BT3

2023-05-17 18:39:34 来源：钢铁之家阅读量：0

牌号	BT3
对应标准	BS 3100-1991 一般工程用铸钢件 Specification for Steel castings for general engineering purposes
归类	铸钢
标签	高强度铸钢

BT3 化学元素成分含量(%)

成分	P	S
最小值	-	-
最大值	0.03	0.03

①碳含量每降低0.01%，最大锰含量则增加0.04%，允许最大锰含量到1.1%
②此牌号成分使得其大截面厚度铸钢件有足够的淬透性

碳当量计算

BT3 机械性能

热处理或状态	抗拉强度 σ_b Mpa	屈服点 σ_s Mpa	断后伸长率或延伸率 δ %	冲击吸收能量 KV2 J
AH+T或OQ+T或WQ+T	≥1000	≥695	≥6	≥20

A=for anneal by heating to a temperature above the AC3 and cool in the furnace
N=for normalize by heating to a temperature above the AC3 and cool in still air
OQ=for quench into oil from a temperature above the AC3
WQ=for quench into water from a temperature above the AC3
AH=for air harden by heating to a temperature above the AC3 and cool in air at a rate fast enough to produce a hardened microstructure
T=for temper by heating to a temperature below AC1
ST=for solution treat by heating to temperature high enough to dissolve and any intermetallic phases followed by a rapid cool.

①Where, due to the mass or design, it is not practicable to liquid quench the castings, it may not be possible to achieve the specified impact properties. In such cases the values to be obtained should be agreed between the manufacturer and purchaser at the time of enquiry or order.

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