我是学电焊的,为什么506焊条,说明书说要先烤,为什么,
推荐回答(2个)
J506焊条药皮为低氢钾型,药皮配方是在J507配方基础上添加了适量的稳弧剂,采用先进的工艺制造而成。
J506焊条也是普通结构钢焊条.与它同级的还有J507焊条.
其表示:
J--结构钢焊条.
50--焊缝强度等级50公斤/平方毫米.
6--交直流两用低氢型.
7--直流低氢型.
你所指的普通焊条是另一种结构钢焊条J422焊条.
它是焊缝强度等级为42公斤级的结构钢焊条.
其末位2表示钛钙型(氧化钛钙型)交直流两用.
两者由于强度等级不同用途也不同.
J422主要用于焊接较重要低碳钢结构和同等强度的普低钢.
J506主要用于焊接重要低碳钢结构,中碳钢及某些普低钢如16锰等.
J422药皮为钛钙型,焊渣为长渣型,易去渣.
J506药皮为低氢型.焊渣为短渣型,不易去渣.
J506药皮易受潮,焊前需烘干.而J422一般可不进行烘干.
普低钢焊条的规格有:¢1.0,¢1.6,¢2.0,¢2.5,¢3.2,¢4.0,¢5.0,¢6.0(mm).常用的为¢2.5¢3.2¢4.0(mm).
该焊条具有焊缝成型美观、电弧稳定性好、飞溅小、脱渣容易、熔深适中等优点。尤其适用于全位置焊接。焊接电流为交流或直流反接,焊接时采用短弧操作。焊缝金属具有良好的抗裂性能。
主要焊接与焊条强度等级相当的碳钢、低合金钢、船舶用钢和压力容器,如16Mn、09Mn2Si等。
( 高铬铸铁耐磨焊条 ) 高铬铸铁耐磨焊条堆焊层硬度高,组织为粒状碳化物、马氏体和残余奥氏体,能有效地承受恶劣工况下高硬度磨料磨损和高应力接触疲劳磨损等,适用于电厂吸风机转子叶片、粉尘泵阀、泥浆泵叶轮、挖泥船等易磨损零件的硬化、强化和修复。 ( 高锰钢电焊条 ) 高锰钢焊条执行的是国家《GB984-85 堆焊焊条》标准,此焊条加工硬化性特别高,堆焊后硬度不高,为HB≥170,但经加工硬化后可达HB≥450-500。适用于严重冲击载荷和金属间磨损工作,如破碎机鄂板、锤头、铁轨道岔等高锰钢件的堆焊。 其中有钼提高了抗裂性及耐磨性能。要焊后趁红热立即锤击或水淬以减少裂纹。堆焊高锰钢件要先将磨损处疲劳层铲除。 (模具电焊条) 用于制造和修复冲模及各种大中型冲裁修边模的剪切刃口的模具堆焊和修复。(在碳钢基体上堆焊形成冲模刃口可代替整体模具钢)。 (钼及铬钼耐热钢焊条) 耐热钢在高温下具有化学稳定性和足够的强度,并有抗气体侵蚀的能力。按化学成分和显微组织,耐热钢可分为珠光体钢、马氏体钢、铁素钢和奥氏体钢。珠光体耐热钢和马氏体耐热钢在电弧焊时,要求选用的不同型号的电焊条。一般可按不同的钢种和不同工作温度分别选用。 (不锈钢焊条) 不锈钢焊条具有良好的耐蚀性和抗氧化性,广泛应用于化工、石油、化肥、食品机械、医疗器械等设备的制造。一般焊条选用应与母材成分相同或相近,主要按介质和工作条件、温度来选择焊条。 (球墨铸铁焊条) 用于堆焊工作温度在350℃以下的中温中压球墨铸铁阀门密封面。 (铸造碳化钨气焊条) 铸造碳化钨气焊条管内成分为W2C和WC合金颗粒,硬度93HRA熔点1600-1800度,采用氧-乙炔焰堆焊,具有较高的耐磨性.适用于石油钻具,混凝土搅拌叶片、挖泥机叶片、高速混砂箱、木炭机、打井钻头、秸杆还田粉碎机和饲料粉碎机刀片等易磨损件的堆焊。
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