HEAT TREATMENT OF HIGH-STRENGTH CAST IRON VCh 50 TO IMPROVE ITS STRUCTURE

10.25712/ASTU.1811-1416.2024.04.013

Authors

  • Sergey G. Ivanov I.I. Polzunov Altai State Technical University, Lenin Pr., 46, Barnaul, 656038, Russia; Wuhan Textile University, FangZhi Road, 1, Wuhan, 430073, China https://orcid.org/0000-0002-5965-0249
  • Mikhail A. Guryev I.I. Polzunov Altai State Technical University, Lenin Pr., 46, Barnaul, 656038, Russia; Zhejiang Briliant Refrigeration Equipment Co., Ltd., Ruao Industry Park, Xingchang, Zhejiang Province, 312500, China https://orcid.org/0000-0002-9191-1787
  • Veronika V. Romanenko I.I. Polzunov Altai State Technical University, Lenin Pr., 46, Barnaul, 656038, Russia https://orcid.org/0000-0003-2444-4848
  • Mikhail N. Zenin I.I. Polzunov Altai State Technical University, Lenin Pr., 46, Barnaul, 656038, Russia
  • Alexey M. Guryev I.I. Polzunov Altai State Technical University, Lenin Pr., 46, Barnaul, 656038, Russia; Wuhan Textile University, FangZhi Road, 1, Wuhan, 430073, China https://orcid.org/0000-0002-7570-8877

Keywords:

heat treatment, ductile cast irons, graphite, modification, hardening, wear resistance, brittleness, impact strength, plasticity

Abstract

The paper presents the results of a microstructural analysis of high-strength cast iron VCh 50, obtained by casting into cold-hardening mixtures. For metallographic analysis, samples of a shot blasting blade were taken, which contained quite a lot of cementite (from 8.00 to 14.36 vol. %). At high magnification, the eutectic structure is clearly visible, which is a mixture of cementite and pearlite. Cast irons, which contain cementite along with graphite, have increased hardness, greater fragility, are poorly processed by cutting and can only be used after graphitizing annealing, which corrects this casting defect. To improve the structure, annealing was carried out at a temperature of 700 °C, which made it possible to homogenize the structural-phase state and reduce the hardness of the material by approximately 2 times. Repeated heat treatment made it possible to obtain an equilibrium structure with a martensitic matrix and to increase the plasticity and impact strength of the sample material by 20-27 %.

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Published

2024-12-23

How to Cite

Ivanov С. Г. ., Guryev М. А. ., Romanenko В. В. ., Zenin М. Н. ., & Guryev А. М. . (2024). HEAT TREATMENT OF HIGH-STRENGTH CAST IRON VCh 50 TO IMPROVE ITS STRUCTURE: 10.25712/ASTU.1811-1416.2024.04.013. Fundamental’nye Problemy Sovremennogo Materialovedenia / Basic Problems of Material Science, 21(4), 519–526. Retrieved from https://ojs.altstu.ru/index.php/fpsm/article/view/957

Issue

Vol. 21 No. 4 (2024): Fundamental’nye problemy sovremennogo materialovedenia (Basic Problems of Material Science (BPMS))

Section

SECTION 2. METAL SCIENCE AND HEAT TREATMENT OF METALS AND ALLOYS