Metal Science and Heat Treatment

Meleshkin, V.; Labutina, E.

doi: 10.1007/BF00706597pmid: N/A

Vashchuk, L.; Kon'ko, O.; Alekseenko, V.; Adamanova, V.

doi: 10.1007/BF00706598pmid: N/A

Dubinin, G.; Oganesyan, G.; Zhukov, V.; Boikov, V.

doi: 10.1007/BF00706599pmid: N/A

1. Diffusion chromizing of self-aligning bearings of steels ShKh15 and 95Kh18 enhances wear resistance and corrosion resistance of these steels. 2. Diffusion chromizing makes it possible to replace stainless steel 95Kh18 by the relatively cheap steel ShKh15 with better operational properties obtained after chromizing.

Protsenko, Z.; Zarubitskii, O.; Podafa, B.

doi: 10.1007/BF00706600pmid: N/A

Katkhanov, B.

doi: 10.1007/BF00706601pmid: N/A

For boriding of a small set of articles (especially of large articles) in an electrolytic boriding unit, a welded crucible made out of heat-resistance steel can be used without cathodic protection.

Kopeikin, A.; Zayats, I.

doi: 10.1007/BF00706602pmid: N/A

Kozyr'kov, V.; Kreinin, E.; Saburov, É.; Leukhin, Yu.; Ostashev, S.

doi: 10.1007/BF00706603pmid: N/A

The recuperative burner units and burners with integrated recuperators, designed at the All-Union Scientific and Production Association Soyuzpromgaz, make it possible to save up to 35% of furnace fuel. The technical documentation for the organization of their series production has been prepared.

Gavril'ev, I.; Sobolenko, T.; Yakovleva, S.

doi: 10.1007/BF00706604pmid: N/A

1. Explosive loading with p=5 and 10 GPa of specimens of St3sp and 20G2S steels leads in subsequent impact bend tests to complication of their fracture relief and to an increase in the degree of microlocal deformation, as the result of which the energy expenditure for the failure process may increase. The increase in relief is caused by complication of the trajectory of the crack, the development of which is a discrete process. The microcracks and then the main crack propagate in jump, the length of which is determined by the specific structure of the material. 2. The combination of explosive loading with subsequent heat treatment substantially increase the brittle fracture resistance of the investigated steels at low temperatures as the result of decreasing localization and more uniform occurrence of deformation and fracture. Explosive and heat treatment provides the optimum mechanical properties of steels [5, 6] and may be used when traditional methods of hardening and thermomechanical treatment are inapplicable.

Larionov, V.; Grigor'ev, R.; Yakovleva, S.; Sobolenko, T.; Gavril'ev, I.

doi: 10.1007/BF00706605pmid: N/A

1. Shock-wave treatment causes an increase in the uniformity of the ferritic matrix substructure of the investigated steel. 2. Static deformation of the explosive treated ferritic-pearlitic steel leads to substructural readjustments providing intense formation of a cellular substructure more uniform than in the original condition, which causes an increase in the strength properties of the steel. 3. The increase in uniformity of the processes and in the level of local deformations and also the formation of a complex fracture surface relief in tensile tests of the explosive treated ferritic-pearlitic steel cause an increase in the energy requirement of the fracture process, which may in turn cause an increase in the brittle fracture resistance of the steel after shock wave treatment.

Burakovsky, T.; Senatorsky, J.; Tatsikovsky, J.

doi: 10.1007/BF00706606pmid: N/A

1. The wear resistance of carburized and nitrided cases on 18KhGT steel is approximately the same, which is probably the result of the closeness of the hardnesses of these cases. 2. For the surface and near-surface zones of the nitrided and carburized cases a higher wear resistance than that of the deeper zones is, as a rule, characteristic. 3. The maximum surface pressure for carburized and nitrided cases on 18KhGT steel must be less than 400 MPa. With a pressure of 400 MPa and more seizing of the cases of both types is observed. 4. With a certain allowable wear of the parts during service carburized cases on 18KhGT steel may be replaced by nitrided.