CN1517450A - 具有硬质合金涂层的嵌入件 - Google Patents
具有硬质合金涂层的嵌入件 Download PDFInfo
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- 238000000576 coating method Methods 0.000 title claims abstract description 49
- 239000011248 coating agent Substances 0.000 title claims abstract description 47
- 229910052751 metal Inorganic materials 0.000 title claims description 5
- 239000002184 metal Substances 0.000 title claims description 5
- 230000037431 insertion Effects 0.000 title 1
- 238000003780 insertion Methods 0.000 title 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 35
- 238000007514 turning Methods 0.000 claims abstract description 20
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 4
- 239000010959 steel Substances 0.000 claims abstract description 4
- 239000000758 substrate Substances 0.000 claims description 18
- 239000013078 crystal Substances 0.000 claims description 15
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 230000000737 periodic effect Effects 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 abstract description 24
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 7
- 238000011282 treatment Methods 0.000 abstract description 4
- 229910052593 corundum Inorganic materials 0.000 abstract description 3
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract description 3
- 239000010936 titanium Substances 0.000 description 17
- 238000012360 testing method Methods 0.000 description 15
- 239000000463 material Substances 0.000 description 14
- 229910052757 nitrogen Inorganic materials 0.000 description 10
- 229910052799 carbon Inorganic materials 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 8
- 239000004677 Nylon Substances 0.000 description 7
- 229920001778 nylon Polymers 0.000 description 7
- 238000005229 chemical vapour deposition Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 229910001220 stainless steel Inorganic materials 0.000 description 5
