Scholarlink

The article is devoted to the search for temperature hardening conditions that are rational from the point of view of achieving the best combination of strength characteristics and cold resistance in steels, which is necessary for the creation of structures designed to operate in sub-zero temperatures. The structure of the steel after hardening was investigated and the amount of residual austenite was determined using optical metallography, electron microscopy, and X-ray phase analysis. Based on the results of mechanical tests, an optimal heat treatment mode was established, which ensures the best combination of strength characteristics in combination with low-temperature impact toughness at a test temperature of −70 °C (UTS ≥ 1200 MPa, YS ≥ 950 MPa, δ5 ≥ 10%, HBW ≥ 350, KCV−70 ≥ 30 J/cm2). The obtained research results can be recommended for the production of rolled metal used for the manufacture of critical, heavily loaded mechanical engineering structures, including those operated at low temperatures in the Far North and the Arctic zone.

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Study of the Formation of the Structure and Properties of Economically Alloyed Steel with Increased Strength and Cold Resistance After Hardening

  • 会议论文

  • 发表日期：

    2025年

查看全文
  • Pavel Poletskov,
  • Natalia Koptseva,
  • Yulia Efimova,
  • Alla Kuznetsova,
  • Aleksandr Gulin,
  • Daniil Alekseev,
  • Dinara Emaleeva

摘要

The article is devoted to the search for temperature hardening conditions that are rational from the point of view of achieving the best combination of strength characteristics and cold resistance in steels, which is necessary for the creation of structures designed to operate in sub-zero temperatures. The structure of the steel after hardening was investigated and the amount of residual austenite was determined using optical metallography, electron microscopy, and X-ray phase analysis. Based on the results of mechanical tests, an optimal heat treatment mode was established, which ensures the best combination of strength characteristics in combination with low-temperature impact toughness at a test temperature of −70 °C (UTS ≥ 1200 MPa, YS ≥ 950 MPa, δ5 ≥ 10%, HBW ≥ 350, KCV−70 ≥ 30 J/cm2). The obtained research results can be recommended for the production of rolled metal used for the manufacture of critical, heavily loaded mechanical engineering structures, including those operated at low temperatures in the Far North and the Arctic zone.