title: ÐÐ²ÑÐ¾Ð¼Ð°ÑÐ¸ÑÐµÑÐºÐ°Ñ Ð´ÑÐ³Ð¾Ð²Ð°Ñ ÑÐ²Ð°ÑÐºÐ° Ð¿Ð¾Ð´ ÑÐ»Ð¾ÐµÐ¼ ÑÐ»ÑÑÐ° ÑÑÑÐ± Ð´Ð»Ñ Ð½ÐµÑÑÐµÐ³Ð°Ð·Ð¾Ð¿ÑÐ¾Ð²Ð¾Ð´Ð¾Ð²
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¼Ð°Ð³Ð¸ÑÑÑÐ°
titleType: Subtitle
title: Automatic arc welding under a flux layer of pipes for oil and gas pipelines
Creators: name: ÐÑÐ¸Ð½ÑÐµÐ²Ð¸Ñ, ÐÐµÐ½Ð¸Ñ
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2020
Subjects: Ð­Ð»ÐµÐºÑÑÐ¾ÑÐ²Ð°ÑÐºÐ° Ð´ÑÐ³Ð¾Ð²Ð°Ñ Ð°Ð²ÑÐ¾Ð¼Ð°ÑÐ¸ÑÐµÑÐºÐ°Ñ
ÐÐµÑÑÐµÐ¿ÑÐ¾Ð²Ð¾Ð´Ñ
ÐÐ°Ð·Ð¾Ð¿ÑÐ¾Ð²Ð¾Ð´Ñ
Ð¢ÑÑÐ±Ñ ÑÑÐ°Ð»ÑÐ½ÑÐµ ÑÐ²Ð°ÑÐ½ÑÐµ
Ð¡Ð²Ð°ÑÐ½ÑÐµ ÑÐ¾ÐµÐ´Ð¸Ð½ÐµÐ½Ð¸Ñ Ð¸ ÑÐ²Ñ
Ð¡ÑÐ°Ð»Ñ
ÑÑÑÐ±Ñ Ð±Ð¾Ð»ÑÑÐ¾Ð³Ð¾ Ð´Ð¸Ð°Ð¼ÐµÑÑÐ°
Ð¸ÑÐ¿ÑÑÐ°Ð½Ð¸Ñ Ð¾Ð±ÑÐ°Ð·ÑÐ¾Ð²
large diameter pipes
test samples

description: ÐÐ°Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¿Ð¾ÑÐ²ÑÑÐµÐ½Ð° Ð¸Ð·ÑÑÐµÐ½Ð¸Ñ ÑÐµÑÐ½Ð¾Ð»Ð¾Ð³Ð¸Ð¸ Ð¿ÑÐ¾Ð¸Ð·Ð²Ð¾Ð´ÑÑÐ²Ð° ÑÑÐ°Ð»ÑÐ½ÑÑ ÑÐ²Ð°ÑÐ½ÑÑ Ð¿ÑÑÐ¼Ð¾ÑÐ¾Ð²Ð½ÑÑ ÑÑÑÐ± Ð±Ð¾Ð»ÑÑÐ¾Ð³Ð¾ Ð´Ð¸Ð°Ð¼ÐµÑÑÐ° Ð´Ð»Ñ Ð½ÐµÑÑÐµÐ³Ð°Ð·Ð¾Ð¿ÑÐ¾Ð²Ð¾Ð´Ð¾Ð² Ð¸ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ ÑÐ²Ð¾Ð¹ÑÑÐ² ÑÐ²Ð°ÑÐ½Ð¾Ð³Ð¾ ÑÐ¾ÐµÐ´Ð¸Ð½ÐµÐ½Ð¸Ñ (Ð¼ÐµÑÐ°Ð½Ð¸ÑÐµÑÐºÐ¸Ñ ÑÐ²Ð¾Ð¹ÑÑÐ² Ð¸ Ð¼Ð¸ÐºÑÐ¾ÑÑÑÑÐºÑÑÑÑ) ÑÑÑÐ±Ñ, Ð¸Ð·Ð³Ð¾ÑÐ¾Ð²Ð»ÐµÐ½Ð½Ð¾Ð¹ Ð¸Ð· ÑÑÐ°Ð»Ð¸ ÐºÐ»Ð°ÑÑÐ° Ð¿ÑÐ¾ÑÐ½Ð¾ÑÑÐ¸ X100. ÐÐ°Ð´Ð°ÑÐ¸, ÐºÐ¾ÑÐ¾ÑÑÐµ ÑÐµÑÐ°Ð»Ð¸ÑÑ Ð² ÑÐ¾Ð´Ðµ ÑÐ°Ð±Ð¾ÑÑ: 1. ÐÐ·ÑÑÐµÐ½Ð¸Ðµ ÑÐµÑÐ½Ð¾Ð»Ð¾Ð³Ð¸ÑÐµÑÐºÐ¾Ð¹ Ð´Ð¾ÐºÑÐ¼ÐµÐ½ÑÐ°ÑÐ¸Ð¸, Ð¾Ð±Ð¾ÑÑÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ, ÑÐ¿Ð¾ÑÐ¾Ð±Ð¾Ð² ÑÐ²Ð°ÑÐºÐ¸, Ð¿ÑÐ¸Ð¼ÐµÐ½ÑÐµÐ¼ÑÑ Ð¿ÑÐ¸ Ð¿ÑÐ¾Ð¸Ð·Ð²Ð¾Ð´ÑÑÐ²Ðµ ÑÑÐ°Ð»ÑÐ½ÑÑ ÑÐ²Ð°ÑÐ½ÑÑ Ð¿ÑÑÐ¼Ð¾ÑÐ¾Ð²Ð½ÑÑ ÑÑÑÐ± Ð±Ð¾Ð»ÑÑÐ¾Ð³Ð¾ Ð´Ð¸Ð°Ð¼ÐµÑÑÐ° Ð´Ð»Ñ Ð½ÐµÑÑÐµÐ³Ð°Ð·Ð¾Ð¿ÑÐ¾Ð²Ð¾Ð´Ð¾Ð² Ð² ÑÑÐ»Ð¾Ð²Ð¸ÑÑ ÐÐ Â«ÐÐ¶Ð¾ÑÑÐºÐ¸Ð¹ ÑÑÑÐ±Ð½ÑÐ¹ Ð·Ð°Ð²Ð¾Ð´Â». 2. ÐÐ½Ð°Ð»Ð¸Ð· ÑÐ²Ð¾Ð¹ÑÑÐ² ÑÑÐ°Ð»ÐµÐ¹, Ð¿ÑÐ¸Ð¼ÐµÐ½ÑÑÑÐ¸ÑÑÑ Ð´Ð»Ñ Ð¿ÑÐ¾Ð¸Ð·Ð²Ð¾Ð´ÑÑÐ²Ð° ÑÑÑÐ± Ð±Ð¾Ð»ÑÑÐ¾Ð³Ð¾ Ð´Ð¸Ð°Ð¼ÐµÑÑÐ° Ð´Ð»Ñ Ð½ÐµÑÑÐµÐ³Ð°Ð·Ð¾Ð¿ÑÐ¾Ð²Ð¾Ð´Ð¾Ð². 3. ÐÐ½Ð°Ð»Ð¸Ð· ÑÐ²Ð°ÑÐ¸Ð²Ð°ÐµÐ¼Ð¾ÑÑÐ¸ Ð²ÑÑÐ¾ÐºÐ¾Ð¿ÑÐ¾ÑÐ½ÑÑ ÑÑÑÐ±Ð½ÑÑ ÑÑÐ°Ð»ÐµÐ¹, Ð½Ð° Ð¾ÑÐ½Ð¾Ð²Ðµ Ð½Ð°ÑÑÐ½Ð¾-ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¾Ð¹ Ð»Ð¸ÑÐµÑÐ°ÑÑÑÑ 4. ÐÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ ÑÐ²Ð¾Ð¹ÑÑÐ² ÑÐ²Ð°ÑÐ½ÑÑ ÑÐ¾ÐµÐ´Ð¸Ð½ÐµÐ½Ð¸Ð¹ ÑÑÑÐ±, Ð¸Ð·Ð³Ð¾ÑÐ¾Ð²Ð»ÐµÐ½Ð½ÑÑ Ð¸Ð· ÑÑÐ°Ð»Ð¸ ÐºÐ»Ð°ÑÑÐ° Ð¿ÑÐ¾ÑÐ½Ð¾ÑÑÐ¸ X100. Ð Ð°Ð±Ð¾ÑÐ° Ð¿ÑÐ¾Ð²ÐµÐ´ÐµÐ½Ð° Ð½Ð° Ð±Ð°Ð·Ðµ ÐÐ Â«ÐÐ¶Ð¾ÑÑÐºÐ¸Ð¹ ÑÑÑÐ±Ð½ÑÐ¹ Ð·Ð°Ð²Ð¾Ð´Â». ÐÑÐ»Ð° Ð¸Ð·ÑÑÐµÐ½Ð° ÑÐµÑÐ½Ð¾Ð»Ð¾Ð³Ð¸Ñ Ð¿ÑÐ¾Ð¸Ð·Ð²Ð¾Ð´ÑÑÐ²Ð° ÑÑÐ°Ð»ÑÐ½ÑÑ ÑÐ²Ð°ÑÐ½ÑÑ Ð¿ÑÑÐ¼Ð¾ÑÐ¾Ð²Ð½ÑÑ ÑÑÑÐ± Ð±Ð¾Ð»ÑÑÐ¾Ð³Ð¾ Ð´Ð¸Ð°Ð¼ÐµÑÑÐ° Ð´Ð»Ñ Ð½ÐµÑÑÐµÐ³Ð°Ð·Ð¾Ð¿ÑÐ¾Ð²Ð¾Ð´Ð¾Ð², Ð¿ÑÐ¸Ð¼ÐµÐ½ÑÑÑÐ°ÑÑÑ Ð½Ð° Ð´Ð°Ð½Ð½Ð¾Ð¼ Ð¿ÑÐµÐ´Ð¿ÑÐ¸ÑÑÐ¸Ð¸. ÐÐ° Ð¿ÑÐµÐ´Ð¿ÑÐ¸ÑÑÐ¸Ð¸ Ð¿ÑÐ¾Ð¸Ð·Ð²Ð¾Ð´Ð¸Ð»Ð¾ÑÑ Ð¸Ð·Ð³Ð¾ÑÐ¾Ð²Ð»ÐµÐ½Ð¸Ðµ Ð¾Ð¿ÑÑÐ½Ð¾Ð¹ ÑÐµÑÐ¸Ð¸ ÑÑÑÐ± Ð±Ð¾Ð»ÑÑÐ¾Ð³Ð¾ Ð´Ð¸Ð°Ð¼ÐµÑÑÐ° Ð¸Ð· ÑÑÐ°Ð»Ð¸ ÐºÐ»Ð°ÑÑÐ° Ð¿ÑÐ¾ÑÐ½Ð¾ÑÑÐ¸ X100, Ð¼ÐµÑÐ°Ð½Ð¸ÑÐµÑÐºÐ¸Ðµ Ð¸ÑÐ¿ÑÑÐ°Ð½Ð¸Ñ ÑÐ²Ð°ÑÐ½Ð¾Ð³Ð¾ ÑÐ¾ÐµÐ´Ð¸Ð½ÐµÐ½Ð¸Ñ Ð¸ Ð¼ÐµÑÐ°Ð»Ð»Ð¾Ð³ÑÐ°ÑÐ¸ÑÐµÑÐºÐ¾Ðµ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ Ð¿Ð¾Ð¿ÐµÑÐµÑÐ½Ð¾Ð³Ð¾ ÑÐµÑÐµÐ½Ð¸Ñ ÑÐ²Ð°ÑÐ½Ð¾Ð³Ð¾ ÑÐ¾ÐµÐ´Ð¸Ð½ÐµÐ½Ð¸Ñ. ÐÐ° Ð¾ÑÐ½Ð¾Ð²Ðµ Ð´Ð°Ð½Ð½ÑÑ Ð¾ Ð¼ÐµÑÐ°Ð½Ð¸ÑÐµÑÐºÐ¸Ñ ÑÐ²Ð¾Ð¹ÑÑÐ²Ð°Ñ ÑÐ²Ð°ÑÐ½ÑÑ ÑÐ¾ÐµÐ´Ð¸Ð½ÐµÐ½Ð¸Ð¹ ÑÑÑÐ± Ð¸ Ð¼ÐµÑÐ°Ð»Ð»Ð¾Ð³ÑÐ°ÑÐ¸ÑÐµÑÐºÐ¾Ð³Ð¾ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ, Ð¿ÑÐ¾Ð²ÐµÐ´ÐµÐ½ Ð°Ð½Ð°Ð»Ð¸Ð· ÑÐ»ÐµÐ´ÑÑÑÐ¸Ñ Ð·Ð°Ð²Ð¸ÑÐ¸Ð¼Ð¾ÑÑÐµÐ¹: Ð·Ð°Ð²Ð¸ÑÐ¸Ð¼Ð¾ÑÑÐ¸ Ð³ÐµÐ¾Ð¼ÐµÑÑÐ¸ÑÐµÑÐºÐ¸Ñ Ð¿Ð°ÑÐ°Ð¼ÐµÑÑÐ¾Ð² ÑÐ²Ð°ÑÐ½Ð¾Ð³Ð¾ ÑÐ²Ð° ÑÑÑÐ±Ñ Ð¾Ñ ÑÐµÐ¶Ð¸Ð¼Ð° ÑÐ²Ð°ÑÐºÐ¸ (Ð¿Ð¾Ð³Ð¾Ð½Ð½Ð¾Ð¹ ÑÐ½ÐµÑÐ³Ð¸Ð¸ Ð¸ ÑÐºÐ¾ÑÐ¾ÑÑÐ¸ ÑÐ²Ð°ÑÐºÐ¸), Ð°Ð½Ð°Ð»Ð¸Ð· Ð·Ð°Ð²Ð¸ÑÐ¸Ð¼Ð¾ÑÑÐ¸ ÑÐ´Ð°ÑÐ½Ð¾Ð¹ Ð²ÑÐ·ÐºÐ¾ÑÑÐ¸ Ð¾Ñ Ð´Ð¾Ð»Ð¸ ÑÑÐ°ÑÑÐ¸Ñ ÑÐ°Ð·Ð»Ð¸ÑÐ½ÑÑ Ð·Ð¾Ð½ ÑÐ²Ð°ÑÐ½Ð¾Ð³Ð¾ ÑÐ¾ÐµÐ´Ð¸Ð½ÐµÐ½Ð¸Ñ Ð½Ð° Ð»Ð¸Ð½Ð¸Ð¸ ÑÐ´Ð°ÑÐ° Ð¸ Ð°Ð½Ð°Ð»Ð¸Ð· Ð¼Ð¸ÐºÑÐ¾ÑÑÑÑÐºÑÑÑÑ ÑÐ²Ð°ÑÐ½Ð¾Ð³Ð¾ ÑÐ¾ÐµÐ´Ð¸Ð½ÐµÐ½Ð¸Ñ. ÐÑÐ±ÑÐ°Ð½ ÑÐµÐ¶Ð¸Ð¼ ÑÐ²Ð°ÑÐºÐ¸, Ð¿ÑÐ¸ ÐºÐ¾ÑÐ¾ÑÐ¾Ð¼ ÑÐ²Ð°ÑÐ½Ð¾Ðµ ÑÐ¾ÐµÐ´Ð¸Ð½ÐµÐ½Ð¸Ðµ ÑÐ´Ð¾Ð²Ð»ÐµÑÐ²Ð¾ÑÑÐµÑ ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¼ ÑÑÐµÐ±Ð¾Ð²Ð°Ð½Ð¸ÑÐ¼. ÐÑÑÐ²Ð»ÐµÐ½Ð° ÑÐ°ÑÑÑ Ð·Ð¾Ð½Ñ ÑÐµÑÐ¼Ð¸ÑÐµÑÐºÐ¾Ð³Ð¾ Ð²Ð»Ð¸ÑÐ½Ð¸Ñ Ð²Ð±Ð»Ð¸Ð·Ð¸ Ð»Ð¸Ð½Ð¸Ð¸ ÑÐ¿Ð»Ð°Ð²Ð»ÐµÐ½Ð¸Ñ Ñ ÐºÑÑÐ¿Ð½Ð¾Ð·ÐµÑÐ½Ð¸ÑÑÐ¾Ð¹ ÑÑÑÑÐºÑÑÑÐ¾Ð¹, ÐºÐ¾ÑÐ¾ÑÐ°Ñ ÑÑÑÐ´ÑÐ°ÐµÑ Ð¼ÐµÑÐ°Ð½Ð¸ÑÐµÑÐºÐ¸Ðµ ÑÐ²Ð¾Ð¹ÑÑÐ²Ð° ÑÐ²Ð°ÑÐ½Ð¾Ð³Ð¾ ÑÐ¾ÐµÐ´Ð¸Ð½ÐµÐ½Ð¸Ñ (ÑÐ´Ð°ÑÐ½ÑÑ Ð²ÑÐ·ÐºÐ¾ÑÑÑ). ÐÐ°Ð½Ð½Ð°Ñ ÑÐ°ÑÑÑ ÑÐ°Ð±Ð¾ÑÑ Ð¾ÑÑÐ°Ð¶Ð°ÐµÑ Ð½Ð°ÑÐ°Ð»ÑÐ½ÑÐ¹ ÑÑÐ°Ð¿ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ ÑÐ²Ð°ÑÐ¸Ð²Ð°ÐµÐ¼Ð¾ÑÑÐ¸ ÑÑÑÐ± Ð±Ð¾Ð»ÑÑÐ¾Ð³Ð¾ Ð´Ð¸Ð°Ð¼ÐµÑÑÐ° Ð´Ð»Ñ Ð½ÐµÑÑÐµÐ³Ð°Ð·Ð¾Ð¿ÑÐ¾Ð²Ð¾Ð´Ð¾Ð² Ð¸Ð· ÑÑÐ°Ð»Ð¸ ÐºÐ»Ð°ÑÑÐ° Ð¿ÑÐ¾ÑÐ½Ð¾ÑÑÐ¸ X100 Ð¸ ÑÐ°Ð·ÑÐ°Ð±Ð¾ÑÐºÐ¸ ÑÐµÑÐ½Ð¾Ð»Ð¾Ð³Ð¸Ð¸ ÑÐ²Ð°ÑÐºÐ¸ ÑÐ°ÐºÐ¸Ñ ÑÑÑÐ±. ÐÐ° Ð¿ÑÐµÐ´Ð¿ÑÐ¸ÑÑÐ¸Ð¸ Ð¿ÑÐ¾Ð´Ð¾Ð»Ð¶Ð°ÑÑÑÑ ÑÐ°Ð±Ð¾ÑÑ Ð¿Ð¾ ÑÐµÑÐµÐ½Ð¸Ñ ÑÑÐ¾Ð¹ Ð·Ð°Ð´Ð°ÑÐ¸.
description: This work is devoted to the study of the technology for the production of largediameter longitudinal welded steel pipes for oil and gas pipelines and to the study of the properties of the welded joint (mechanical properties and microstructure) of a pipe made of steel of strength class X100. Tasks that were solved in the course of work: 1. Study of the production technology of largediameter welded steel longitudinal pipes for oil and gas pipelines. 2. Analysis of the properties of steels used for the production of large diameter pipes for oil and gas pipelines. 3. Weldability analysis of highstrength pipe steels, based on scientific and technical literature 4. Investigation of the properties of welded joints of pipes made of steel of strength class X100. The work was carried out on the basis of JSC Â«Izhora Pipe MillÂ». The production technology of largediameter welded longitudinal steel pipes for oil and gas pipelines used at this enterprise was studied. At the enterprise, an experimental series of largediameter pipes was made of steel of strength class X100, mechanical tests of the welded joint and metallographic examination of the cross section of the welded joint were made. Based on the data on the mechanical properties of pipe welds and a metallographic study, the following dependences were analyzed: the dependences of the geometric parameters of the pipe weld on the welding mode (linear energy and welding speed), the analysis of the dependence of impact strength on the participation of different zones of the welded joint on the impact line and weld microstructure analysis. A welding mode has been selected in which the welded joint meets the technical requirements. A part of the heataffected zone was revealed near the fusion line with a coarsegrained structure, which worsens the mechanical properties of the welded joint (impact strength). This part of the work reflects the initial stage of the study of the weldability of large diameter pipes for oil and gas pipelines from steel of strength class X100 and the development of welding technology for such pipes. The company continues to work on this task.