jbt 4290-1999 高速工具钢锻件 技术条件

ICS25.020J32JB/T4290－1999高速工具钢锻件技术条件Technicalrequirmentsforforgingsofhigh–speedsteel1999-06-24发布2000-01-01实施国家机械工业局发布I前言1范围····················································································································································································································12引用标准·········································································································································································································13技术要素·········································································································································································································14标志及质量证明文件···············································································································································································5附录A（标准的附录）钨系高速工具钢锻件碳化物均匀度评级图··············································································6附录B（标准的附录）钨系高速工具钢锻件带状碳化物均匀度评级图····································································8附录C（标准的附录）钨系高速工具钢锻件弯曲状碳化物均匀度评级图·······························································9附录D（标准的附录）钨钼系高速工具钢锻件碳化物均匀度评级图·······································································10附录E（标准的附录）钨钼系高速工具钢锻件带状碳化物均匀度评级图·····························································12附录F（标准的附录）钨钼系高速工具钢锻件弯曲状碳化物均匀度评级图························································13JB/T4290－1999目次II前言本标准是对JB4290—86《高速工具钢锻件技术条件》的修订。本标准与JB4290—86相比，主要技术内容改变如下：1）按有关规定在格式上重新作了编排。2）按JB/T8421—1996《钢质自由锻件检验通用规则》的规定增加了标志及质量证明文件，以及对重要锻件按需要增加超声波探伤内容。3）钢号中注明了所属系列（钨系或钨钼系），以便于选用碳化物均匀度评级图。4）按相关标准修改了技术术语和文字表达。本标准自实施之日起代替JB4290—86。本标准的附录A、附录B、附录C、附录D、附录E、附录F都是标准的附录。本标准由全国锻压标准化技术委员会提出并归口。本标准起草单位：上海工具厂有限公司。本标准主要起草人：刘康全、金颖、袁家栋、宋永祚。JB/T4290－199911范围本标准规定了高速工具钢锻件的技术条件、检验方法、检查规则、标志及质量证明文件。本标准适用于经镦拔或反复镦拔的高速工具钢刀具锻件。对本标准规定以外的新型高速工具钢刀具锻件也可参照使用。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/T224—1987钢的脱碳层深度测定法GB/T230—1991金属洛氏硬度试验方法GB/T231—1984金属布氏硬度试验方法GB/T1814—1979钢材断口检验法JB/T4009—1999接触式超声纵波直射探伤方法JB/T8421—1996钢质自由锻件检验通用规则3技术要素3.1技术要求3.1.1锻件的形状和尺寸应符合锻件图样及工艺文件的要求。3.1.2锻件表面存在的局部凹坑、折叠、发裂、裂纹等缺陷，其深度不得超过单边加工余量实际值的1/2。3.1.3锻件应经退火处理，退火后硬度应符合表1的规定。