ash 1 ~ 2%, each weight percentages of components sum is 100%.
Another technical scheme of the present invention is, the preparation method of above-mentioned Low-hydrogen alkaline electrode, and concrete steps are as follows:
Step 1, takes marble 34 ~ 48% by weight percentage, fluorite 20 ~ 27%, quartz 2 ~ 8%, zircon sand 4 ~ 5%, rutile 3 ~ 10%, titanium dioxide 1 ~ 3%, ferrosilicon 2 ~ 5%, rare earth ferrosilicon 1 ~ 3%, ferrotianium 4 ~ 11%, mid-carbon fe-mn 2 ~ 8%, synthetic mica 1 ~ 3%, soda ash 1 ~ 2%, each weight percentages of components sum is 100%; Above-mentioned medicinal powder material is put into together with binding agent batch mixer mixing 10 ~ 20min, then mixed medicinal powder is pressed into cylindrical powder ball in balling press;
Step 2, choose UPT7013Mo or OK92.55 core wire, and place it on the wire feed platform of extrusion press, extrusion press put into by the cylindrical powder ball that step 1 is obtained, run extrusion press and obtain welding rod, put into chamber typed drying-machine by after obtained welding rod bistrique mill tail, drying according to 60 DEG C × 8h+120 DEG C × 1h+180 DEG C × 1h+250 DEG C × 1h+350 DEG C × 1.5h, namely obtaining the Low-hydrogen alkaline electrode for welding 1Ni9 steel.
Feature of the present invention is also,
Wherein binding agent is the sodium silicate of modulus m=3, and the weight ratio of coating and sodium silicate is 2.8 ~ 3.8:1.
The invention has the beneficial effects as follows, the present invention is for welding the Low-hydrogen alkaline electrode of 1Ni9 steel compared with existing ENiCrMo-3, ENiCrMo-6 nickel-base welding rod, and arc-stabilising is good, de-slag is easy, splash and flue dust few, slag covers even, molten bath good fluidity, appearance of weld is attractive in appearance; This Low-hydrogen alkaline electrode deposited metal diffusible hydrogen content is lower in addition, meets low hydrogen content requirement, and weld seam toughness under liquid nitrogen temperature is better, engineering demands, and preparation method is simple.
Accompanying drawing explanation
Fig. 1 is the deposited metal metallograph of the embodiment of the present invention 1;
Fig. 2 is the deposited metal metallograph of the embodiment of the present invention 6.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
The present invention, for welding the Low-hydrogen alkaline electrode of 1Ni9 steel, comprises coating and core wire, and coating is by weight being made up of following material: marble 34 ~ 48%, fluorite 20 ~ 27%, quartz 2 ~ 8%, zircon sand 4 ~ 5%, rutile 3 ~ 10%, titanium dioxide 1 ~ 3%, ferrosilicon 2 ~ 5%, rare earth ferrosilicon 1 ~ 3%, ferrotianium 4 ~ 11%, mid-carbon fe-mn 2 ~ 8%, synthetic mica 1 ~ 3%, soda ash 1 ~ 2%, each weight percentages of components sum is 100%; Core wire adopts UPT7013Mo or OK92.55 core wire.
The preparation method of above-mentioned Low-hydrogen alkaline electrode, concrete steps are as follows:
Step 1, takes marble 34 ~ 48% by weight percentage, fluorite 20 ~ 27%, quartz 2 ~ 8%, zircon sand 4 ~ 5%, rutile 3 ~ 10%, titanium dioxide 1 ~ 3%, ferrosilicon 2 ~ 5%, rare earth ferrosilicon 1 ~ 3%, ferrotianium 4 ~ 11%, mid-carbon fe-mn 2 ~ 8%, synthetic mica 1 ~ 3%, soda ash 1 ~ 2%, each weight percentages of components sum is 100%; Above-mentioned medicinal powder material is put into together with binding agent batch mixer mixing 10 ~ 20min, then mixed medicinal powder is pressed into cylindrical powder ball in balling press; Wherein binding agent is the sodium silicate of modulus m=3, and the weight ratio of coating and sodium silicate is 2.8 ~ 3.8:1;
Step 2, choose UPT7013Mo or OK92.55 core wire, and place it on the wire feed platform of extrusion press, extrusion press put into by the cylindrical powder ball that step 1 is obtained, run extrusion press and obtain welding rod, put into chamber typed drying-machine by after obtained welding rod bistrique mill tail, drying according to 60 DEG C × 8h+120 DEG C × 1h+180 DEG C × 1h+250 DEG C × 1h+350 DEG C × 1.5h, namely obtaining the Low-hydrogen alkaline electrode for welding 1Ni9 steel.
