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WELDING TECHNOLOGIES
AND EQUIPMENT
c) the temperature interval
between boiling and melting of
oxides (Tbo-Tmo) should be in the
temperature range from 600° to Fig. 12. Macro section
800°, i.e. the following condition of the weld obtained
must be fulfilled: 600° ≥ (Tbo-Tmo) by A-MIG steel welding
≤ 1000°; CrNi18-10 steel with
SST-13MIG flux.
d) the surface tension of the
joints, providing the best results in
MIG welding using oxides, is achieved
at a value of less than 300 mJ / m2;
d) the enthalpy of formation Fig. 11. Macro section of the
weld obtained by MIG welding
of ΔH0 298 oxides positively affects of CrNi18-10 steel.
the formation of welds in the range
of values from - 800 to J / mol to
-1000 to J / mol. It was also revealed
that the oxygen content in the oxide
(O2) affects the height of the bulge
(h) and the penetration depth (P) of
the joints, and the optimal oxygen
content in the oxide corresponds to
30 – 40 %.
2. Based on the identified requirements for the thermodynamic and physicochemical
properties of oxide fluxes for A-MIG welding of stainless steels, by example steel type CrNi18-
10, a new flux composition was developed, consisting of a mixture of oxide compounds. It
allows you to get welds with a penetration depth of 130 % more compared to welds obtained
by traditional MIG welding with the same welding parameters.

R. M. Saidov, B. Kh. Gafurov, I. G. Atabaev, F. M. Rakhimova,
D.R. Komilova, Z. S. Mukhitdinov,
Institute of Materials Science NPO Physics - the Sun
Academy of Sciences of the Republic of Uzbekistan;
Sh. A. Karimov,
Tashkent State Technical University (Uzbekistan);
Mario Kush, Peter Mayr, Kevin Hoefer,
Technical University of Chemnitz (Germany);
Huang Yong, Langzhong University of Technology (PRC).

References:
1. Makara A. M., Kushnirenko B. N., Zamkov V. N. Argon arc welding of high-strength steels of martensitic class using flux // Automatic
welding. 1968. No. 7. pp. 73 - 74.
2. Abralov M. A. et al. Arc welding method. USSR Author’s Certificate No. 1687396, 1991.
3. Saidov Rustam M., Duniachin Sergey P, Mourton Hervé, Saindrenan Guy ,: MIG welding method of articles from construction metals
(A-MIG)., June 8, 2000: WO / 2000/032345.
4. Huang Yong, Li Tao: A gas transfer flux activating TIG welding method, Patent number: ZL 201210242233.3, Publication Number:
CN102744503A, Filing Date: 07-13-2012, Publication Date 09/07/2014.
5. Karimov Sh.A., Yuldashev A.T., Song Yong Won, Kusch Mario, Mikael Borges, Saidov R.M., Mukhitdinov Z.S. Method of flux application at
arc welding of structure metals and alloys // Uzbek Patent application # IP 20110463 from November 4, 2011.
6. Gafurov B., Karimov Sh., Mukhitdinov Z., Saidov R., Song Y. W., Ko Y., Kusch M. Highly effective method of the welding of stainless steel
with dosed supply of gas-powder mixture. International scientific journal ‘’Science and World», No 8 (12), 2014, pp. 36 - 39.
7. Gafurov B. Kh., Karimov Sh. A., Saidov R. M., Mukhitdinov Z. S., Song Yong Won, Bor A. R., Kush Mario, Borges Mikael. Device for the
preparation and dosing of gas-powder mixtures. Application for patent of the Republic of Uzbekistan No. FAP 20150106 dated 08/26/2015
8. http://mathbits.com/MathBits/TISection/Statistics2/correlation.htm
9. http://chemister.ru/Database/list-substances.php?substance=F
10. G. V. Samsonov. Physico-chemical properties of oxides. Directory. Metallurgy. 1978, 465 p.
11. Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. p. 1118. ISBN 0-08-
037941-9.
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