表1高速工具钢锻件退火硬度序号钢号（系列）硬度（HBS）序号钢号（系列）硬度（HBS）1W18Cr4V（钨系）≤2558CW6Mo5Cr4V3（钨钼系）≤2552W18Cr4VCo5（钨系）≤2699W2Mo9Cr4V2（钨钼系）≤2553W18Cr4V2Co8（钨系）≤28510W6Mo5Cr4V2Co5（钨钼系）≤2694W12Cr4V5Co5（钨系）≤27711W7Mo4Cr4V2Co5（钨钼系）≤2695W6Mo5Cr4V2（钨钼系）≤25512W2Mo9Cr4VCo8（钨钼系）≤2696CW6Mo5Cr4V2（钨钼系）≤25513W9Mo3Cr4V（钨钼系）≤2557W6Mo5Cr4V3（钨钼系）≤25514W6Mo5Cr4V2A1（钨钼系）≤269国家机械工业局1999-06-24批准中华人民共和国机械行业标准高速工具钢锻件技术条件Technicalrequirmentsforforgingsofhigh–speedsteelJB/T4290－1999代替JB4290—862000-01-01实施JB/T4290－199923.1.4锻件退火后脱碳层深度不得超过单边加工余量实际值的1/2。表面缺陷和脱碳层叠加后的总深度不得超过单边加工余量实际值的2/3。3.1.5锻件断口必须均匀细密，不得有裂纹和荼状断口等缺陷。3.1.6锻件的碳化物均匀度合格级别应符合表2的规定。表2锻件碳化物均匀度合格级别刀具名称刀具直径Dmm碳化物均匀度合格级别＜100≤3直齿插齿刀≥100~160≤4≤100≤4齿轮滚刀、剃前齿轮滚刀、渐开线花键滚刀＞100~125≤5盘形剃齿刀≤240≤4注1带状和弯曲状碳化物均匀度评级合格级别与碳化物均匀度合格级别相同。2≤240mm系指公称分度圆直径。3.2检验方法3.2.1锻件的形状与尺寸用样板、游标卡尺和钢尺配合卡钳等测量工具检查。3.2.2锻件的表面质量用肉眼检查。3.2.3硬度检验应符合GB/T231或GB/T230的规定。3.2.4脱碳层检验应符合GB/T224的规定。3.2.5断口检验应符合GB/T1814的规定。3.2.6锻件内部裂纹等缺陷的超声波检验应符合JB/T4009的规定。3.2.7碳化物均匀度检验3.2.7.1试样的切取a）圆柱形锻件：在锻件高度H的中间切取厚度大于10mm一片，然后沿直径方向切取试样两块，试样边长A应大于或等于检查部位尺寸K（见图1）；b）圆盘形锻件：沿锻件直径方向切取试样两块，试样边长A应大于或等于检查部位尺寸K（见图2）；c）矩形截面锻件：在锻件长度L的中间，切取厚度大于10mm一片，然后沿纵向切取试样一块，试样高度等于检查部位尺寸K（见图3）。检查部位尺寸K按刀具的刃口部分尺寸加5mm计算。对矩形截面锻件，当尺寸K的计算值大于矩形长边B的1/2时，K值取B的1/2。齿轮滚刀、剃前齿轮滚刀、直齿插齿刀、盘形剃齿刀、渐开线花键滚刀的检查部位尺寸K按表3的规定。JB/T4290－19993图1圆柱形锻件试样切取示意图图2圆盘形锻件试样切取示意图图3矩形截面锻件试样切取示意图表3锻件检查部位尺寸K的规定mm检查部位尺寸K模数m齿轮滚刀剃前齿轮滚刀直齿插齿刀盘形剃齿刀渐开线花键滚刀0.5————60.75————6.517.57.57.57.56.51.25888871.59998.57.51.759.59.59.59.582101010108JB/T4290－19994表3（完）mm检查部位尺寸K模数m齿轮滚刀剃前齿轮滚刀直齿插齿刀盘形剃齿刀渐开线花键滚刀2.2510.510.510.510.5—2.511111111.592.7512121212—312.512.512.513103.2513131313.5—3.513.513.513.51410.53.7514.514.514.515—415151515.511.54.5161616.516.5—517.517.517.517.5135.518.518.51918.5—6202020.519.5156.5212121.520.5—722.522.522.522—82525252418927.5—27.5——1030—30—21.511——32.5——12——35——3.2.7.2试样按表4所规定的温度淬火，并在680~700℃回火1h。表4试样淬火温度的规定钢号淬火温度℃钢号淬火温度℃W18Cr4V1270~1285CW6Mo5Cr4V31190~1210W18Cr4VCo51270~1290W2Mo9Cr4V21190~1210W18Cr4V2Co81270~1290W6Mo5Cr4V2Co51190~1210W12Cr4V5Co51220~1240W7Mo4Cr4V2Co51180~1200W6Mo5Cr4V21210~1230W2Mo9Cr4VCo81170~1190CW6Mo5Cr4V21190~1210W9Mo3Cr4V1210~1230W6Mo5Cr4V31190~1210W6Mo5Cr4V2A11230~12403.2.7.3碳化物均匀度的检查部位a）圆柱形和圆盘形锻件，在锻件外圆至深度为“K”的纵截面上检查（见图1、图2）；b）矩形截面锻件，在距矩形短边“C”尺寸为“K”的纵截面上检查（见图3）。JB/T4290－199953.2.7.4锻件碳化物均匀度评级按附录A（标准的附录）或附录B（标准的附录）或附录C（标准的附录）或附录D（标准的附录）或附录E（标准的附录）或附录F（标准的附录）的图片对照评定。钢号所对应的系列见表1。3.2.7.5碳化物均匀度级别的评定，以检查部位内三个严重视野的算术平均值作为评级依据，允许有0.5级的误差。3.3检查规则3.3.1锻件的外形尺寸和表面质量应逐件检查。3.3.2退火硬度每一退火炉次抽查不少于4件，试样应在退火炉膛的不同部位抽取。3.3.3脱碳层每一退火炉次抽查2件，若工艺能保证质量，允许免检。3.3.4断口每批抽验1件，若工艺能保证质量，允许免检。3.3.5重要锻件超声波探伤按需要逐件检查，其验收条件由供需双方商定。3.3.6碳化物均匀度的检查数量按表5规定。表5碳化物均匀度抽查数量批量（件）抽查数＜30累计30~100件抽查1件30~1001件101~2002件＞200抽查1%，但昀多不超过4件3.3.7检查项目若不合格，允许加倍抽样复查，复查仍不合格，作不合格处置。4标志及质量证明文件4.1标志