加热时奧氏体晶粒的长大这一爐錳鋼弹簧进爐已經两个小时了,可是高温計上的指針仍然指示着780℃。这支热电偶已經使用长久了,該不会鉻鋁合金丝出毛病嗎?小王揭开爐門的窥視孔一看,啊!亮紅色的爐膛起碼有900℃了!赶紧停火出爐,检驗員跑过来将出爐的試棒一敲,断面看不到通常那种象断瓷碗似的細膩的断口,却象桔子皮那么干巴巴地布滿着粗顆粒。小黄脸色鉄青看着检驗員在 Austenite grain growth when heated This furnace manganese steel spring into the furnace has been two hours, but the pointer on the pyrometer still indicates 780 ℃. This thermocouple has been used for a long time, it will not Chromium aluminum wire problems do? Wang opened the door peephole look, ah! Bright red hearth at least 900 ℃! Quickly cease-fire baked, inspection When the run came knocking out the test stick, the cross section could not see the delicate fracture like the porcelain bowl, but it was so coarsely covered with coarse particles like orange peel. Little yellow face 鉄 green looking at the inspector at