The effect of each component of coating:
Marble and fluorite: marmorean main component is CaCO
3, its effect is slag making.CaCO
3start to decompose at 600 DEG C, react CaCO
3→ CaO+CO
2, generate CaO and discharge CO
2gas, CaO belongs to ionic bond, and play and increase molten capillary effect, CaO does not produce strong oxidation in the molten drop stage to metal in addition, thus can not make metal drop oxygenation and reduce surface tension, and obvious marble can make molten drop surface thicker.Along with the further increase of marble addition, the CO that it is formed after decomposing
2air-flow strengthens the effect that blows that molten drop produces, and impels the droplet transfer.In addition, CO
2air-flow, to the oxidation of molten drop, is conducive to the surface tension reducing metal drop.The main chemical composition of fluorite is CaF
2, its Main Function is shoddye, slag making and fall hydrogen.Fluorite can reduce slag surface tension force significantly, but the membership that adds of fluorite increases substantially cathode fall, significantly enhance the burn-off rate of welding rod, molten drop transition frequency increases, decrease the time of staying of molten drop at electrode tip, droplet temperature reduces and surface tension is increased, and makes molten drop thicker; On the other hand, the addition of fluorite increases, and will change arc shape significantly, electric arc is made to become concentrated, which reduce electric arc reduces molten drop temperature to the heating surface (area) (HS of molten drop, cause the surface tension of molten drop to increase, also exacerbate the effect of arc force to molten drop simultaneously.The CaF when high temperature
2pyroreaction can occur and generate HF gas, HF is volatile, has very large effect to desulfurization and minimizing white point tendency.But fluorite belongs to high ionization element, make arc burning unstable and produce this toxic gas of HF, therefore fluorite percentage by weight control between 18% ~ 25% comparatively reasonable.
When marble and fluorite total amount certain, marble is very important with the ratio of fluorite, and the ratio of marble and fluorite is between 1 ~ 3, and arc stability, blowing force is large, splashes few.When marble and fluorite ratio >=3, there is dry slag in weld seam, and take off slag during V-butt welding bad, face of weld has pore.When marble and fluorite ratio≤1, arc stability is poor.Therefore, improve marble and reduce fluorite content (ratio is between 1 ~ 3), arc stability increases, and the basicity of slag and oxidisability increase, but along with the increase of its ratio, the fusing point of slag improves, and viscosity and surface tension increase, slag fluidity is deteriorated, and welding bead narrows, and heap is high to be increased; Otherwise arc stability can be made to be deteriorated, and coating fusing point reduces, and welding rod sleeve shortens, and blow force of arc is inadequate, and splash and increase, slag is excessively rare, protects bad, and is difficult to operation.
Quartz and zircon sand: the main chemical compositions of quartz is SiO
2, SiO
2main Function be shoddye, adjust viscosity coefficient of dross, improve extrusion performance.Add quartz in coating mainly in order to form composition silicate, adjustment slag acid-base value, improves slag physical characteristic, improves the slag removability of slag.In the present invention, quartzy percentage by weight controls 2 ~ 8% time, and it is better that welding rod takes off slag.The main component of zircon sand is silicate (ZrSiO
4), its fusing point is high, thermal conductivity is low, linear expansion coefficient is little, and in coating, mainly play de-slag effect, percentage by weight effect 4 ~ 5% time is comparatively remarkable.
Rutile and titanium dioxide: rutile and titanium dioxide main chemical compositions are TiO
2.TiO
2there is the effect such as stabilising arc, reduction viscosity coefficient of dross (mainly cause short slag when high temperature, increase electric conductivity, improve de-slag).Rutile is good slag former, plastic-viscous admixture, slag can be made to become short slag, be conducive to the welding technological properties improving welding rod, and this is more general in the low-hydrogen electrode of DC-AC two-use.Titanium dioxide can make coating have good plasticity, improves welding rod extrusion performance, but consumption is too much unsuitable, otherwise welding rod is easily rubescent, and content must be suitable.
Ferroalloy: the ferroalloy that the present invention uses mainly contains ferrosilicon, rare earth ferrosilicon, ferrotianium, mid-carbon fe-mn.