- 239000010935 stainless steel Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 244000025254 Cannabis sativa Species 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 229910018514 Al—O—N Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910009043 WC-Co Inorganic materials 0.000 description 1
- FGUJWQZQKHUJMW-UHFFFAOYSA-N [AlH3].[B] Chemical compound [AlH3].[B] FGUJWQZQKHUJMW-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
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- 238000013461 design Methods 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 229910001039 duplex stainless steel Inorganic materials 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
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Abstract
本发明涉及一种刀具嵌入件,特别用于车削钢材,包括硬质合金体、经过后处理的涂层,具有首先,一层或几层TiCxNyOz的最里层***,其中x+y+z≤1,总厚度为0.7-4.5μm,第二,由总共5-31层交替的Al2O3和TiCxNyOz(x+y+z≤1)层、并优选是κ-Al2O3和TiN层构成的多层***,Al2O3层其单独的层厚<0.5μm,TiCxNyOz-层其单独的层厚为0.01-0.2μm,该多层的总厚度为1.0-4.0μm。该多层沿着刀刃线暴露,并进入前刀面和后刀面,从前刀面上的刀刃线至少为0.03mm,优选切屑的接触长度最多为0.9mm,在后刀面上为0.02-0.20mm。
Description
技术领域
本发明涉及一种具有硬质合金涂层的刀具嵌入件,它用于对刀刃的耐磨性和韧性性能有很高要求的普通钢用途中的机加工。该刀具尤其适用于对不锈钢进行车削。
背景技术
当在对钢进行机加工中使用硬质合金刀具时,该刀具会由于不同机理例如磨蚀和化学侵蚀、刀刃的剥落和断裂而磨损。不锈钢的切削被认为是一种特别困难的机加工操作,因为除了上述磨损机理之外,粘附磨损也是非常突出的。在切削操作过程中,当污损材料例如不锈钢连续地粘附在刀刃上和从刀刃上撕去材料时就产生了粘附磨损。因此当加工不锈钢时工具的寿命通常是很短的。另外,当以高的切削速度切削不锈钢时,传递给刀刃的热能非常大,因此刀具的刀刃可能会部分或者完全塑性变形。刀刃的这种损坏模式被称之为塑性变形磨损。对耐塑性变形性能的极高要求与对刀刃韧性的极高要求形成鲜明对比。
已知有这样的多层涂层,它包括交替层压在基底上的由不同材料形成的第一和第二涂层,每层第一涂层具有第一厚度且每层第二涂层具有第二厚度。这两种层优选应该具有不同的晶体结构和/或至少不同的晶格间距。这种技术的一个实施例为通过短暂的TiN沉积工艺来周期性地中断Al2O3生长,从而得到(Al2O3+TiN)x多层结构,参见例如第12届欧洲CVD会议论文集第8-349页。GB2048960A披露了一种具有由不同组分的硬质材料构成的厚度为0.02至0.1μm的多个交替层的多层涂层。US4599281披露了一种具有交替的铝-硼混合氧化物层和例如Ti(C,N,O)的另一层氧化物层的多层涂层。Dreyer和Kolaska在MetalSociety(Book278),London,England(1982)112-117上报道了一种Al-O-N多层。在US4984940中,Bryant等人披露了一种由具有6.1-6.5wt%钴的硬质合金基底、包括碳氮化钛底层的涂层然后是由多层氧化铝构成的多层涂层构成的切削嵌入件。在US5700569中也要求保护了一种具有包括6-8层氧化铝层的涂层的硬质合金基底。WO99/58738披露了一种由硬质耐磨基底和大约为50层的CVD多层构成的刀具。EP-A-1103635要求保护了一种刀具,它由具有9.0-10.9wt%钴的硬质合金基底和包括中温CVD(MTCVD)沉积TiCN层以及由总共7-41层α-氧化铝和TiN或Ti(C,N)构成的多层的涂层构成。EP-A-1245698、EP-A-1245700和EP-A-1209255也涉及多层涂层。
