机械英语高手请进!这些句子是啥意思?2Steelsproducedtofinegrainedpractice,i.e.—(a)normalizedsteelwheretheactualMn%dividedbytheactualC%≥4;(b)controlledrolled;(c)thermo-mechanicallycontrolledrolled;or(d)grainr

Question

机械英语高手请进!这些句子是啥意思?
2 Steels produced to fine grained practice,i.e.—
(a) normalized steel where the actual Mn% divided by the actual C% ≥4;
(b) controlled rolled;
(c) thermo-mechanically controlled rolled; or
(d) grain refining elements added,e.g.aluminium or titanium (or both) 0.01% minimum.Examples are
AS 1548,Types 5 and 7,and AS 1594 grade HU 300/1.

Answer 1

2.钢材生产成优质的晶粒状态,也就是-
(a)正火钢,实际锰含量由实际≥4%碳含量部分替代.
(b)控制热轧；
(c)热机械控制热轧；或者
(d)添加晶粒纯化元素,例如最少0.01%的铝或铬（或两种）.例如如下钢材牌号AS 1548,5 和7型,以及 AS 1594 HU 300/1级.