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 38CrSi

,合金结构钢

标准:GB/T 3077-1988

  碳 C 0.43

1.00  锰 Mn0.60

:允许残余含量≤0.035

:允许残余含量≤0.035

1.30  镍 Ni:允许残余含量≤0.030

稍好,在油中临界淬透直径达25;钢的可切削性尚好,但热处理时有回火脆性倾向,且冷变形塑性低、焊接性差。

  试样毛坯尺寸(mm  热处理:

):900  第二次淬火加热温度(  回火加热温度(;冷却剂:水、油

≥980(100)

≥835(85)

)  断面收缩率 ψ (≥50

≥55

≥69(7)

)(退火或高温回火状态):<span style="\&quot;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:" calibri\"="" lang="\&quot;EN-US\&quot;">255

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