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CN-122007714-A - E6011 type cellulose welding rod and preparation method thereof

CN122007714ACN 122007714 ACN122007714 ACN 122007714ACN-122007714-A

Abstract

The invention provides an E6011 type cellulose welding rod and a preparation method thereof, wherein the welding rod comprises a welding core and a coating, the coating is coated on the surface of the welding core in a pressing mode, and comprises, by weight, 10-15 parts of potassium titanate, 10-15 parts of rutile, 18-21 parts of microcrystalline cellulose, 3-5 parts of manganese metal, 5-10 parts of fused magnesia, 9-12 parts of iron sand, 30-35 parts of iron powder, 5-8 parts of CMC-Ca and 0.5-1 part of rare earth ferrosilicon. The coating is made of titanium slag system, and a composite blowing system is constructed to stabilize electric arc and enhance electric arc blowing force, so that welding spatter and smoke dust are reduced, the alkalinity of slag is regulated by introducing alkaline oxide and CMC-Ca, the fluidity of molten iron in vertical downward welding is effectively controlled, the process adaptability and the production convenience are considered, high-proportion iron powder is added to improve deposition efficiency, sleeve carbonization is inhibited by the synergistic effect of magnesia and iron sand, and the re-striking performance of the welding rod is improved. The invention can obviously reduce the splashing and smoke dust amount in the welding process and has excellent comprehensive welding performance.

Inventors

  • XIAO HUIYING
  • NIU YUEJUN
  • ZHANG HAIYUAN

Assignees

  • 天津市金桥焊材集团股份有限公司

Dates

Publication Date
20260512
Application Date
20260318

Claims (7)

  1. 1. An E6011 type cellulose welding rod is characterized by comprising a welding core and a coating, wherein the coating is coated on the surface of the welding core; the coating comprises, by weight, 10-15 parts of potassium titanate, 10-15 parts of rutile, 18-21 parts of microcrystalline cellulose, 3-5 parts of manganese metal, 5-10 parts of fused magnesia, 9-12 parts of iron sand, 30-35 parts of iron powder, 5-8 parts of CMC-Ca and 0.5-1 part of rare earth ferrosilicon; Wherein the microcrystalline cellulose is high-purity microcrystalline cellulose, the purity of the microcrystalline cellulose is more than or equal to 97%, S is less than or equal to 0.10%, ash content is less than or equal to 1.0%, granularity is less than or equal to 40 meshes and is more than or equal to 99%, bulk density is 150-200g/L, and whiteness is more than or equal to 75%.
  2. 2. The E6011-type cellulose welding rod as set forth in claim 1, wherein the coating comprises the following components in parts by weight: The potassium titanate is that TiO 2 ≥60%,K 2 O is more than or equal to 35%, S is less than or equal to 0.030%, P is less than or equal to 0.030%, water is less than or equal to 0.2%, granularity is more than or equal to 99% below 60 meshes, 35% below 200 meshes, and whiteness is more than or equal to 85%; The rutile TiO 2 is 70-95%, the granularity is more than or equal to 99% below 60 meshes, and less than or equal to 20% below 200 meshes; Mn is more than or equal to 99.5%, C is less than or equal to 0.01%, granularity is more than 40 meshes and less than or equal to 0.1%, and granularity is less than or equal to 15% below 200 meshes; MgO 3 is more than or equal to 98%, S is less than or equal to 0.020%, P is less than or equal to 0.020%, granularity is more than or equal to 99% below 60 meshes, and granularity is less than or equal to 30% below 120 meshes; iron sand with Fe 3 O 4 not less than 97%, S not more than 0.030%, P not more than 0.050%, granularity not less than 60 mesh not less than 99% and granularity not more than 200 mesh not more than 20%; Iron powder with Fe of 98%, granularity of 99% below 40 mesh, 25% below 160 mesh, loose density of 3.00+ -0.10 g/cm 3 and flowability of 30-35s/50g; CMC-Ca, ca is less than or equal to 10.0%, adsorbed water is less than or equal to 3%, granularity is less than or equal to 10% below 80 meshes, and viscosity of 2% aqueous solution at 20 ℃ is 800-1200aPa s; RE is 21.0-24.0%, si is less than or equal to 44.0%, mn is less than or equal to 2.5%, granularity is less than or equal to 60 meshes and less than or equal to 99%, and granularity is less than or equal to 20% and less than 200 meshes.
  3. 3. The E6011-type cellulose welding rod as set forth in claim 1, wherein the core wire is an H08A steel core and has a diameter of 3-4mm.
  4. 4. The preparation method of the E6011 type cellulose welding rod is characterized by comprising the following steps of: S1, weighing the medicine skin according to parts by weight, namely 10-15 parts of potassium titanate, 10-15 parts of rutile, 18-21 parts of microcrystalline cellulose, 3-5 parts of metal manganese, 5-10 parts of fused magnesia, 9-12 parts of iron sand, 30-35 parts of iron powder, 5-8 parts of CMC-Ca and 0.5-1 part of rare earth ferrosilicon, mixing and dry stirring, and ensuring uniform mixing of dry powder; S2, preparing the coating, namely adding the binder into the step S1, and stirring at room temperature to obtain wet mixed powder; S3, press-coating, namely press-coating the wet mixed powder obtained in the step S2 onto the surface of the welding core under a certain pressure; And S4, baking treatment, namely placing the welding rod obtained in the step S3 into an oven, and baking for 45-80min at 80-100 ℃ to obtain the E6011 type cellulose welding rod.
  5. 5. The method of manufacturing a cellulose welding rod of type E6011 as set forth in claim 4, wherein the binder used in step S2 is water glass having a parameter of K: na=2:1, a modulus of 3.1 to 3.3, and a concentration of 35 to 38 DEG Be.
  6. 6. The method of manufacturing a cellulose welding rod of type E6011 as set forth in claim 5, wherein the binder in step S2 is 55-65% of the total weight of the coating.
  7. 7. The method of manufacturing a cellulose welding rod of type E6011 as set forth in claim 4, wherein the ratio of the thickness of the skin pressure coating to the diameter of the core wire in step S3 is 0.23-0.25.

