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14cr1mor matching high toughness welding rod for hydrogen steel
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A 14cr1mor, high toughness technology, used in welding equipment, welding media, welding/cutting media/materials, etc., can solve the problems of temper embrittlement and toughness reduction, and achieve improved mechanical properties, arc stability, and easy slag removal. Effect
Active Publication Date: 2021-09-21
SICHUAN XIYE NEW MATERIAL
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[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
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preparation example Construction
[0054] Second, the present invention provides a preparation method for the supporting high-toughness welding rod of heat-strength steel 14Cr1MoR for hydrogen-facing steel, comprising the following steps,
[0055] S1 Mix the skin powder evenly;
[0056] S2 Add water glass accounting for 21-23wt.% of the powder component mass content, and carry out wet mixing, wherein the potassium-sodium ratio of water glass is 1:1, and the Baume concentration is 41-43Be;
[0057] In S3, the mixture obtained in S2 is loaded on the welding core on a hydraulic welding rod machine to produce a welding rod.
[0058] The 3rd, the present invention provides the welding method of the supporting high-toughness electric welding rod of heat-strength steel 14Cr1MoR that faces hydrogen steel, comprises the following steps:
[0059] Preheat the test plate to 200~250°C before welding, dry the electrode at 380°C for no less than 1 hour before welding, keep warm at 150°C, and use it at any time. During the we...
Embodiment 1-6
[0062] The heat-strength steel 14Cr1MoR for hydrogen steel is matched with high-toughness welding electrodes, 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 mixing the ingredients of the drug skin evenly, adding water glass with a potassium-sodium ratio of 1:1 at 20°C (Baume density is 41-43Be) accounting for 21-23 wt.% of the drug skin weight. Stir evenly, send it into a hydraulic machine to wrap it on the surface of the welding core, and form the welding rod of the present invention after baking at a low temperature of 80°C and at a high temperature of 380°C.
[0065] In Examples 1-6, the mass ratio of coating and welding core is 3:7.
[0066] The welding method is as follows: preheat the test plate to 200~250°C before welding, dry the electrode at 380°C for no...
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Abstract
The invention relates to the technical field of welding materials, and discloses a 14Cr1MoR matching high-toughness welding electrode for hydrogen-facing steel, including a welding core and a coating, the welding core is made of H08E steel, and the components of the coating include carbonate 35.0 by weight percentage ~39.0%, 23.5~26.0% fluoride, 5.0~8.0% rutile, 4.0~8.0% silicon dioxide, 3.0~5.0% ferromanganese, 6.2~7.2% ferrosilicon, 2.0~3.0% ferrotitanium, 3.0~ chromium metal 5.0%, ferromolybdenum 2.0~4.0%, rare earth 1.0~2.0%, reduced iron powder 5.0~10.0%, CMC 0.6~1.0%, binder 1.0~2.0%. After heat treatment at 690°C×20h, the electrode of this application has good mechanical properties at room temperature and high temperature (380°C, 450°C, 510°C). 0.005%, X coefficient is less than 15ppm, which meets the welding requirements of 14Cr1MoR for hydrogen steel.
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...
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