Investigation of surfaced press molds made its working resource

Authors

DOI:

https://doi.org/10.15587/2312-8372.2017.105637

Keywords:

plasma-MIG surfacing, flux-cored wire, structural heterogeneity of surfaced metal, working capacity of press molds

Abstract

The object of research is the repair of press molds with the help of plasma-MIG surfacing. The weld metal on the repaired press molds wears out unevenly, has a different structure and hardness, which is characteristic of multi-layer surfacing of alloyed steels. The greatest way to manage the storage and quality of surfacing is a combined method – plasma-MIG surfacing. An analysis is made of all plasma-MIG surfacing options for surfacing in order to strengthen the surfaces in the repair and manufacture of products operating under thermal cyclic loads. It is established that when restoring press molds working under thermocyclic loads, to ensure uniform hardness over the cross-section of the welded metal layer, the surfacing should be carried out with a minimum step in the optimum operating regime: aН=16-19 g/A.h. yB.S=4–5 %; KV=91 %. It has been experimentally proved that in order to reduce the width of the eutectic sections that is distinguished along the grain boundaries, and hence also the decrease in the probability of crack formation in the deposited layer, the plasma-MIG surfacing on the developed unit should be carried out at the lowest possible current I=75–90 A. This will significantly increase the crystallization rate of the deposited metal.

Author Biography

Inna Blokhina, Donbass State Machine-Building Academy, 72, Academicheskaya (Shkadinova) str., Kramatorsk, Donetsk region, Ukraine, 84313

Postgraduate Student

Department of Equipment and Technologies of Welding Production

References

  1. Vlasov, A. F., Kuznetsov, V. D., Makarenko, N. O., Bohutskyi, O. A. (2010). Naplavlennia. Kramatorsk, 332.
  2. Chyharov, V. V., Makarenko, N. O., Kondrashov, K. A. (2001). Doslidzhennia strukturnoi neodnoridnosti naplavlenoho metalu i yii vplyv na pratsezdatnist pres-form. Pratsi 11 Mizhnarodnoi naukovoi konferentsii «Suchasni problemy elektrometalurhii stali», 102–103.
  3. Makarenko, N. O. (1998). Udoskonalennia plazmotrona i ustanovky dlia plazmovoho naplavlennia. Avtomaticheskaia svarka, 1, 40–43.
  4. Makarenko, N., Kondrashov, K. (2001). Vosstanovlenie i ukreplenie shtampov i press-form. Sovershenstvovanie protsessov i oborudovaniia obrabotki davleniem v metallurii i mashinostroenii, 101–103.
  5. Makarenko, A., Chigariov, V., Kondrashov, K. (2001). Issledovanie strukturnoi neodnorodnosti naplavlennogo metalla i ego vliianie na rabotosposobnost' press-form. Tezisy dokladov XI mezhdunarodnoi nauchnoi konferentsii. – Cheliabinsk, 102–103.
  6. Makarenko, A., Kornienko, A., Kondrashov, K. (2001). Preimushchestva ukrepleniia i vosstanovleniia press-form dlia stekla sposobom plazma-MIG naplavki. Materialy mezhdunarodnoi nauchno-tehnicheskoi konferentsii «Inzheneriia poverhnosti i renovatsiia izdelii». Feodosiia, 126–128.
  7. North, R. W. (1980). Molded curved drums and molds therefor. The Journal of the Acoustical Society of America, 67 (6), 2132–2132. doi:10.1121/1.384363
  8. Zu-bao, Z. (1986). Micro-beam plasma arc powder surfacing. Advances in Thermal Spraying. Elsevier, 727–736. doi:10.1016/b978-0-08-031878-3.50080-0
  9. Zhu, S., Guo, Y., Yang, P. (2005). Remanufacturing system based on totally automatic MIG surfacing via robot. Journal of Central South University of Technology, 12 (2), 129–132. doi:10.1007/s11771-005-0024-y
  10. Zu-bao, Z. (1986). Micro-beam plasma arc powder surfacing. Advances in Thermal Spraying, 727–736. doi:10.1016/b978-0-08-031878-3.50080-0
  11. Chyharov, V. V., Makarenko, N. O., Kondrashov, O. V., Hranovskyi, O. V., Hranovskyi, M. O. (15.07.2003). Ustanovka dlia plazmovoho naplavlennia. Patent of Ukraine № 58462A: MKI V23K9/04. Appl. № 20021210534. Filed 24.12.2002. Bull. № 7, 5.
  12. Chyharov, V. V., Makarenko, N. O., Kondrashov, K. O., Hranovskyi, O. V. (17.09.2001). Zvariuvalna ustanovka. Patent of Ukraine № 41618: MKI V23K9/00. Appl. № 2000116282. Filed 07.11.2000. Bull. № 8, 4.
  13. Chyharov, V. V., Makarenko, N. O., Kondrashov, K. O., Hranovskii, M. O. (15.07.2002). Ustanovka plazmovoho naplavlennia. Patent of Ukraine № 47627A MKI V23K10/10: MKI V23K10/10. Appl. № 2001053573. Filed 15.05.2001. Bull. № 7, 4.

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Published

2017-05-30

How to Cite

Blokhina, I. (2017). Investigation of surfaced press molds made its working resource. Technology Audit and Production Reserves, 3(1(35), 34–38. https://doi.org/10.15587/2312-8372.2017.105637

Issue

Vol. 3 No. 1(35) (2017): Industrial and Technology Systems

Section

Materials Science: Original Research

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Copyright (c) 2017 Inna Blokhina

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