Strengthening of the tool for cold roller rolling of corrosion-resistant pipes

The work is devoted to a topical technical problem - to increase the wear resistance of pipe tools for cold roller rolling of corrosion-resistant pipes, due to its significant cost and difficult working conditions. It is proposed to improve the technology of heat treatment of rolled tools for the pr...

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Veröffentlicht in:Metaloznavstvo ta obrobka metalìv (Online) 2022-12, Vol.104 (4), p.40-47
Hauptverfasser: V. O., Stolbovoy, G. O., Srеbryansky, L. S., Krivchik, T.S., Khokhlova, V. L., Pinchuk
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container_title Metaloznavstvo ta obrobka metalìv (Online)
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creator V. O., Stolbovoy
G. O., Srеbryansky
L. S., Krivchik
T.S., Khokhlova
V. L., Pinchuk
description The work is devoted to a topical technical problem - to increase the wear resistance of pipe tools for cold roller rolling of corrosion-resistant pipes, due to its significant cost and difficult working conditions. It is proposed to improve the technology of heat treatment of rolled tools for the production of corrosion-resistant pipes (mandrels, rollers, support strips) from steels 4Х5МФ1С and 60С2ХФА. Instead of the usual technology - tempering with tempering, tempering with tempering and subsequent ionic nitriding in plasma of two-stage vacuum-arc discharge in a modified installation "Bulat-6" in the laboratory of plasma technology. The microstructure of special samples of these steels on a scanning electron microscope (SEM) at different magnifications was studied. Their microhardness was determined using a microhardness tester PMT-3. A comparison of the microhardness of the samples after traditional treatment and the proposed. The wear resistance of the actual tool (mandrels made of 60С2ХФA steel) for cold roller rolling of particularly thin-walled corrosion-resistant pipes was studied directly during industrial tests in the factory. Studies of the microstructure on the REM of the nitrided layer after ion-plasma nitriding revealed a finely dispersed very strong ε-phase. Due to its presence in the surface layer, the surface hardness of nitrided parts increases due to the formation of stable in the process of heating carbides, nitrides, carbonitrides. Steel acquires high hardness on the surface, high wear resistance, high endurance, corrosion resistance. Tests of mandrels in the factory, which were additionally subjected to ionic nitriding, showed an increase in their stability by 25-30%. Also reduced the cost of processing the manufacture of pipes and improved the quality of the inner surface of the pipes (absence of films, cuts and other defects of corrosion-resistant pipes). Replacement of steel 60С2ХФA with secondary hardening steel 4Х5MФ1С for the manufacture of rollers and support bars in addition to improving the quality of the inner surface of the pipes increased the stability of the tool by 2.7-3 times. Keywords: rollers, support laths, mandrels, cold rolling, heat treatment, ionic nitriding.
doi_str_mv 10.15407/mom2022.04.040
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O., Stolbovoy ; G. O., Srеbryansky ; L. S., Krivchik ; T.S., Khokhlova ; V. L., Pinchuk</creator><creatorcontrib>V. O., Stolbovoy ; G. O., Srеbryansky ; L. S., Krivchik ; T.S., Khokhlova ; V. L., Pinchuk ; National Metallurgical Academy of Ukraine, Dnipro ; Institute of Solid-State Physics, Materials Science And Technologies of of the National Center of the Kharkiv Physical and Technical Institute of NAS of Ukraine, Kharkiv ; Nikopol College of National metallurgical Academy of Ukraine, Nikopol</creatorcontrib><description>The work is devoted to a topical technical problem - to increase the wear resistance of pipe tools for cold roller rolling of corrosion-resistant pipes, due to its significant cost and difficult working conditions. It is proposed to improve the technology of heat treatment of rolled tools for the production of corrosion-resistant pipes (mandrels, rollers, support strips) from steels 4Х5МФ1С and 60С2ХФА. Instead of the usual technology - tempering with tempering, tempering with tempering and subsequent ionic nitriding in plasma of two-stage vacuum-arc discharge in a modified installation "Bulat-6" in the laboratory of plasma technology. The microstructure of special samples of these steels on a scanning electron microscope (SEM) at different magnifications was studied. Their microhardness was determined using a microhardness tester PMT-3. A comparison of the microhardness of the samples after traditional treatment and the proposed. The wear resistance of the actual tool (mandrels made of 60С2ХФA steel) for cold roller rolling of particularly thin-walled corrosion-resistant pipes was studied directly during industrial tests in the factory. Studies of the microstructure on the REM of the nitrided layer after ion-plasma nitriding revealed a finely dispersed very strong ε-phase. Due to its presence in the surface layer, the surface hardness of nitrided parts increases due to the formation of stable in the process of heating carbides, nitrides, carbonitrides. Steel acquires high hardness on the surface, high wear resistance, high endurance, corrosion resistance. Tests of mandrels in the factory, which were additionally subjected to ionic nitriding, showed an increase in their stability by 25-30%. Also reduced the cost of processing the manufacture of pipes and improved the quality of the inner surface of the pipes (absence of films, cuts and other defects of corrosion-resistant pipes). Replacement of steel 60С2ХФA with secondary hardening steel 4Х5MФ1С for the manufacture of rollers and support bars in addition to improving the quality of the inner surface of the pipes increased the stability of the tool by 2.7-3 times. 