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J33JB/T56101-1999铸铁焊条产品质量分等(内部使用)1999-12-30发布2000-06-01实施国家机械工业局发布I前言1范围····················································································································································································································12引用标准·········································································································································································································13技术要求·········································································································································································································14抽样····················································································································································································································25试验方法·········································································································································································································36检验规则·········································································································································································································8JB/T56101-1999目次II前言本标准是根据GB/T10044—1988《铸铁焊条及焊丝》,对JB/T56101—94《铸铁焊条产品质量分等》的修订。修订时,对原标准作了编辑性修改,主要技术内容没有变化。本标准自实施之日起代替JB/T56101—94。本标准由全国焊接标准化技术委员会提出并归口。本标准起草单位:哈尔滨焊接研究所、天津市金桥焊材有限公司。本标准起草人:储继君、陈默、吴振祥、侯永泰。本标准于1980年首次发布,1985年第一次修订,1988年第二次修订,本次是第三次修订。JB/T56101-199911范围本标准规定了铸铁焊条产品质量等级的技术要求、抽样、试验方法及检验规则等内容。本标准适用于铸铁焊条的产品质量分等。2引用标准下列标准所包含的条文,通过在本标准中引用而构成为本标准的条文。本标准出版时,所示版本均为有效。所有标准都会被修订,使用本标准的各方应探讨使用下列标准昀新版本的可能性。GB/T10044—1988铸铁焊条及焊丝3技术要求铸铁焊条的产品质量分为合格品、一等品和优等品三个等级,按其外在质量、内在质量和工艺性能三个方面进行考核。3.1外在质量外在质量应符合表1的规定。表1外在质量检验项目合格品一等品优等品外在质量(分数)≥60.0≥80.0≥87.0平均根次合格率%≥85.0≥95.0≥97.0偏心度(分数)≥4.0≥10.0≥18.0焊条夹持端—夹持端整齐、美观,露芯部位无明显锈迹3.2内在质量熔敷金属化学成分应符合表2的规定。国家机械工业局1999-12-30批准中华人民共和国机械行业标准铸铁焊条产品质量分等(内部使用)JB/T56101-1999代替JB/T56101—942000-06-01实施JB/T56101-19992表2熔敷金属化学成分%CSiMnSPFeNiCuAlV球化剂其它元素总量铸铁焊条型号合格品、一等品、优等品EZC2.00~4.002.5~6.5≤0.75––EZCQ3.20~4.203.20~4.00≤0.80≤0.10≤0.15余量–0.04~0.15EZNi–1≤2.50≥90––EZNi–2≤4.00≤1.00≤8≥85≤2.50≤1.00EZNiFe–1≤2.50≤1.80––EZNiFe–2≤1.00EZNiFe–3≤2.00≤4.00≤1.00≤0.03余量45~60≤2.501.00~3.00EZNiCu–1≤1.00≤0.80≤2.50≤660~7024~35EZNiCu–20.35~0.55≤0.75≤2.30≤0.0253~650~6035~45EZNiFeCu≤2.00≤2.00≤1.50≤0.03–45~604~10≤1.00EZFe–1≤0.04≤0.10≤1.00EZFe–2≤0.15≤0.03≤0.60–EZV≤0.25≤0.70≤1.50≤0.04≤0.04余量–––8~13––3.3工艺性能3.3.1焊接工艺性能合格品、一等品和优等品焊条均应引弧容易,在焊接过程中电弧燃烧稳定,不应有过大飞溅。