franklin marshall soldes ibs lneu uqwk

-40 ℃ to -80 ℃ low temperature toughness of steel submerged arc weld


Elements is stable. Figure 3 shows the flux in YD5o4A adding different amounts of rare earth elements on the toughness of submerged arc weld metal flux in the rare earth elements in 0.5 to 1. O%, the toughness of the room temperature has little effect, but the effect of Qi to improve the low temperature toughness of the weld was added lizard as O. 5% and 1, a 80 ℃ low temperature impact energy A is greater than 9oJ, not only increase when rare earth elements 72J. When the rare earth elements are added amounted to 1.5, then the negative to improve the toughness of the weld. Low-hydrogen alkaline flux cored welding 1.5Ni YD508A combination 1.5Ni cryogenic steel weld metal impact fracture scanning electron micrograph, showing inclusions of small spherical dispersed around 1m . Fun ln) _ ~ 3-ene earth elements on the toughness of weld metal buried arc welding of elements to defend the content of cultivated soil in the en: ● an A-0. S; 0 al; present a ls The study confirmed that, as ℃ with low-alloy steel and 0.5 ~ l. 5Ni low temperature steel, submerged into the seeds into the boat when the amount of suitable rare earth, can change the weld metal inclusions in the form, size and distribution of trace amounts of rare earth elements in the weld metal has played a clean and metamorphism,franklin marshall soldes, so that the low temperature toughness of the weld metal has been significantly improved rhyme. 4. Flux and flux-cored welding plate is a component of inclusions with the burning of low -temperature toughness and its related effects on multiple complex slag alkaline flux, in order to improve the toughness of weld metal, the welder to ensure welding jf4 a l2 an arts performance under the premise, to maximize the value of its alkalinity,christian louboutin france, which requires the flux instead of adding more music A1oa SIO, in order to reduce the oxidation potential and ensure its excellent welding performance. Adding more alkaline earth metals to increase its alkalinity, the control of the weld metal oxygen content, in order to maintain low temperature toughness of weld metal career. This requires a suitable dosage, dosage is too small, receive the results; adding excessive, things would be counterproductive. For example, when the amount of flux in the A103 by adding 32%, the weld metal containing A1 reached 0.04 or more remote scanning electron microscopy and energy through harmonic analysis, the weld is a more mixed, and found more high Al composition containing a compound mixture, and the large size, mostly for 2 ~ 3m. Then weld metal-6O ℃ impact xJjA only 30J, when the flux in the A1o. Down to 17,abercrombie france, the Al-containing weld metal volume o. 02%, weld gold session significantly reduced the number of inclusions, day 0 ℃ A value of impact energy to 5oJ more. When using flux cored wire, often in the cored marble in the form of adding a certain amount of alkali metal oxide of calcium with disabilities, the main purpose is to further improve the slag basicity, and can receive a drop of ammonia lowering effect of hydrogen. When added to eight the amount of 8%, by electron microscopy, found in the weld size is 10m high calcium composite oxide inclusions, such a large size of the inclusions, the weld toughness abrupt decline, the impact of a 40 ℃ power A, value Only when the marble 4J reduced to 5, the large size of the calcium oxide inclusions disappeared, the weld metal-4O ℃ A value of impact energy up to 30J further reduced to 2% of the marble, and through the slag and alloy cored Adjust ingredients to make a 40 ℃ weld metal A value of impact energy to 70J or more. 5. Submerged arc weld metal of the plate relative to the organization and the low-temperature impact toughness A, the value of using YD504A flux wire weld metal composition YD organization, using a combination H10Mn2 YD507A flux wire weld metal structure, welding plume using YD5O8A combination 1. 5Ni drug cored wire weld metal structure. Three sets of photographs is a common feature of the organization are small acicular ferrite-based,sac hermes birkin, accounts for about 8o % of the remaining total for the first truss iron chain body, and less pearlite} second fine iron chain body, and the organization of the light body of Cong confirmed that the organizational structure to improve - 40 ℃ to ~ 8O ℃ low temperature steel submerged arc weld metal of low-temperature toughness, the effect is very good. 3 Yuan for our existing literature and patents on access to the international steel submerged arc weld metal of low temperature toughness value of A and our country Factory production YD504A, YD507A and YD5O8A combination of different wire submerged arc weld metal at low temperature toughness At value. Seen from Table 3, low hydrogen flux YD50IA combination of high toughness iron Y-DM new H and YD continued to hold the wire in the world advanced level low-temperature toughness , low-hydrogen welding alkaline agent YD507 combination H1OMn2 wire, low-hydrogen mix alkaline flux YDs08A 1. sNi seam metal cored welding Ji on low temperature toughness and international level is very similar products, when the Ni content weld stack is similar, slightly better than similar products on the occasion of Rhu
More articles related to topics：


Campus-based repository of multimedia courseware development research

Welcome to exchange welcome cooperation - Research Series introduction of four field grade

Multivariable fuzzy control system design and simulation