news - Jiangyin Vankey Machinery Technology Co.,Ltd

2022-09-17 How to keep the MIG welding wire flux cored welding wire in warehouse How to keep the MIG welding wire storage and very long time 1. The warehouse where the welding wire is stored should have a dry and ventilated environment to avoid moisture; liquids such as water, acid, alkali and other liquids are highly volatile. There are corrosive substances, and it is not suitable to coexist with these substances in the same warehouse. 2. The welding wire should be placed on the wooden pallet, not directly on the floor or close to the wall. 3. Be careful not to break the packaging when accessing and transporting the welding wire, especially the inner packaging "heat shrinkable film". 4. After opening the welding wire package, it should be used up as soon as possible (required within one week). Once the welding wire is directly exposed to the air, its anti-rust time will be greatly shortened (especially in humid and corrosive environments) 5. Distribute welding wire in accordance with the principle of "first in, first out" to minimize product inventory time. 6. Please store according to the type and specification of welding wire to prevent misuse.

2022-09-17 For welding wire,there are in uaually four types of metals that to be welded Many friends think that as long as a worker is a welder, he can weld anything. But this is not the case. There are specialized welders in each field, and their work is mainly divided into welding four types of steel. Which are there? I represents a class of steel: belongs to carbon steel The carbon content is less than 1.35% (0.1%~1.2%), and it does not contain other alloying elements except iron, carbon and impurities such as silicon, manganese, phosphorus and sulfur within the limit. The properties of carbon steel mainly depend on the carbon content. When the carbon content increases, the strength and hardness of the steel increase, and the plasticity, toughness and weldability decrease. Compared with other steels, carbon steel is the earliest used, with low cost, wide performance range and the largest amount. It is suitable for media such as water, steam, air, hydrogen, ammonia, nitrogen and petroleum products with nominal pressure PN≤32.0MPa and temperature of -30℃~425℃. Commonly used grades are WC1, WCB, ZG25 and high-quality steel 20, 25, 30 and low-alloy structural steel 16Mn. Ⅱ represents the second-class steel: it belongs to low-alloy steel Alloy steel with less than 5% of total alloying elements is called low alloy steel. Low alloy steel is relative to carbon steel. On the basis of carbon steel, in order to improve one or more properties of steel, one or more alloying elements are intentionally added to steel, and the amount of alloy added exceeds When carbon steel has a general content in the normal production method, this steel is called alloy steel. When the total alloy content is less than 5%, it is called low alloy steel; when the alloy content is between 5% and 10%, it is called medium alloy steel; if it is greater than 10%, it is called high alloy steel. Ⅲ represents

2022-09-16 How to settle the welding wire cracks problem In the process of aluminum alloy welding, due to the different types, properties and welding structures of materials, various cracks can appear in the welded joints, and the shape and distribution characteristics of the cracks are very complex. According to their generated parts, they can be divided into the following two types of cracks form: (1) Cracks in weld metal: longitudinal cracks, transverse cracks, crater cracks, hair or arc cracks, root cracks and microcracks (especially in multi-layer welding). (2) Cracks in the heat-affected zone: weld toe cracks, laminar cracks and microscopic thermal cracks near the fusion line. According to the temperature range of crack generation, it is divided into hot crack and cold crack. Hot crack is generated at high temperature during welding, which is mainly caused by the segregation of alloy elements on the grain boundary or the existence of low melting point substances. Depending on the material of the metal to be welded, the shape, temperature range and main reasons for the occurrence of hot cracks are also different. Hot cracks can be divided into three categories: crystallization cracks, liquefaction cracks and polygonal cracks. Crystallization cracks are mainly produced in hot cracks. During the crystallization process of the weld, near the solidus line, due to the shrinkage of the solidified metal, the residual liquid metal cannot be filled in time. Intergranular cracking occurs under the action of solidification shrinkage stress or external force, which mainly occurs in carbon steel, low alloy steel welds and some aluminum alloys with more impurities. Liquefaction cracks are generated under the action of shrinkage stress during solidification of grain boundaries heated to high temperatures in the heat-affected zone. During the test, it was found that when the surface of the filler material was not sufficiently cleaned, there were still many inclusions an

2022-09-14 The Iran friends visited us,he is very interested in our MIG welding wire,flux cored welding wire Last week,our Iran friends Mr Farbod visited us. He has done the business of MIG welding wire,flux cored welding wire for more than 15 years jn Iran. He said,he will buy a lot of Welding wire,flux cored welding wire,stainless steel welding wire from our factory. We have discussed for more details of business and technical,and gave the gifts for each other.

