High-toughness welding electrode matched with 14Cr1MoR for hydrogen steel

A 14cr1mor, hydrogen-in-steel technology, applied in welding media, welding equipment, welding/cutting media/materials, etc., can solve the problems of temper embrittlement, decreased toughness, etc., and achieve improved mechanical properties, arc stability, and reasonable control. Effect

Active Publication Date: 2021-08-13
SICHUAN XIYE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] 1.25Cr~0.5Mo steel belongs to the heat-strength steel with ferrite-pearlite structure, which has high heat strength and oxidation resistanc

Method used

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  • High-toughness welding electrode matched with 14Cr1MoR for hydrogen steel
  • High-toughness welding electrode matched with 14Cr1MoR for hydrogen steel
  • High-toughness welding electrode matched with 14Cr1MoR for hydrogen steel

Examples

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Example Embodiment

[0054] Second, the present invention provides a method for preparing a high-toughness electric welding rod for heat-strength steel 14Cr1MoR for hydrogen steel, comprising the following steps:

[0055] S1 Mix the medicine skin powder evenly;

[0056] S2 Add water glass with a mass content of 21~23wt.% of the powder components, and perform wet mixing, wherein the potassium-sodium ratio of the water glass is 1:1, and the Baume concentration is 41~43Be;

[0057] S3 is on a hydraulic electrode machine, and the mixture obtained in S2 is loaded on the welding core to prepare an electrode.

[0058] Thirdly, the present invention provides a welding method for a high-toughness electric welding rod matched with a heat-strength steel 14Cr1MoR for a hydrogen-intensive steel, including the following steps:

[0059] The test plate is preheated to 200~250℃ before welding, and the electrode is dried at 380℃ for not less than 1h before welding, and the heat preservation at 150℃ is used as need...

Example Embodiment

[0061] Examples 1-6

[0062] The heat-strength steel 14Cr1MoR used in the hydrogenation steel is equipped with a high-toughness electrode, including the welding core and the coating covering the surface of the welding core. The components of the coating are shown in Table 1.

[0063] The chemical composition of the solder core is shown in Table 2.

[0064] The preparation method is as follows: after the ingredients of the drug skin are evenly mixed, adding water glass (the Baume density is 41-43Be) with a potassium-sodium ratio of 1:1 under the condition of 21-23 wt.% of the drug skin's weight Stir evenly, send it to a hydraulic press to wrap it on the surface of the welding core, and bake at a low temperature of 80° C. and a high temperature of 380° C. to form the welding rod of the present invention.

[0065] In Examples 1-6, the mass ratio of the coating to the core is 3:7.

[0066] The welding method is: preheating the test plate to 200~250℃ before welding, drying the el...

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Abstract

The invention relates to the technical field of welding materials, and discloses a high-toughness welding electrode matched with 14Cr1MoR for hydrogen steel. The high-toughness welding electrode comprises a core wire and a coating, the core wire adopts H08E steel, and components of the coating comprise, by weight percent, 35.0%-39.0% of carbonate, 23.5%-26.0% of fluoride, 5.0%-8.0% of rutile, 4.0%-8.0% of silicon dioxide, 3.0%-5.0% of ferromanganese, 6.2%-7.2% of ferrosilicon, 2.0%-3.0% of ferrotitanium, 3.0%-5.0% of chromium metal, 2.0%-4.0% of ferromolybdenum, 1.0%-2.0% of rare earth, 5.0%-10.0% of reduced iron powder, 0.6%-1.0% of CMC and 1.0%-2.0% of a binder. After the welding electrode is subjected to 690 DEG C*20 h heat treatment, the mechanical property at the normal temperature and the high temperature (380 DEG C, 450 DEG C and 510 DEG C) is good, the impact absorption energy at the temperature of -20 DEG C is larger than or equal to 100 J, the contents of deposited metal As, Sn and Sb are all smaller than 0.005%, the X coefficient is smaller than 15 ppm, and the welding requirement of the 14Cr1MoR for the hydrogen steel is met.

Description

technical field [0001] The invention belongs to the technical field of welding materials, and in particular relates to a 14Cr1MoR matching high-toughness welding electrode for hydrogen-facing steel. Background technique [0002] With the rapid development of my country's petroleum and chemical industries, pressure-bearing equipment is also developing in the direction of large-scale, lightweight, high-parameter, and long-life. It is especially critical to determine the ultimate performance of the pressure equipment. [0003] 1.25Cr~0.5Mo steel belongs to the heat-strength steel with ferrite-pearlite structure, which has high heat strength and oxidation resistance at high temperature, but temper embrittlement will occur if it works for a long time in the temperature range of 375~575°C and reduced toughness. In recent years, major steel mills have greatly improved the performance of domestic steel by controlling the content of impurity elements P, As, Sn, and Sb, and can repla...

Claims

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Application Information

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IPC IPC(8): B23K35/30B23K35/365
CPCB23K35/0272B23K35/3073B23K35/3602B23K35/365
Inventor 康丹丹
Owner SICHUAN XIYE NEW MATERIAL
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