ASM Metals HandBook P12

Chia sẻ: A Ly | Ngày: | Loại File: PDF | Số trang:10

lượt xem

ASM Metals HandBook P12

Mô tả tài liệu
  Download Vui lòng tải xuống để xem tài liệu đầy đủ

Critical Cooling Rate at 550 °C (1020 °F) (Tc). A critical cooling rate exists for each steel composition. If the actualcooling rate in the weld metal exceeds this critical value, then hard martensitic structures may develop in the HAZ, and there is a great risk of cracking under the influence of thermal stresses in the presence of hydrogen. The best way to determine the critical cooling rate is to make a series of bead-on-plate weld passes in which all parameters, except the arc travel speed, are held constant. ...

Chủ đề:

Nội dung Text: ASM Metals HandBook P12

Đồng bộ tài khoản