![](https://static.youtibao.com/asksite/comm/h5/images/m_q_title.png)
[单选题]
A-C-A-006 2 2 3热轧钢筋的接头,应采用电焊焊接,并以闪光对焊为主。仅在确无条件施行焊接时,对直径在 )及以下的钢筋,方可采用绑扎搭接()
A.16mm
B.20mm
C.25mm
D.28mm
![](https://static.youtibao.com/asksite/comm/h5/images/m_q_a.png)
C、25mm
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
A.16mm
B.20mm
C.25mm
D.28mm
C、25mm
A.5
B.2
C.4
D.3
截面(1-1剖面):
(1)用普通轧制工字钢;
(2)用热轧H型钢;
(3)用焊接工字形截面,翼缘板为焰切边。
(1)在相同含碳量情况下,除了含Ni和Mn的合金钢外,大多数合金钢的热处理加热温度都比碳钢高;
(2)在相同含碳量情况下,含碳化物形成元素的合金钢比碳钢具有较高的回火稳定性;
(3)高速钢在热轧或热锻后,在空气中冷却获得马氏体组织。
A.(1)(2)
B.(1)(2)(3)
C.(1)(2)(4)
D.(1)(2)(3)(4)
A.1%;3%
B.2%;3%
C.1%;2%
D.1%;1.5%