Description

E6011 type cellulose welding rod and preparation method thereof Technical Field The invention belongs to the technical field of welding materials, and particularly relates to an E6011 type cellulose welding rod and a preparation method thereof. Background The E6011 cellulose welding rod as a typical high-cellulose welding rod has the advantages of large arc blowing force, strong penetration capability, good striking and re-striking performance, adaptation to alternating current or low open circuit voltage direct current power supply, full-position welding and the like, is widely applied to the fields of pipeline, sheet structure and field installation operation, and particularly has irreplaceable advantages in field construction and engineering scenes with limited electric power conditions. However, the E6011 cellulose welding rod in the prior art generally comprises a high proportion of common cellulose organic matters and carbonate gas-making materials added into a coating, so that a large amount of shielding gas is generated in the welding process to maintain arc stability and realize deep penetration. Although the technical route can ensure the welding process performance of the welding rod, in the actual welding process, the rapid thermal cracking of cellulose organic matters and the decomposition reaction of gas-making materials often generate more welding smoke dust and splash particles, which not only results in the reduction of the visibility of the working environment and the exposure of operators to high-concentration inhalable particles and harmful gases, but also increases the cleaning workload after welding and influences the construction continuity and the field management level. In the prior art, the high-cellulose welding rod has the advantages that the arc blowing force and the vertical welding performance of the welding rod are improved by introducing cellulose organic gas generating substances, rutile and mineral arc stabilizing materials into the coating, and the technical scheme of the welding rod is focused on improving the strength, the toughness and the cracking resistance of weld metal through an alkaline slag system or a high-alloy coating system. However, the technical proposal mainly focuses on the welding process performance and construction adaptability of the welding rod, and does not purposefully optimize the problems of smoke dust and splashing generated in the welding process. The prior art lacks a cellulose welding rod technical proposal which simultaneously considers the operation environment friendliness and the construction efficiency on the premise of not reducing the arc striking performance, the arc stability and the all-position welding capability. For the above reasons, it is needed to provide a new technical solution for an E6011 cellulose welding rod, which effectively reduces welding spatter and smoke generation on the basis of maintaining excellent welding process performance and mechanical properties of the conventional E6011 welding rod, so as to meet the green construction requirement and the comprehensive requirements of environmental protection and adaptability of welding materials in complex construction environments. Disclosure of Invention In view of the above, the invention aims to provide an E6011 type cellulose welding rod and a preparation method thereof, which can effectively reduce welding spatter and smoke generation amount on the basis of ensuring excellent welding technological performance and mechanical property of welding from the aspect of a material system. In order to achieve the aim, the formulation design of the coating forms a key technical factor of the invention. The principle of action of the important components of the traditional Chinese medicine coating is as follows: the potassium titanate is used as a slag former and an arc stabilizer for reducing the arc voltage and improving the electric conductivity of the arc, thereby reducing welding spatter and improving the stability of the welding process. The rutile is used as a slag former for regulating the form of slag, has the characteristic of enabling the slag to present short slag, is beneficial to keeping a molten pool stable under the all-position welding condition of an electrode, and simultaneously enhances the arc stability and improves the arc striking performance. The microcrystalline cellulose is an organic substance, and low molecular organic compounds such as lignin, resin and the like remained in the natural cellulose are removed after purification treatment, so that the pungent odor and splashing generated by incomplete combustion of impurities in the welding process are reduced, and meanwhile, stable gas flow is generated in the reburning decomposition process, so that continuous blowing force support is provided for electric arcs. The fused magnesia is an alkaline oxide for adjusting the fluidity of slag, thereby maintaining the stability of the molten pool morphol