The chemical composition of ferrosilicon consists of 75%Si, 2%Al, all the other are Fe.In ferrosilicon, Si and Fe is ionized under high arc temperature, discharges the electronics of some, is conducive to improving arc stability, and ferrosilicon extrusion performance is good, and in welding rod drying process, coating generally can not bubble.
Rare earth ferrosilicon can significantly improve the low-temperature impact toughness of weld metal; React with sulphur, oxygen in Welding Metallurgy process, can produce rare-earth sulfide, rare earth oxide and rare-earth oxide sulfate, major part floats in slag, has effectively purified weld seam; Can refinement seam organization, increase the content of acicular ferrite, improve the shape of field trash, size and distribution, reduce the effect of the oxygen content in weld seam.
Ferrotianium chemical composition consists of: 30%Ti, 4%Si, all the other are Fe.Ferrotianium is main deoxidier, and the product after deoxidation is TiO
2, there is again the effect of rutile and titanium dioxide.
Ferromanganese is mid-carbon fe-mn, and chemical composition consists of 82%Mn, 1.5%Si, all the other are Fe.Ferromanganese has deoxidation, and the heat discharged in deoxidation process can supplement heat molten bath being reduced because marble divides heat of desorption, and Mn infiltrates in weld seam as alloying constituent can improve weld joint mechanical performance.
Synthetic mica and soda ash: the main chemical compositions of synthetic mica is 45 ~ 50%SiO
2, 20 ~ 35%Al
2o
3, remaining is mainly the oxide of K, Na etc.Synthetic mica has stabilising arc, slag making, increase coating gas permeability, prevents the effects such as electrode coating is dry and cracked and rubescent, and its springiness, be conducive to welding rod and produce.
Soda ash has the extrusion performance improving welding rod, makes welding rod smooth surface, is shaped attractive in appearance, the effect of stabilising arc.
Embodiment 1
Step 1, takes 350g marble respectively, 230g fluorite, 55g quartz, 40g rutile, 12 grams of titanium dioxides, 40g zircon sand, 45g ferrosilicon, 26g rare earth ferrosilicon, 104g ferrotianium, 78g mid-carbon fe-mn, 10g synthetic mica, 10g soda ash, above-mentioned medicinal powder material is put into batch mixer mixing 15min together with 350g sodium silicate, then mixed medicinal powder is put into balling press and be pressed into cylindrical powder ball;
Step 2, select UPT7013Mo core wire, and place it on the wire feed platform of extrusion press, extrusion press put into by the cylindrical powder ball that step 1 is obtained, run extrusion press and obtain welding rod, put into chamber typed drying-machine by after the welding rod bistrique made mill tail, drying according to 60 DEG C × 8h+120 DEG C × 1h+180 DEG C × 1h+250 DEG C × 1h+350 DEG C × 1.5h, namely obtaining the Low-hydrogen alkaline electrode for welding 1Ni9 steel.
The Low-hydrogen alkaline electrode welding 1Ni9 steel plate utilizing embodiment 1 obtained, welding condition is: before the weldering of (1) mother metal, Technology for Heating Processing is 800 DEG C of shrends+670 DEG C of tempering+570 DEG C of air coolings, without the need to preheating before weldering.(2) welding current is: bottoming 70 ~ 75A, fills 100 ~ 110A, capping 95 ~ 100A; Weldingvoltage is: bottoming 19 ~ 23V, fills 24 ~ 29V, capping 22 ~ 26V; Speed of welding is less than 13cm/mm.(3) weld interpass temperature is less than 100 DEG C, and postwelding does not need heat treatment.
The processing performance of the Low-hydrogen alkaline electrode that embodiment 1 is obtained and welding joint mechanical property are in table 1.
The processing performance of the Low-hydrogen alkaline electrode that table 1 embodiment 1 is obtained and welding joint mechanical property
The weld metal zone deposited metal metallograph of the Low-hydrogen alkaline electrode that embodiment 1 is obtained as shown in Figure 1, deposited metal microstructure is γ phase austenite and precipitated phase composition, crystal habit is columnar dendrite, has certain directionality, and in crystallization process, have dendritic segregation and cyrystal boundary segregation to occur.
