30CrMnTi与20CrMnTi舞阳钢板图形倍尺报价，钢板热处理及金相组织正常

一、与的区别比钢的强度、淬透性高，但冲击韧性略低。主要用作渗碳钢，渗碳后可降温直接淬火，弯曲强度较高、耐磨性能好。可在淬火低温回火或调质后使用，切削加工性中等。用于制造拖拉机行业中截面较大的重负荷渗碳件及受力较大的齿轮、齿轮轴、蜗杆等。二、执行标准：GB/T  三、化学成分：碳 C硅 Si锰 Mn硫 S磷 P铬 Cr镍 Ni铜 Cu钛 Ti0.24～0.320.17～0.370.80～1.10允许残余含量≤0.035允许残余含量≤0.0351.00～1.30允许残余含量≤0.030允许残余含量≤0.0300.04～0.10四、力学性能：屈服强度σb (MPa)抗拉强度 σb (MPa)伸长率 δ5 (%)断面收缩率 ψ (%)冲击功 Akv (J)冲击韧性值 αkv (J/cm2)硬度试样尺寸≥1050≥1470(150)≥9≥40≥47≥59(6)≤229HB试样五、热处理规范及金相组织热处理规范：淬火:第一次880,第二次850,油冷;回火200,水冷、空冷。金相组织：回火马氏体。 六、交货状态以热处理（正火、退火或高温回火）或不热处理状态交货，交货状态应在合同中注明七、淬火硬度

油钢9CrMn，用880度油淬，经过两次回火，回火温度大概是300度，它的硬度值都能够到达左右。9CrMn的碳含量是0.9，而的碳含量大概是0.3左右 碳是决定材料硬度的主要元素，所以，同样的淬火温度的硬度应该要比油钢的硬度稍微低一点。但是因为里面含有钛元素，钛与碳结合能形成非常硬的碳化钛化合物，硬度高达以上。淬火回火后的硬度应该不低于HRC55，当然回火温度要300度以下。

I. and

The and of steel is than that of but the is lower. used for after can be and is wear is good.Can be used after and low .It is used for heavy load parts with large cross in and gear, gear worm, etc.

Ii. :

GB/T

Iii. :

C Si Mn S P Cr Ni Cu Ti Ti

The ≤0.035 1.00 ~ 1.30. The ≤0.030. The ≤0.030

Iv. of :

Yield (MPa), of sigma sigma b b (MPa), delta (%) of area 5 bits (%) Akv (J) value of alpha kv (J/cm2) of size

≥1050 ≥1470(150) ≥9 ≥40 ≥47 ≥59(6) ≤229HB

5. heat and

Heat : : the first 880, the 850, oil ; 200, water air .

: . 

Vi. of

in heat ( or at high ) or heat shall be in the

Vii. of

Oil steel with 880 oil, after two of about 300 its value can reach or so.The of 9CrMn is 0.9, while the of is about 0.3. is the main that the of the . the of at the same be lower than that of oil steel. and can to form very hard with a of up to .The of after and shall not be lower than of the shall be below 300 .