题目内容
对同一种钢而言，奥氏体晶粒细小，冷却后的组织也细小，其强度和塑、韧性也较好
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热处理是将钢在液态下采取特定的加热、保温、冷却方法，控制其相变过程，以获得工程上所需的组织、结构、性能的一种工艺过程。
Of all the notable mountains in China, Mount Huangshan in the south of Anhui province, is probably the most famous.
All stones on the mountain will inspire the imagination.
You will be excited by the beauty when all the red leaves are floating on the white clouds in autumn.
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