Embodiment 2
Step 1, takes 380g marble respectively, 200g fluorite, 50g quartz, 55g rutile, 19g titanium dioxide, 50g zircon sand, 41g ferrosilicon, 21g rare earth ferrosilicon, 84g ferrotianium, 60g mid-carbon fe-mn, 20g synthetic mica, 20g soda ash, above-mentioned medicinal powder material is put into batch mixer mixing 10min together with 350g sodium silicate, then mixed medicinal powder is put into balling press and be pressed into cylindrical powder ball;
Step 2, select OK92.55 core wire, and place it on the wire feed platform of extrusion press, extrusion press put into by the cylindrical powder ball that step 1 is obtained, run extrusion press and obtain welding rod, put into chamber typed drying-machine by after the welding rod bistrique made mill tail, drying according to 60 DEG C × 8h+120 DEG C × 1h+180 DEG C × 1h+250 DEG C × 1h+350 DEG C × 1.5h, namely obtaining the Low-hydrogen alkaline electrode for welding 1Ni9 steel.
The Low-hydrogen alkaline electrode welding 1Ni9 steel plate utilizing embodiment 2 obtained, welding condition is identical with embodiment 1 welding condition.
The processing performance of the Low-hydrogen alkaline electrode that embodiment 2 is obtained and welding joint mechanical property are in table 2.
The processing performance of the Low-hydrogen alkaline electrode that table 2 embodiment 2 is obtained and welding joint mechanical property
Embodiment 3
Step 1, takes 410g marble respectively, 220g fluorite, 70g quartz, 34g rutile, 13g titanium dioxide, 40g zircon sand, 25g ferrosilicon, 19g rare earth ferrosilicon, 72g ferrotianium, 57g mid-carbon fe-mn, 30g synthetic mica, 10g soda ash, above-mentioned medicinal powder material is put into batch mixer mixing 10min together with 335g sodium silicate, then mixed medicinal powder is put into balling press and be pressed into cylindrical powder ball;
Step 2, select UPT7013Mo core wire, and place it on the wire feed platform of extrusion press, extrusion press put into by the cylindrical powder ball that step 1 is obtained, run extrusion press and obtain welding rod, put into chamber typed drying-machine by after the welding rod bistrique made mill tail, drying according to 60 DEG C × 8h+120 DEG C × 1h+180 DEG C × 1h+250 DEG C × 1h+350 DEG C × 1.5h, namely obtaining the Low-hydrogen alkaline electrode for welding 1Ni9 steel.
The Low-hydrogen alkaline electrode welding 1Ni9 steel plate utilizing embodiment 3 obtained, welding condition is identical with embodiment 1 welding condition.
The processing performance of the Low-hydrogen alkaline electrode that embodiment 3 is obtained and welding joint mechanical property are in table 3.
The processing performance of the Low-hydrogen alkaline electrode that table 3 embodiment 3 is obtained and welding joint mechanical property
Embodiment 4
Step 1, takes 420g marble respectively, 260g fluorite, 25g quartz, 63g rutile, 23g titanium dioxide, 40g zircon sand, 30g ferrosilicon, 15g rare earth ferrosilicon, 60g ferrotianium, 44g mid-carbon fe-mn, 10g synthetic mica, 10g soda ash, above-mentioned medicinal powder material is put into batch mixer mixing 15min together with 300g sodium silicate, then mixed medicinal powder is put into balling press and be pressed into cylindrical powder ball;
Step 2, select OK92.55 core wire, and place it on the wire feed platform of extrusion press, extrusion press put into by the cylindrical powder ball that step 1 is obtained, run extrusion press and obtain welding rod, put into chamber typed drying-machine by after obtained welding rod bistrique mill tail, drying according to 60 DEG C × 8h+120 DEG C × 1h+180 DEG C × 1h+250 DEG C × 1h+350 DEG C × 1.5h, namely obtaining the Low-hydrogen alkaline electrode for welding 1Ni9 steel.
The Low-hydrogen alkaline electrode welding 1Ni9 steel plate utilizing embodiment 4 obtained, welding condition is identical with embodiment 1 welding condition.
The processing performance of the Low-hydrogen alkaline electrode that embodiment 4 is obtained and welding joint mechanical property are in table 4.
The processing performance of the Low-hydrogen alkaline electrode that table 4 embodiment 4 is obtained and welding joint mechanical property
Embodiment 5
Step 1, takes 440g marble respectively, 210g fluorite, 20g quartz, 95g rutile, 28g titanium dioxide, 40g zircon sand, 35g ferrosilicon, 13g rare earth ferrosilicon, 52g ferrotianium, 37g mid-carbon fe-mn, 20g synthetic mica, 10g soda ash, above-mentioned medicinal powder material is put into batch mixer mixing 20min together with 260g sodium silicate, then mixed medicinal powder is put into balling press and be pressed into cylindrical powder ball;
Step 2, select UPT7013Mo core wire, and place it on the wire feed platform of extrusion press, extrusion press put into by the cylindrical powder ball that step 1 is obtained, run extrusion press and obtain welding rod, put into chamber typed drying-machine by after obtained welding rod bistrique mill tail, drying according to 60 DEG C × 8h+120 DEG C × 1h+180 DEG C × 1h+250 DEG C × 1h+350 DEG C × 1.5h, namely obtaining the Low-hydrogen alkaline electrode for welding 1Ni9 steel.
