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Price: Power
Product: Calcium Carbide
Quantity: 150.00 mt
Area: China,Zhejiang,Jiaxing
Validity: 5/29/2015
Calcium Carbide Products

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Contact:马小姐
Mobile:17095159982
Email:960476346@qq.com
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<p style="margin: 0px; padding: 0px 12px; outline: 0px; text-indent: 2em; color: rgb(0, 0, 0); font-family: Arial, Helvetica, sans-serif; line-height: 24px;"> 20钢<span style="margin: 0px; padding: 0px; outline: 0px; font-size: 14px; font-family: arial, sans-serif; line-height: 25px;">的20是指含碳量,含碳量为0.2%,属于</span>低碳钢<span style="margin: 0px; padding: 0px; outline: 0px; font-size: 14px; font-family: arial, sans-serif; line-height: 25px;">。钢中可分为低碳钢、中碳钢和高碳钢</span>中碳钢<span style="margin: 0px; padding: 0px; outline: 0px; font-size: 14px; font-family: arial, sans-serif; line-height: 25px;">--含碳量一般在0.25~0.60%之间;高碳钢--含碳量一般大于0.60%</span></p> <p style="margin: 0px; padding: 0px 12px; outline: 0px; text-indent: 2em; color: rgb(0, 0, 0); font-family: Arial, Helvetica, sans-serif; line-height: 24px;"> &nbsp;</p> <p style="margin: 0px; padding: 0px 12px; outline: 0px; font-size: 14px; text-indent: 2em; color: rgb(0, 0, 0); line-height: 24px; font-family: arial, sans-serif;"> 20钢的20是指含碳量,含碳量为0.2%,属于低碳钢。</p> <p style="margin: 0px; padding: 0px 12px; outline: 0px; font-size: 14px; text-indent: 2em; color: rgb(0, 0, 0); line-height: 24px; font-family: arial, sans-serif;"> <img src="http://i3.qhimg.com/dr/200__/t01b8b619e3ce4aaed0.jpg" style="margin: 0px; padding: 0px; outline: 0px; border: none;" />钢中可分为低碳钢、中碳钢和高碳钢。</p> <p style="margin: 0px; padding: 0px 12px; outline: 0px; font-size: 14px; text-indent: 2em; color: rgb(0, 0, 0); line-height: 24px; font-family: arial, sans-serif;"> 低碳钢--含碳量一般小于0.25%;</p> <p style="margin: 0px; padding: 0px 12px; outline: 0px; font-size: 14px; text-indent: 2em; color: rgb(0, 0, 0); line-height: 24px; font-family: arial, sans-serif;"> 中碳钢--含碳量一般在0.25~0.60%之间;</p> <p style="margin: 0px; padding: 0px 12px; outline: 0px; font-size: 14px; text-indent: 2em; color: rgb(0, 0, 0); line-height: 24px; font-family: arial, sans-serif;"> 高碳钢--含碳量一般大于0.60%。</p> <p style="margin: 0px; padding: 0px 12px; outline: 0px; font-size: 14px; text-indent: 2em; color: rgb(0, 0, 0); line-height: 24px; font-family: arial, sans-serif;"> 钢中除含有碳(C)元素和为脱氧而含有一定量硅(Si)(一般不超过0.40%),锰(Mn)(一般不超过0.80%,较高可到1.20%)合金元素外,不含其他合金元素(残余元素除外)。</p> <p style="margin: 0px; padding: 0px 12px; outline: 0px; font-size: 14px; text-indent: 2em; color: rgb(0, 0, 0); line-height: 24px; font-family: arial, sans-serif;"> 含碳量低于2.1%为钢,含碳量高于2.1%为铁。</p> <p style="margin: 0px; padding: 0px 12px; outline: 0px; font-size: 14px; text-indent: 2em; color: rgb(0, 0, 0); line-height: 24px; font-family: arial, sans-serif;"> 钢中含碳量越高其韧性越差,铁中含碳量越高其韧性越好。</p> <div style="margin: -7px 0px 0px; padding: 0px; outline: 0px; font-size: 14px; color: rgb(0, 0, 0); line-height: 24px; font-family: arial, sans-serif;"> <p style="margin: 0px; padding: 0px 12px; outline: 0px; text-indent: 2em;"> 1)特性 该钢属于优质低碳碳素钢,冷挤压、渗碳淬硬钢。该钢强度低,韧性、塑性和焊接性均好。抗拉强度为253-500MPa,伸长率&ge;24%。</p> <p style="margin: 0px; padding: 0px 12px; outline: 0px; text-indent: 2em;"> 20特性与15钢基本相仿,但强度稍高。