2022-09-15 The Chinese customers visited our MIG welding wire factory today Today,one of the biggest customers visited our factory,they will buy big quantity of Welding wire from us. They will also be our overseas agency in Southern Asia.We are warmly welcome the friends to discuss technical,to visit our factory.

2022-10-19 How to keep the welding wire Welding wire is a kind of metal product. Although most of the surfaces of cored wire and seamless flux cored wire are copper plated, the surfaces of some seam cored wires are rust proof (such as chemical blackening).. In addition to plastic bags, all the bags are packed with a moisture-proof agent, which is wrapped in paper boxes. However, moisture-proof is still a problem that must be considered in the management of welding wire protection. Because it is a hygroscopic welding wire, the content of diffusible hydrogen in the deposited metal can be increased, resulting in pits, pores and other defects. The welding process performance and mechanical properties of the weld metal become worse, which can lead to weld cracking strictly, which is the same as other welding materials. Of course, since the powder in the drug cored welding wire is tightly wrapped in the steel strip, the drug powder is in contact with the air very much, and at the same time, the water glass in the electrode is not used as a moisture absorbing substance. Therefore, compared with the welding rod, the amount of moisture absorption of the welding wire is very small. However, if the welding wire is placed in a high temperature and high humidity environment for a long time, it will also absorb moisture except for rust on the surface of the welding wire.. With the increase of moisture absorption time and amount, the amount of diffusible hydrogen in the deposited metal gradually increases, which answers that the tear resistance of the weld is unfavorable. Management requirements for welding wire ① It is required that under the recommended storage conditions, the original unpacked welding wire can be kept "fresh in the factory" for at least 12 months. Of course, the maximum storage time depends on the ambient atmospheric environment (temperature, humidity, etc.).. Recommended storage conditions of

2022-09-28 Wire China will hold fair in Nanjing,the welding wire factory will get togther for it Wire China in November 2022 and to meet the international pavilion | nanjing international expo center Due to the consolidation of the epidemic prevention and control in Shanghai, the 10th China International Cable and Wire Exhibition, which was scheduled to be held at Shanghai New International Expo Center from September 26 to 29, 2022, has been determined by comprehensive analysis and full consultation. Will be held at Nanjing International Expo Center (300 Jiangdong Middle Road, Jianye District, Nanjing) from November 8 to 11, 2022. The current Wire China will continue the previous product line, covering cable, wire manufacturing and finishing machinery, fastener and spring manufacturing equipment, auxiliary processing equipment, finished wire, wire and cable and raw and auxiliary materials, measurement and control technology and testing engineering and other fields. nanjing As an important hub at the intersection of the Belt and Road Initiative and an important node city along the Yangtze River Economic Belt, it is a national comprehensive industrial production base and a pilot and demonstration city of the "Made in China 2025" initiative. Nanjing is building a leading industrial development system of "advanced manufacturing + modern service + future industries", and has gathered key landmark industries such as new energy vehicles, integrated circuits and artificial intelligence. It is an important platform for the opening up and cooperation of the Yangtze River Economic Belt. wire China 2022 We will fully combine the resources advantages of the Yangtze River Delta to promote the exhibition, invite visitors, match businesses and organize activities, so as to bring high-quality exhibition experience to colleagues in the industry. "Ma

2022-09-17 The welding wire flux composition Flux function Similar to the coated electrode, the flux cored wire manufacturer has its own formula for the flux composition. The flux composition varies with the function of the welding material. The basic functions of flux components are outlined below: (1) Deoxidizer and nitrogen remover Since nitrogen and oxygen can cause pores or embrittlement of the weld metal, deoxidizers such as manganese and silicon must be added to the flux. As for the self-shielded flux-cored wire, AL should be added to the flux as a denitrification agent. The purpose of adding oxygen scavenger and nitrogen scavenger above is to purify the molten metal. ⑵ Welding slag forming agent Calcium, potassium, sodium or silicon are all welding slag forming agents. Adding to the flux can effectively protect the molten pool from atmospheric pollution. The welding slag can make the welding props have a better appearance and can support full-position welding after rapid cooling. molten pool. The coverage of the slag can further moderate the cooling rate of the filler metal, which is especially important for the welding of low alloy steels. (3) Arc stabilizer Sodium and potassium keep the arc soft and smooth and reduce spatter. ⑷Alloying elements The addition of alloying elements such as molybdenum, chromium, carbon, manganese, nickel and vanadium can increase (improve) the strength, ductility, hardness and toughness of the molten metal. ⑸ Gas former Fluorspar, limestone, etc. need to be added to the self-shielded flux-cored wire to burn to generate shielding gas. ⒊2 Types of welding slag The composition of the flux determines the welding workability of the welding material and the mechanical properties of the filler metal. If the composition of the flux is mainly acidic, acid slag will be genera