The Low-hydrogen alkaline electrode welding 1Ni9 steel plate utilizing embodiment 5 obtained, welding condition is identical with embodiment 1 welding condition.
The processing performance of the Low-hydrogen alkaline electrode that embodiment 5 is obtained and welding joint mechanical property are in table 5.
The processing performance of the Low-hydrogen alkaline electrode that table 5 embodiment 5 is obtained and welding joint mechanical property
Embodiment 6
Step 1, takes 470g marble respectively, 240g fluorite, 60g quartz, 41g rutile, 14g titanium dioxide, 50g zircon sand, 20g ferrosilicon, 10g rare earth ferrosilicon, 40g ferrotianium, 20g mid-carbon fe-mn, 20g synthetic mica, 15g soda ash, above-mentioned medicinal powder material is put into batch mixer mixing 15min together with 350g sodium silicate, then mixed medicinal powder is put into balling press and be pressed into cylindrical powder ball;
Step 2, select OK92.55 core wire, and place it on the wire feed platform of extrusion press, extrusion press put into by the cylindrical powder ball that step 1 is obtained, run extrusion press and obtain welding rod, put into chamber typed drying-machine by after obtained welding rod bistrique mill tail, drying according to 60 DEG C × 8h+120 DEG C × 1h+180 DEG C × 1h+250 DEG C × 1h+350 DEG C × 1.5h, namely obtaining the Low-hydrogen alkaline electrode for welding 1Ni9 steel.
The Low-hydrogen alkaline electrode welding 1Ni9 steel plate utilizing embodiment 6 obtained, welding condition is identical with embodiment 1 welding condition.
The processing performance of the Low-hydrogen alkaline electrode that embodiment 6 is obtained and welding joint mechanical property are in table 6.
The processing performance of the Low-hydrogen alkaline electrode that table 6 embodiment 6 is obtained and welding joint mechanical property
The weld metal zone deposited metal phasor of the Low-hydrogen alkaline electrode that embodiment 6 is obtained as shown in Figure 2, deposited metal microstructure is tiny austenite and precipitated phase, crystal habit is columnar dendrite, has certain directionality, and in crystallization process, have dendritic segregation and cyrystal boundary segregation to occur.
Embodiment 7
Step 1, takes 480g marble respectively, 250g fluorite, 30g quartz, 45g rutile, 15g titanium dioxide, 40g zircon sand, 21g ferrosilicon, 14g rare earth ferrosilicon, 45g ferrotianium, 30g mid-carbon fe-mn, 10g synthetic mica, 20g soda ash, above-mentioned medicinal powder material is put into batch mixer mixing 15min together with 280g sodium silicate, then mixed medicinal powder is put into balling press and be pressed into cylindrical powder ball;
Step 2, select UPT7013Mo core wire, and place it on the wire feed platform of extrusion press, extrusion press put into by the cylindrical powder ball that step 1 is obtained, run extrusion press and obtain welding rod, put into chamber typed drying-machine by after obtained welding rod bistrique mill tail, drying according to 60 DEG C × 8h+120 DEG C × 1h+180 DEG C × 1h+250 DEG C × 1h+350 DEG C × 1.5h, namely obtaining the Low-hydrogen alkaline electrode for welding 1Ni9 steel.
The Low-hydrogen alkaline electrode welding 1Ni9 steel plate utilizing embodiment 7 obtained, welding condition is identical with embodiment 1 welding condition.
The processing performance of the Low-hydrogen alkaline electrode that embodiment 7 is obtained and welding joint mechanical property are in table 7.
The processing performance of the Low-hydrogen alkaline electrode that table 7 embodiment 7 is obtained and welding joint mechanical property
The present invention compares with existing ENiCrMo-3 with ENiCrMo-6 welding rod for the Low-hydrogen alkaline electrode of welding 1Ni9 steel, and arc-stabilising is good, and de-slag is easy, splash and flue dust few, slag covers even, molten bath good fluidity, and appearance of weld is attractive in appearance; This Low-hydrogen alkaline electrode deposited metal diffusible hydrogen content is lower in addition, the requirement of compound low hydrogen content, and weld seam toughness under liquid nitrogen temperature is better, engineering demands, and preparation method is simple.