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S., Krivchik</creatorcontrib><creatorcontrib>T.S., Khokhlova</creatorcontrib><creatorcontrib>V. L., Pinchuk</creatorcontrib><creatorcontrib>National Metallurgical Academy of Ukraine, Dnipro</creatorcontrib><creatorcontrib>Institute of Solid-State Physics, Materials Science And Technologies of of the National Center of the Kharkiv Physical and Technical Institute of NAS of Ukraine, Kharkiv</creatorcontrib><creatorcontrib>Nikopol College of National metallurgical Academy of Ukraine, Nikopol</creatorcontrib><title>Strengthening of the tool for cold roller rolling of corrosion-resistant pipes</title><title>Metaloznavstvo ta obrobka metalìv (Online)</title><description>The work is devoted to a topical technical problem - to increase the wear resistance of pipe tools for cold roller rolling of corrosion-resistant pipes, due to its significant cost and difficult working conditions. It is proposed to improve the technology of heat treatment of rolled tools for the production of corrosion-resistant pipes (mandrels, rollers, support strips) from steels 4Х5МФ1С and 60С2ХФА. Instead of the usual technology - tempering with tempering, tempering with tempering and subsequent ionic nitriding in plasma of two-stage vacuum-arc discharge in a modified installation "Bulat-6" in the laboratory of plasma technology. The microstructure of special samples of these steels on a scanning electron microscope (SEM) at different magnifications was studied. Their microhardness was determined using a microhardness tester PMT-3. A comparison of the microhardness of the samples after traditional treatment and the proposed. The wear resistance of the actual tool (mandrels made of 60С2ХФA steel) for cold roller rolling of particularly thin-walled corrosion-resistant pipes was studied directly during industrial tests in the factory. Studies of the microstructure on the REM of the nitrided layer after ion-plasma nitriding revealed a finely dispersed very strong ε-phase. Due to its presence in the surface layer, the surface hardness of nitrided parts increases due to the formation of stable in the process of heating carbides, nitrides, carbonitrides. Steel acquires high hardness on the surface, high wear resistance, high endurance, corrosion resistance. Tests of mandrels in the factory, which were additionally subjected to ionic nitriding, showed an increase in their stability by 25-30%. Also reduced the cost of processing the manufacture of pipes and improved the quality of the inner surface of the pipes (absence of films, cuts and other defects of corrosion-resistant pipes). Replacement of steel 60С2ХФA with secondary hardening steel 4Х5MФ1С for the manufacture of rollers and support bars in addition to improving the quality of the inner surface of the pipes increased the stability of the tool by 2.7-3 times. 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S., Krivchik</creatorcontrib><creatorcontrib>T.S., Khokhlova</creatorcontrib><creatorcontrib>V. L., Pinchuk</creatorcontrib><creatorcontrib>National Metallurgical Academy of Ukraine, Dnipro</creatorcontrib><creatorcontrib>Institute of Solid-State Physics, Materials Science And Technologies of of the National Center of the Kharkiv Physical and Technical Institute of NAS of Ukraine, Kharkiv</creatorcontrib><creatorcontrib>Nikopol College of National metallurgical Academy of Ukraine, Nikopol</creatorcontrib><collection>CrossRef</collection><jtitle>Metaloznavstvo ta obrobka metalìv (Online)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>V. O., Stolbovoy</au><au>G. O., Srеbryansky</au><au>L. S., Krivchik</au><au>T.S., Khokhlova</au><au>V. L., Pinchuk</au><aucorp>National Metallurgical Academy of Ukraine, Dnipro</aucorp><aucorp>Institute of Solid-State Physics, Materials Science And Technologies of of the National Center of the Kharkiv Physical and Technical Institute of NAS of Ukraine, Kharkiv</aucorp><aucorp>Nikopol College of National metallurgical Academy of Ukraine, Nikopol</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Strengthening of the tool for cold roller rolling of corrosion-resistant pipes</atitle><jtitle>Metaloznavstvo ta obrobka metalìv (Online)</jtitle><date>2022-12-30</date><risdate>2022</risdate><volume>104</volume><issue>4</issue><spage>40</spage><epage>47</epage><pages>40-47</pages><issn>2073-9583</issn><eissn>2664-2441</eissn><abstract>The work is devoted to a topical technical problem - to increase the wear resistance of pipe tools for cold roller rolling of corrosion-resistant pipes, due to its significant cost and difficult working conditions. It is proposed to improve the technology of heat treatment of rolled tools for the production of corrosion-resistant pipes (mandrels, rollers, support strips) from steels 4Х5МФ1С and 60С2ХФА. Instead of the usual technology - tempering with tempering, tempering with tempering and subsequent ionic nitriding in plasma of two-stage vacuum-arc discharge in a modified installation "Bulat-6" in the laboratory of plasma technology. The microstructure of special samples of these steels on a scanning electron microscope (SEM) at different magnifications was studied. Their microhardness was determined using a microhardness tester PMT-3. A comparison of the microhardness of the samples after traditional treatment and the proposed. The wear resistance of the actual tool (mandrels made of 60С2ХФA steel) for cold roller rolling of particularly thin-walled corrosion-resistant pipes was studied directly during industrial tests in the factory. Studies of the microstructure on the REM of the nitrided layer after ion-plasma nitriding revealed a finely dispersed very strong ε-phase. Due to its presence in the surface layer, the surface hardness of nitrided parts increases due to the formation of stable in the process of heating carbides, nitrides, carbonitrides. Steel acquires high hardness on the surface, high wear resistance, high endurance, corrosion resistance. Tests of mandrels in the factory, which were additionally subjected to ionic nitriding, showed an increase in their stability by 25-30%. Also reduced the cost of processing the manufacture of pipes and improved the quality of the inner surface of the pipes (absence of films, cuts and other defects of corrosion-resistant pipes). Replacement of steel 60С2ХФA with secondary hardening steel 4Х5MФ1С for the manufacture of rollers and support bars in addition to improving the quality of the inner surface of the pipes increased the stability of the tool by 2.7-3 times. 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