BW4_全球钢材百科网钢材化学成分-热处理-物理性能介绍-全球钢材百科网

BW4简介

牌号	BW4
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	耐磨合金铸钢

BW4 化学元素成分含量(%)

成分	C	Si	Mn	P	S	Cr	Mo
最小值	0.45	-	0.5	-	-	0.8	-
最大值	0.6	0.75	1	0.04	0.04	1.5	0.4

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% 碳当量计算

BW4 机械性能

热处理或状态	硬度 HBW
A或AH+T或OQ+T或WQ+T	≥341

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. 表中值不适用于退火状态铸件

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