Đánh giá phê phán về hàn chấm thép ô tô: quy trình, cấu trúc và tính chất
Tóm tắt
Hàn chấm, đặc biệt là hàn chấm điện trở (RSW), là một quy trình nối quan trọng trong ngành công nghiệp ô tô. Sự phát triển của các loại thép siêu cường độ cao cho các ứng dụng trong ngành công nghiệp ô tô đi kèm với thách thức là hiểu rõ hơn về kim loại học vật lý và cơ học của các vật liệu này trong quá trình RSW. Bài báo này xem xét một cách phê phán hiểu biết cơ bản về mối quan hệ giữa cấu trúc và tính chất trong các mối hàn chấm thép ô tô. Điểm chú ý là các đặc tính kim loại học, sự tương quan giữa độ cứng và vi cấu trúc, sự chuyển đổi giữa các chế độ hỏng liên kết và kéo ra, cũng như hiệu suất cơ học của các mối hàn chấm thép dưới các điều kiện tải trọng tĩnh gần, mệt mỏi và va đập. Một cái nhìn tổng quan ngắn gọn về hàn chấm bằng quay ma sát, như một sự thay thế cho RSW, cũng được bao gồm.
Từ khóa
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