在EP-A-127416、EP-A-298729、EP-A-693574和EP-A-683244披露了通过机械后处理来磨光这些涂层以例如减小刀具和工件之间的摩擦。
发明内容
本发明的一个目的在于提供一种能够同时承受所有上述磨损模式的刀具嵌入件。
本发明还有一个目的在于消除现有技术刀具产品的缺陷并且提供一种高性能刀具。
本发明再一个目的在于提供一种在不锈钢车削操作中具有优良切削性能的刀具。
令人惊讶地发现,具有包括由多层交替的Al2O3和TiCxNYOz层构成的经机械后处理的多层的涂层的硬质合金切削嵌入件可以满足这些要求。该嵌入件尤其在间歇切削期间具有优异的韧性,并且对于粘附磨损和塑性变形具有良好的忍受力。
附图说明
图1为本发明涂层的横断面的扫描电子显微照片(SEM),其中:
A.TiN
B.柱状Ti(C,N)
C.TiN
D.多层(Al2O3+TiN)6Al2O3以及
E.TiN+TiC+TiN;
图2.1为没有经过后处理的刀刃的横断面的示意图;
图2.2为根据本发明经过后处理的刀刃的横断面的示意图,其中除去了最外面涂层E;
图2.3为根据本发明经过后处理的刀刃的横断面的示意图,其中除去了最外面涂层E和多层(Al2O3+TiN)xAl2O3;
图3为根据现有技术经过后处理的刀刃的横断面的示意图;
图4为根据本发明经过后处理的刀刃的SEM照片;
图5为其各个氧化铝层更厚的参考刀具的经过后处理的刀刃的SEM照片(嵌入件D)。
具体实施方式
更具体地说,本发明涉及一种基于WC+Co的硬质合金基底,它添加有立方碳化物、特定晶粒尺寸范围内的WC晶粒、具有特定组分范围的WC+Co以及位于硬质合金基底上的涂层,该涂层包括等轴TiCxNyOz的最里面薄层、之后为柱状TiCxNyOz层、等轴TiCxNyOz薄层、具有周期性变化的TiCxNyOz和Al2O3层(x+y+z≤1)的多层和TiCxNy(x+y≤1)的最外面层。至少在与围绕着刀刃离开工件的材料直接接触的区域中没有非氧化物最外层。
该硬质合金基底的组分应该为7-10.5wt%优选为8.0-9.5wt%的Co和0.2-1.6wt%优选为0.4-1.0wt%的金属Ta、Nb和Ti的立方碳化物或者其它来自元素周期表的族IVb、Vb或VIb中的元素的碳化物以及平衡量的碳化钨(WC)。WC其平均晶粒大小优选为1.5-3.5μm、更优选为1.9-2.1μm。
在可选实施方案中,硬质合金基底在表面附近具有耗尽了立方碳化物并且富集有粘合剂的空间。从该表面直到立方碳化物耗尽部分的尽头所测量出的距离应该为5-50μm。在该实施方案中,该组成包括7.0-10.5wt%Co和4.0-9.0wt%立方碳化物以及平衡量碳化钨(WC)。所述立方碳化物可以包括相当多的N和O,从而微观结构成分应该称为例如氮化碳或氧代氮化碳(oxycarbonitride)。立方碳化物优选为Nb、Ta和Ti、但是可以包括来自元素周期表的族IVb、Vb或Vib中的元素的碳化物。N的量应该为0.01-0.2wt%。
在第一实施方案中,根据本发明沉积在硬质合金基底上的硬质耐磨耐火涂层(图1)包括:
最里面的第一TiCxNyOz层(A),其中x+y+z≤1,优选y>x并且z<0.2,最优选为y>0.8且z=0,而且等轴晶粒其尺寸<0.5μm并且总厚度<1.5μm但是>0.1μm优选为0.1-0.6μm。
第二TiCxNyOz层(B),其中x+y+z≤1,优选z=0、x>0.3并且y>0.3,最优选为x>0.5,而且柱状晶粒其厚度为0.4-3.9μm优选为1.5-3.0μm。
在第一实施方案中的第三TiCxNyOz层(C),其中x+y+z≤1,优选y>x并且z<0.2,最优选为y>0.8且z=0,而且等轴晶粒其尺寸<0.5μm并且总厚度<1.5μm但是>0.1μm,优选为0.2-0.8μm,该层(C)在第二实施方案中被去掉。
这些层A+B+C的总厚度为0.7-4.5μm,优选为1.2-4.0μm。更优选的是,层A和C每个都比层B薄。
由多个交替的Al2O3和TiCxNyOz(x+y+z≤1)层且优选为к-Al2O3和TiN层构成的多层(D)。多层中的最里面层和最外层是Al2O3层。包括TiCxNyOz-和Al2O3层在内的这些层的总数为5-31,优选为11-15层。Al2O3层其单独的层厚<0.5μm,优选为0.2-0.5μm。TiCxNyOz-层其单独的层厚为0.01-0.2μm,优选为0.02-0.15μm。该多层的总厚度为1.0-4.0μm,优选为1.5-3.5μm。Al2O3层的晶粒大小等于或小于Al2O3层的厚度。
