一、45#鋼板讀作：四十五號(hào)鋼
二、45#鋼板對(duì)照牌號(hào)：中國(guó)GB標(biāo)準(zhǔn)鋼號(hào)45；日本JIS標(biāo)準(zhǔn)鋼號(hào)S45C/S48C；德國(guó)DIN標(biāo)準(zhǔn)材料鋼號(hào)1.0503；德國(guó)DIN標(biāo)準(zhǔn)鋼號(hào)C45；英國(guó)BS標(biāo)準(zhǔn)鋼號(hào)IC45/080A47；法國(guó)AFNOR標(biāo)準(zhǔn)鋼號(hào)CC45,國(guó)際標(biāo)準(zhǔn)化組織ISO標(biāo)準(zhǔn)鋼號(hào)C45E4。
三、45#鋼板執(zhí)行標(biāo)準(zhǔn)：GB/T711/WTB
No. 45 steel plate as standard
四、45#鋼板的產(chǎn)地：舞陽鋼鐵
Origin of 45# steel plate: Wuyang Steel
五、45#鋼板交貨狀態(tài)：正火、回火、淬火、調(diào)質(zhì)
45# steel plate delivery status: normalizing, tempering, quenching and tempering
①、正火N：將鋼板加熱到適宜溫度在空氣中冷卻
②、回火T：將鋼板在某一適當(dāng)溫度下進(jìn)行長(zhǎng)時(shí)間保溫在冷卻
③、淬火Q是將鋼板加熱保溫和在水油或其他無機(jī)鹽等介質(zhì)中快速冷卻
④、調(diào)制：N+T 正火加回火
⑤、45號(hào)鋼淬火后沒有回火之前，硬度大于HRC55（可達(dá)HRC62)為合格。
⑥、實(shí)際應(yīng)用的硬度為HRC55（高頻淬火HRC58)。
⑦、45號(hào)鋼不要采用滲碳淬火的熱處理工藝。
六、45#鋼板Z向性能可提供Z15、Z25、Z35
45# steel Plate Z provides Z15, Z25, Z35 for performance
Z向：是厚度方向性能鋼板的俗稱對(duì)于較厚的鋼板對(duì)其厚度方向的力學(xué)性能有特殊規(guī)定
七、45#鋼板也可提供探傷：
Flaw detection is also available for 45# steel plates
超聲波檢驗(yàn)，又叫超聲波探傷，是針對(duì)鋼板內(nèi)部重量進(jìn)行檢驗(yàn)的一種方法手段，可以檢驗(yàn)鋼板內(nèi)部的缺陷如（隱蔽裂紋，氣孔，沙眼，雜質(zhì)等）分別為Ⅰ探、Ⅱ探、Ⅲ探
八、力學(xué)性能、
45#鋼板力學(xué)性能
抗拉強(qiáng)度
屈服強(qiáng)度
伸長(zhǎng)率
收縮率
沖擊功
600Mpa
355Mpa
16%
40%
39J
45#鋼板交貨狀態(tài)的溫度
正火
淬火
回火
850
840
600
45#鋼板交貨狀態(tài)硬度
熱軋鋼
退火鋼
小余229HB
小余197HB
九、化學(xué)成分
主要成分為Fe（鐵元素），且含有以下少量元素：
20#鋼板主要化學(xué)成分%
C
Si
Mn
P
0.42-0.50
0.17-0.37
0.50-0.80
0.035
S
Cr
Ni
Cu
0.035
0.25
0.25
0.25
C：碳； Si：硅； Mn：錳； P：硫；
S：磷； Cr：鉻； Ni：鎳； Cu：銅
密度7.85g/cm3，彈性模量210GPa，泊松比0.269。
十、45#鋼板特性
No. 45 steel plate characteristics commonly used carbon quenched structural steel. The steel is generally cold plastic, annealing and normalizing are better than tempering, it has higher strength and better machinability, after proper heat treatment, certain toughness, plasticity and wear resistance can be obtained, and the material source is convenient. Suitable for hydrogen welding and argon arc welding, not suitable for gas welding. It is necessary to preheat before welding and stress relief annealing after welding. Normalizing can improve the cutting performance of blanks with hardness less than 160HBS. After quenching and tempering treatment, the comprehensive mechanical properties of the steel should be optimized for other medium carbon structural steels. However, the steel has low hardenability, critical quench diameter in water is 12~17mm, and cracking tendency occurs when water quenching. When the diameter is larger than 80mm, the mechanical properties are similar after tempering or normalizing, and the medium and small die parts can obtain higher strength and toughness after tempering, while the large parts should be normalized. Therefore, this steel is usually used in the state of tempering or normalizing.
十一、.處理要求
45鋼調(diào)質(zhì)硬度在HRC20~HRC30之間；
45鋼淬火硬度在HRC55~58之間,極限值可達(dá)HRC62；