用途:适用于制造汽车、拖拉机及一般机械制造业中建造不太重要的中小型渗碳碳氮共渗等零件,如汽车上的手刹蹄片、杠杆轴、变速箱速叉、传动被动齿轮及拖拉机上凸轮轴、悬挂均衡器轴、均衡器内外衬套等;在热轧或正火状态下用于制造受力不大,而要求韧性高的各种机械零件;在重、中型机械制造业中,如锻制或压制的拉杆、钩环、杠杆、套筒、夹具等。在汽轮机和锅炉制造业中多用于压力&le;6N/平方,温度&le;450℃的非腐化介质中工作的管子、法兰、联箱及各种紧固件;在铁路、机车车辆上用于制造十字头、活塞等铸件。</p> <p style="margin: 0px; padding: 0px 12px; outline: 0px; text-indent: 2em;"> 正火可促进该钢球化,细化大块状先共析铁素体,改进小于160HBS毛坯的切削性能。</p> <p style="margin: 0px; padding: 0px 12px; outline: 0px; text-indent: 2em;"> 该钢模具零件工艺路线为:下料&rarr;锻造模坯&rarr;退火&rarr;机械粗加工&rarr;冷挤压成型&rarr;再结晶退火&rarr;机械精加工&rarr;渗碳&rarr;淬火、回火&rarr;研磨抛光&rarr;装配。</p> <p style="margin: 0px; padding: 0px 12px; outline: 0px; text-indent: 2em;"> (2)供货状态及硬度 未热处理态,硬度&le;156HBS。</p> </div> <h3 style="margin: 0px; padding: 0px; outline: 0px; font-size: 14px; width: 942px; height: 31px; background-image: url(http://www.zcwz.com/gonghuo/images/bg3.gif); line-height: 31px; color: rgb(57, 57, 57); font-weight: 500; font-family: arial, sans-serif; background-repeat: repeat no-repeat;"> <span style="margin: 0px 0px 0px 10px; padding: 0px; outline: 0px; font-size: 18px; font-family: 'microsoft yahei', Arial, Helvetica, sans-serif;">化学成分</span>折叠</h3> <div style="margin: -7px 0px 0px; padding: 0px; outline: 0px; font-size: 14px; color: rgb(0, 0, 0); line-height: 24px; font-family: arial, sans-serif;"> <p style="margin: 0px; padding: 0px 12px; outline: 0px; text-indent: 2em;"> (3)标准JB/T 6057-92钢的化学成分(质量分数,%) C 0.17~0.23、Si 0.17~0.37、Mn 0.35~0.65、P&le;0.035、S&le;0.035、Ni&le;0.30、Cr&le;0.25、Cu&le;0.25。</p> <p style="margin: 0px; padding: 0px 12px; outline: 0px; text-indent: 2em;"> (4)参考对应钢号 我国GB/JB的标准钢号是20、我国台湾CNS标准钢号S20C、德国DIN标准材料编号1.0402、德国DIN标准钢号CK22/C22、英国BS标准钢号IC22、法国AFNOR标准钢号CC20、法国NF标准钢号C22、意大利UNI标准钢号C20/C21、比利时NBN标准钢号C25-1、瑞典SS标准钢号1450、西班牙UNE标准钢号F.112、美国AISI/SAE标准钢号1020、日本JIS标准钢号S20C/S22C。</p> </div> <h3 style="margin: 0px; padding: 0px; outline: 0px; font-size: 14px; width: 942px; height: 31px; background-image: url(http://www.zcwz.com/gonghuo/images/bg3.gif); line-height: 31px; color: rgb(57, 57, 57); font-weight: 500; font-family: arial, sans-serif; background-repeat: repeat no-repeat;"> <span style="margin: 0px 0px 0px 10px; padding: 0px; outline: 0px; font-size: 18px; font-family: 'microsoft yahei', Arial, Helvetica, sans-serif;">力学性能</span>折叠</h3> <div style="margin: -7px 0px 0px; padding: 0px; outline: 0px; font-size: 14px; color: rgb(0, 0, 0); line-height: 24px; font-family: arial, sans-serif;"> <p style="margin: 0px; padding: 0px 12px; outline: 0px; text-indent: 2em;"> (5)相变点温度(近似值)Ac1=735℃,Ac3=855℃,Ar3=835℃,Ar1=680℃</p> <p style="margin: 0px; padding: 0px 12px; outline: 0px; text-indent: 2em;"> (6)正火规范 温度920~950℃,出炉空冷。硬度131~156HBS。</p> <p style="margin: 0px; padding: 0px 12px; outline: 0px; text-indent: 2em;"> (7)冷压毛坯软化处理规范 温度700~720℃,保温时间8~15h,再以50~100℃/h的冷速,随炉降至温度&le;550~600℃,出炉空冷。</p> <p style="margin: 0px; padding: 0px 12px; outline: 0px; text-indent: 2em;"> 处理前硬度&le;143HBS,软化后硬度&le;131HBS。</p> <p style="margin: 0px; padding: 0px 12px; outline: 0px; text-indent: 2em;"> (8)淬火规范 温度910℃&plusmn;10℃,10%NaCl盐水冷却。</p> <p style="margin: 0px; padding: 0px 12px; outline: 0px; text-indent: 2em;"> (9)实测屈服强度fy=275Mpa,弹性模量E=206Gpa,泊松比&nu;=0.3。</p> <p style="margin: 0px; padding: 0px 12px; outline: 0px; text-indent: 2em;"> (10)抗剪强度275~392MPa,抗拉强度为353~500MPa,屈服强度为275MPa,延伸率为25%。</p> </div> <p> &nbsp;</p>