由以TiCxNy(x+y≤1)或其结合的顺序的一层或多层构成的最外层***(E),优选为以TiN、TiC和TiN的顺序的三层。其总厚度为<2.0μm但是>0.1μm,优选为0.2μm-1.0μm。
这些层A-E的总厚度为2.0-8.0μm,优选为4.0-7.0μm。
在刀刃周围没有该涂层的最外部分,从而该区域对应于在前刀面上的切屑接触位置以及在后刀面上与工件的接触位置。最优选的是,当在近处的几何结构上存在主刀棱面时,该未涂覆区域对应于在前刀面上的主刀棱面,从而缺失涂层的长度按照从图2.2中限定的点以透视垂直的方式通到嵌入件面的平面计算,在前刀面上是“a”,在后刀面上是“b”,也就是前刀面上的暴露是“a”,在后刀面上的暴露是“b”。这些长度取决于不同的嵌入件的几何结构和嵌入件尺寸等,但是不管是否存在主刀棱面,在前刀面上,优选对应于0.03mm<a<0.9mm,0.02mm<b<0.2mm,并且a>b,优选a>1.5b。在一个实施方案中,没有E层。在另一个实施方案中在该区域的那些部分中没有D层和E层。
在刀刃线处除去最外层(E)会将Al2O3层沿着刀刃线暴露。该刀刃线被定义为刀具嵌入件的刀刃被磨刀石磨过的部分。图2.1中显示了未经过处理的刀刃线,图2.2和图2.3中显示了经过后处理的刀刃线。优选的是,只有非氧化物顶层和部分多层被除去。但是在刀刃线的较少部分处(图2.3),可以看见TiCxNyOz层(A+B+C)。
本发明还涉及一种制造上述涂布的刀具嵌入件的方法,该刀具嵌入件优选包括基于WC-Co的硬质合金体,它包括少于1.6wt%的立方碳化物,WC+Co的组成为7-10.5wt%且优选为8.0-9.5wt%的Co和0.2-1.6wt%的立方碳化物以及平衡量的碳化钨(WC)。WC其平均晶粒大小为1.5-3.5μm。该硬质合金体主要是通过如下方法制造,即粉末混合、球磨机研磨、喷雾干燥、某些压缩方法、然后是采用传统方法的烧结,并在涂布之前进行预处理。
在另一个实施方案中,该硬质合金基底的制造方法通过在加入少量氮之后在真空中烧结,而获得表面附近的耗尽立方碳化物但是富集了粘合剂相的空间。从表面直至立方碳化物耗尽部分的尽头所测量的距离应当为5-50μm。在该实施方案中,组成包括7-10.5wt%的Co和4.0-9.0wt%的立方碳化物以及平衡量的碳化钨(WC)。所述立方碳化物含有大量的N和O,从而某些微结构成分应当被称之为例如氮化碳或氧代氮化碳。该立方碳化物优选是Nb、Ta和Ti、但是可以包括来自元素周期表的族IVb、Vb或VIb中的元素的碳化物。基底中N的量应该为0.01-0.2wt%。
然后该硬质合金体涂布有:
(最里面的)第一TiCxNyOz层(A),其中x+y+z≤1,优选y>x并且z<0.2,最优选为y>0.8且z=0,而且等轴晶粒其尺寸<0.5μm并且总厚度<1.5μm但是>0.1μm,采用已知的化学气相沉积CVD方法形成;
TiCxNyOz层(B),其中x+y+z≤1,优选z=0、x>0.3并且y>0.3,而且柱状晶粒其厚度为0.4-3.9μm优选为1.5-3.0μm,优选采用中等温度的CVD、MTCVD技术(采用乙腈作为碳源和氮源,用于在700-900℃的温度范围内形成层)。确切的条件依赖于所采用的设备的设计程度,但是在本领域技术人员的已知范围内;
TiCxNyOz层(C),其中x+y+z≤1,优选y>x并且z<0.2,最优选为y>0.8且z=0,而且等轴晶粒其尺寸<0.5μm并且总厚度<1.5μm但是>0.1μm,采用已知的CVD方法来形成。该层(C)在第二实施方案中被去掉;
这些层A+B+C的总厚度为0.7-4.5μm,优选为1.2-4.0μm。更优选的是,层A和C每个都比层B薄。
多层(D),由多个交替的Al2O3和TiCxNyOz(x+y+z≤1)层且优选为к-Al2O3和TiN层采用已知的CVD方法构成。该多层序列的最里层和最外层是Al2O3层。包括TiCxNyOz-和Al2O3层在内的这些层的总数为5-31,优选为11-15层。Al2O3层其单独的层厚<0.5μm,优选为0.2-0.5μm。TiCxNyOz-层其单独的层厚为0.01-0.2μm,优选为0.02-0.15μm。该多层的总厚度为1.0-4.0μm,优选为1.5-3.5μm。Al2O3层的晶粒大小等于或小于Al2O3层的厚度。