Claims (1)
1. for welding the Low-hydrogen alkaline electrode of 1Ni9 steel, it is characterized in that, comprising coating and core wire, described coating is made up of following material: 350g marble, 230g fluorite, 55g quartz, 40g rutile, 12g titanium dioxide, 40g zircon sand, 45g ferrosilicon, 26g rare earth ferrosilicon, 104g ferrotianium, 78g mid-carbon fe-mn, 10g synthetic mica, 10g soda ash;
Its concrete preparation method is:
Step 1, takes 350g marble respectively, 230g fluorite, 55g quartz, 40g rutile, 12g titanium dioxide, 40g zircon sand, 45g ferrosilicon, 26g rare earth ferrosilicon, 104g ferrotianium, 78g mid-carbon fe-mn, 10g synthetic mica, 10g soda ash, above-mentioned medicinal powder material is put into batch mixer mixing 15min together with 350g sodium silicate, then mixed medicinal powder is put into balling press and be pressed into cylindrical powder ball;
Step 2, core wire is placed on the wire feed platform of extrusion press, extrusion press put into by the cylindrical powder ball that step 1 is obtained, run extrusion press and obtain welding rod, chamber typed drying-machine is put into by after the welding rod bistrique made mill tail, drying by 60 DEG C × 8h+120 DEG C × 1h+180 DEG C × 1h+250 DEG C × 1h+350 DEG C × 1.5h, namely obtaining the Low-hydrogen alkaline electrode for welding 1Ni9 steel.
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| CN1060987A (en) * | 1990-12-27 | 1992-05-13 | 李垠平 | A kind of novel electrode for cast iron |
| CN1089200A (en) * | 1992-12-29 | 1994-07-13 | 陈保国 | Rare-earth type crack-resisting welding electrode without preheating for build-up welding |
| CN1923431A (en) * | 2005-08-29 | 2007-03-07 | 宝山钢铁股份有限公司 | High ductility climate resistant solder stick with tensile strength of 600MPa |
| CN101890594A (en) * | 2010-07-30 | 2010-11-24 | 西安理工大学 | Low-hydrogen basic electrode for 25Cr2Ni4MoV alloy steel welding |
| CN101898286A (en) * | 2010-07-30 | 2010-12-01 | 西安理工大学 | Low-hydrogen alkaline welding rod for 25Cr2Ni4MoV alloy steel manual arc welding |
| CN101913034A (en) * | 2010-07-30 | 2010-12-15 | 西安理工大学 | Low-hydrogen basic electrode for manual metal arc welding of FV520 (B) stainless steel |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5847952B2 (en) * | 1978-02-03 | 1983-10-25 | 新日本製鐵株式会社 | Low hydrogen coated arc welding rod for low alloy heat resistant steel |
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2012
- 2012-12-21 CN CN201210563418.4A patent/CN103008923B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85109044A (en) * | 1985-12-13 | 1987-08-19 | 山东工业大学 | The Fe-Cr-C of alkali metal containing is a hardfacing electrode |
| CN1060987A (en) * | 1990-12-27 | 1992-05-13 | 李垠平 | A kind of novel electrode for cast iron |
| CN1089200A (en) * | 1992-12-29 | 1994-07-13 | 陈保国 | Rare-earth type crack-resisting welding electrode without preheating for build-up welding |
| CN1923431A (en) * | 2005-08-29 | 2007-03-07 | 宝山钢铁股份有限公司 | High ductility climate resistant solder stick with tensile strength of 600MPa |
| CN101890594A (en) * | 2010-07-30 | 2010-11-24 | 西安理工大学 | Low-hydrogen basic electrode for 25Cr2Ni4MoV alloy steel welding |
| CN101898286A (en) * | 2010-07-30 | 2010-12-01 | 西安理工大学 | Low-hydrogen alkaline welding rod for 25Cr2Ni4MoV alloy steel manual arc welding |
| CN101913034A (en) * | 2010-07-30 | 2010-12-15 | 西安理工大学 | Low-hydrogen basic electrode for manual metal arc welding of FV520 (B) stainless steel |
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| CN103008923A (en) | 2013-04-03 |
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