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BT3簡(jiǎn)介

牌號(hào) BT3
對(duì)應(yīng)標(biāo)準(zhǔn) BS 3100-1991
一般工程用鑄鋼件
Specification for Steel castings for general engineering purposes
歸類 鑄鋼
標(biāo)簽 高強(qiáng)度鑄鋼
BT3 化學(xué)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%，最大錳含量則增加0.04%，允許最大錳含量到1.1%
②此牌號(hào)成分使得其大截面厚度鑄鋼件有足夠的淬透性 碳當(dāng)量計(jì)算
BT3 機(jī)械性能
熱處理或狀態(tài)
抗拉強(qiáng)度
σb
Mpa 		屈服點(diǎn)
σs
Mpa 		斷后伸長(zhǎng)率或延伸率
δ
% 		沖擊吸收能量
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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