优选的是,由按照TiCxNy(x+y≤1)或其结合的顺序的一层或多层采用已知的CVD方法构成的最外层***(E)。其总厚度为<1.5μm。
G.这些层A-E的总厚度为2.0-8.0μm。
对该涂层通过刷、喷砂、碾磨操作或其结合进行机械后处理以沿着刀刃线暴露该多层,从而前刀面和后刀面上分别与切屑和工件接触的区域得到处理。
在优选的方法中,设有包含有SiC颗粒的两个尼龙刷子,并且将底座和嵌入件如此定位,从而一个刷子主要刷前刀面,而另一个刷子主要刷后刀面以在嵌入件的前刀面和后刀面上实现所要求的性能。
实施例
以下嵌入件和实施例选作用来解释本发明的优点。这些实施例总结在表1中。
在每个实施例中的嵌入件都采用同样的条件进行测试。
嵌入件A:本发明的硬质合金车削嵌入件其组成为:8.75wt%的Co,1.17wt%的Ta,0.29wt%的Nb以及平衡量的WC,平均WC晶粒尺寸为2.0μm,它涂布有0.5μm的TiN(最里层),2.2μm的柱状Ti(C,N),以及0.5μm的等轴的TiN,带有250nm厚的к-Al2O3层和80nm厚的TiN层的2.2μm的(к-Al2O3+TiN)6к-Al2O3多层以及0.5μm的TiN+TiC+TiN的最外层。该涂层沿着刀刃线用含有SiC晶粒的尼龙刷进行后处理。最外涂层在前刀面和后刀面除去a=0.1mm和b=0.05mm。
嵌入件B:商用硬质合金车削嵌入件具有:10.5wt%的Co,1.16wt%的Ta,0.28wt%的Nb以及平衡量的WC,平均晶粒尺寸为1.7μm,它涂布有最里层的0.5μm的等轴TiN层,4.0μm的柱状Ti(C,N),1.0μm的к-Al2O3层以及0.5μm的TiN+TiC+TiN的最外层。该涂层沿着刀刃线用含有SiC晶粒的尼龙草杆刷进行刷擦处理。最外涂层根据现有技术沿着刀刃线除去a=0.025mm和b=0.05mm。
嵌入件C:硬质合金车削嵌入件其组成为:9.15wt%的Co,1.17wt%的Ta,0.29wt%的Nb以及平衡量的WC,平均WC晶粒尺寸为1.7μm,它涂布有0.5μm的TiN(最里层),2.2μm的柱状TiCN,1.8μm的(к-Al2O3+TiN)5к-Al2O3多层以及0.5μm的TiN最外层。该涂层沿着刀刃线用含有SiC晶粒的尼龙刷进行后处理。最外涂层根据现有技术沿着刀刃线除去a=0.025mm和b=0.05mm。
嵌入件D:用与C同样的基底,它涂布有0.5μm的TiN(最里层),2.3μm的柱状Ti(C,N),1.9μm的(к-Al2O3+TiN)3к-Al2O3多层以及0.5μm的TiN最外层。该涂层沿着刀刃线用含有SiC晶粒的尼龙刷进行后处理。最外涂层根据现有技术沿着刀刃线除去a=0.025mm和b=0.05mm。
嵌入件E:用与C同样的基底,它涂布有最里层的0.5μm的等轴TiN层,2.2μm的柱状Ti(C,N),1.5μm的к-Al2O3以及0.5μm的TiN+TiC+TiN最外层。最外涂层根据现有技术沿着刀刃线除去a=0.025mm和b=0.05mm。
嵌入件F:硬质合金车削嵌入件具有:7.5wt%的Co,2.72wt%的Ta,0.44wt%的Nb,1.83wt%的Ti,0.09wt%的N以及平衡量的WC,平均晶粒尺寸为2.0μm,具有距离表面为26μm的富集了粘合剂相并且没有立方碳化物的区,它涂布有0.5μm的TiN(最里层),2.2μm的柱状Ti(C,N),以及0.5μm的等轴的TiN,2.2μm的(к-Al2O3+TiN)6к-Al2O3多层以及0.5μm的TiN+TiC+TiN的最外层。
该涂层沿着刀刃线用含有SiC晶粒的尼龙刷进行后处理。最外涂层在前刀面和后刀面除去a=0.1mm和b=0.05mm。
嵌入件G:商用的硬质合金车削嵌入件具有:7.5wt%的Co,2.72wt%的Ta,0.44wt%的Nb,1.83wt%的Ti,0.09wt%的N以及平衡量的WC,平均晶粒尺寸为2.0μm,具有距离表面为26μm的富集了粘合剂相并且没有立方碳化物的区,它涂布有最里层的0.5μm的等轴TiN层,7.5μm的柱状Ti(C,N),1.2μm的к-Al2O3层以及0.5μm的TiN+TiC+TiN的最外层。
该涂层沿着刀刃线用含有SiC晶粒的尼龙草杆刷进行刷擦。最外涂层如EP-A-693574所述沿着刀刃线除去a=0.025mm和b=0.05mm。
实施例1
在车削条件下测试嵌入件A和B。
操作: 对棒材进行轴向和端面车削
工件材料: 奥氏体不锈钢AISI316L
切削速度: 225m/分钟
进刀速度: 0.3mm/转
切削深度: 2.0mm
