A new type of solder was fabricated by adding microelements into tin-bismuth series solder and then being rapid cooled.The microstructure and properties were investigated. 摘要在錫鉍系焊料中加入微量元素，通過(guò)快速冷卻制成新的焊料，并對其組織與性能進(jìn)行了研究。
These two constituents form a eutectoid structure known as pearlite when the steel is cooled slowly enough to reach equilibrium, but by rapid cooling the steel is hardened. 當鋼材冷卻得足夠緩慢而達到平衡狀態(tài)時(shí)，這兩種結構會(huì )形成一種共析結構，稱(chēng)為珠光體，但如果快速冷卻，鋼材將被硬化。