药皮熔化应均匀,无成块脱落现象,并容易清渣。3.3.2再引弧再引弧性能应符合表3的规定。表3再引弧性能s再引弧间隔时间药皮类型合格品一等品优等品石墨型≥6≥10其它型—≥2≥34抽样4.1抽样数量如焊条偏心度采用非破坏性方法检验时,应从每批焊条中抽样110根,其中各取5根分别做耐潮性及药皮强度试验,另外100根首先用于检验外在质量的其它项目,然后用于检验内在质量和工艺性能。JB/T56101-19993如焊条偏心度采用破坏性方法检验时,应从每批焊条中抽样110根,其中各取5根分别做耐潮性及药皮强度试验,另外100根首先用于检验除偏心度以外的其它外在质量项目,然后在其中随机抽取20根用于检验偏心度,剩余焊条用于检验内在质量和工艺性能。如果用于检验外在质量的焊条需要保留时,抽样时应增加内在质量、工艺性能或偏心度检验所需焊条的数量。当检验不合格需要复验时,应按上述方法加倍抽样。4.2抽样方法每批焊条抽样时,按照需要数量至少在三个部位平均取有代表性的样品。5试验方法5.1外在质量焊条外在质量18个项目的分数及检验数量见表4。表4外在质量分数及检验数量检验项目分数检验根数偏心度25.0100或20耐潮性药皮强度5焊条直径焊条长度夹持端长度弯曲度杂质损伤裂纹包头破头倒角磨尾不净5.0毛条竹节3.0发泡、皱皮印字2.01005.1.1偏心度每根检验焊条测定任意一处,测量点不宜选择在有影响焊条偏心测量的缺陷部位。有磁性焊条采用非破坏性方法检验,检测100根。无磁性焊条可采用非破坏性方法检验,检测100根,也可采用破坏性方法检验,检测20根。JB/T56101-199945.1.2耐潮性将焊条静置于水中,1h后观察,药皮不应有胀开或剥落现象。5.1.3药皮强度将焊条横置,自由落到厚度不小于14mm水平放置的光滑、平整的钢板上,焊条落下高度规定见表5。只允许受检焊条两端的药皮有破裂,破裂总长度不大于30mm。表5焊条落下高度mm焊条直径落下高度<4.07004.0,5.0500≥6.03005.1.4焊条直径焊条直径应符合表6的规定。5.1.5焊条长度焊条长度应符合表6的规定。表6焊条直径和焊条长度mm焊条直径焊条长度类型基本尺寸极限偏差基本尺寸极限偏差4350~400568铸造焊芯10±0.3350~500±42.5200~3003.245300~450冷拔焊芯6±0.05400~500±2注1允许制造直径φ3.0mm焊条代替φ3.2mm焊条,直径φ5.8mm焊条代替φ6.0mm焊条。2根据需方要求,允许通过协议供应其它尺寸的焊条。5.1.6夹持端长度焊条夹持端长度应符合表7的规定。JB/T56101-19995表7夹持端长度mm夹持端长度极限偏差焊条直径基本尺寸冷拔焊芯铸造焊芯2.515>2.5~6.020>6.025±5±85.1.7弯曲度焊条弯曲昀大挠度:冷拔焊芯的不得超过1mm,铸造焊芯的不得超过1.5mm。5.1.8杂质药皮表面不允许有杂质存在。药皮表面上的木屑、竹片、细钢丝、过大的涂料颗粒(超过企业原材料标准)或有明显不同颜色的颗粒等均视为杂质。5.1.9损伤凡属下列情况之一者,判为该项次不合格:a)擦伤宽度和长度大于或等于焊芯直径;b)擦伤宽度大于1mm,总长度大于或等于40mm;c)擦伤宽度大于1mm,一处长度大于或等于30mm;d)擦伤宽度大于1mm,长度大于或等于2mm,深度大于或等于1/2药皮厚度;e)擦伤宽度小于或等于1mm,总长度大于或等于200mm;f)凹坑尺寸大于2mm,超过一处;凹坑尺寸小于或等于2mm,超过两处;g)除磨头、磨尾部分外,药皮表面露芯者;h)焊条压痕按擦伤处理。5.1.10裂纹凡属下列情况之一者,判为该项次不合格:a)纵向裂纹:总长度大于20mm;b)横向裂纹:超过焊条半圆周;c)龟裂纹:总长度大于20mm。5.1.11包头焊条引弧端药皮包住焊芯截面一半以上判为该项次不合格。5.1.12破头凡属下列情况之一者,判为该项次不合格:a)焊条破头超过半圆周,破头长度大于表8的规定者;JB/T56101-19996表8焊条破头长度mm焊条直径焊条破头长度2.51.53.2,4.02.05.0,6.02.5>6.03.0b)焊条破头小于半圆周,破头长度大于表9的规定者;表9焊条破头长度mm焊条直径焊条破头长度2.52.03.2,4.03.05.0,6.03.5>6.04.0c)各种直径焊条沿圆周方向的露芯大于圆周的一半;d)各种直径焊条沿长度方向的露芯长度大于焊条直径的三分之二。5.1.13倒角无倒角痕迹为该项次不合格。如有争议,以焊芯与药皮外径在同一端面(似未经削剥的铅笔)或超过焊芯端面位置判为该项次不合格。5.1.14磨尾不净直径不大于4.0mm的焊条夹持端8mm之内,直径大于4.0mm的焊条夹持端12mm之内,不允许有明显药粉色存在。5.1.15毛条药皮表面不允许有毛条存在,在室内光线较充足位置观察判别。如有争议,可在灯光下三人观察,以多数人的判别为准。5.1.16竹节药皮表面不允许有竹节存在,在室内光线较充足位置观察判别。如有争议,可在灯光下三人观察,以多数人的判别为准。5.1.17发泡、皱皮药皮表面不允许有发泡、皱皮存在,在室内光线较充足位置观察判别。如有争议,可在灯光下三人观察,以多数人的判别为准。5.1.18印字在靠近焊条夹持端的药皮上至少印有一个焊条型号或牌号,字型应采用醒目的印刷体。字体颜色与焊条药皮之间应有较强的反差,以便在正常的焊接操作前后都清晰可辨。以有无印字为准,不计根数。JB/T56101-199975.1.19评分方法及平均根次合格率评分方法如下:a)焊条偏心度评分方法见表10。表10焊条偏心度评分方法类别焊条直径mm偏心度%得分全部≤525.0分2.5>5~7每根扣1
本文标题:JBT 56101-1999 铸铁焊条 产品质量分等
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