嵌入件型号:CNMG120408-MM
结果: 刀具寿命(分钟)
嵌入件A(本发明): ca10
嵌入件B(现有技术):ca6
说明:刀具寿命标准是切削刀刃线的最大后刀面磨损为0.3mm。由于局部的塑性变形,磨损不规律的发展。该实施例显示在耐塑性变形方面的改进。
实施例2
在车削条件下测试嵌入件A和B。
操作: 对装配件进行间歇切削
工件材料: 奥氏体不锈钢,AISI316L
切削速度: 160m/分钟
进刀速度: 0.2-0.3mm/转
切削深度: 0.5-1.5mm
嵌入件型号: SNMG120412-MR
结果: 刀具寿命(分钟)
嵌入件A(本发明): 8.2
嵌入件B(现有技术):4.2
说明:该测试中的磨损是后刀面磨损、热开裂、剥落。刀具寿命确定标准是剥落也就是刀刃韧性。因此它显示了改进的刀刃韧性以及在其它磨损模式中保留的性能。
实施例3
在车削条件下测试嵌入件A和B。
操作: 铸环的连续切削
工件材料: 奥氏体不锈钢,AISI316L
切削速度: 110m/分钟
进刀速度: 0.3mm/转
切削深度: 3.5mm
嵌入件型号: CNMG120412-MR
结果: 刀具寿命(分钟)
嵌入件A(本发明): 18.6
嵌入件B(现有技术):12.4
说明:该测试中的标准是用在切削6.2分钟的全部时间加工穿过整个物件而不会显示出过度的后刀面磨损或刀刃损坏。关键的磨损标准是后刀面磨损和塑性变形的结合。
本发明的嵌入件显示了在这些方面的改进。
实施例4
在车削条件下测试嵌入件A和B。
操作: 对壳体进行连续切削
工件材料: Duplex不锈钢,SS2377
切削速度: 110m/分钟
进刀速度: 0.3mm/转
切削深度: 1.35mm
嵌入件型号: WNMG080412-MR
结果: 刀具寿命(分钟)
嵌入件A(本发明): 46
嵌入件B(现有技术):24
说明:该测试显示了相对于现有技术的明显改进。但是在该实施例中难以确定一个单个的关键性磨损,但是可以描述为后刀面磨损、在前刀面上的掉皮(flaking)和刀刃韧性的结合。
实施例5
在车削条件下测试嵌入件A和B。
操作: 对铸件进行间歇切削
工件材料: 奥氏体不锈钢,AISI316
切削速度: 150-200m/分钟
进刀速度: 0.1-0.15mm/转
切削深度: 2.0mm
嵌入件型号: CNMG120412-PR
结果: 刀具寿命(分钟)
嵌入件A(本发明): 7
嵌入件B(现有技术):2
说明:该测试显示了在韧性上的改进,因为在这种需求应用中主磨损标准是刀刃韧性。
实施例6(说明性的)
在车削条件下测试嵌入件C和D。
操作: 对棒进行端面切削
工件材料: 奥氏体不锈钢,AISI304L
切削速度: 140m/分钟
进刀速度: 0.36mm/转
切削深度: 最大4mm
嵌入件型号: CNMG120408-MM
结果: 磨损模式
嵌入件C(对比例): 前刀面上有限的掉皮(图4)
嵌入件D(对比例): 前刀面上普遍掉皮(图5)
说明:该实施例显示了相对于对比例而言改进的耐掉皮性,暗示了氧化铝层厚度的重要性。
实施例7(说明性的)
在车削条件下测试嵌入件C和E。
操作: 端面切削和纵向车削的结合
工件材料: 奥氏体不锈钢,AISI316Ti
切削速度: 100-120m/分钟
进刀速度: 0.3mm/转
切削深度: 2.0mm
嵌入件型号: CNMG120408-MM
结果: 切削之外的总损坏刀刃
嵌入件C(对比例): 11.5mm
嵌入件E(现有技术):14.7mm
说明:主磨损是切削深度的切口磨损和在刀刃切割部分之外的剥落。
该实施例显示了相对于现有技术的涂层而言薄的多层涂层增加了刀刃韧性。
实施例8(说明性的)
在车削条件下测试嵌入件C和E。
操作: 端面切削和纵向车削的结合
工件材料: 奥氏体不锈钢,AISI304L
切削速度: 225m/分钟
进刀速度: 0.3mm/转
切削深度: 2.0mm
嵌入件型号: CNMG120408-MM
结果: 刀具寿命(分钟)
嵌入件C(对比例): 18
嵌入件E(现有技术):13
说明:刀具寿命标准是切削刀刃线的最大后刀面磨损为0.3mm。该磨损因为局部的塑性变形而不规律的发展。该实施例显示了在这种操作中相对于现有技术的涂层而言薄的多层涂层增加了对塑性变形的抵抗性。
就实施例7而言,该实施例显示了在这些相对立的性能方面的改进。
实施例9
在车削条件下测试嵌入件F和G。
操作: 对锻件进行连续切削
工件材料: 奥氏体不锈钢,AISI316L
切削速度: 200m/分钟
进刀速度: 0.3mm/转
切削深度: 2.0mm
嵌入件型号: CNMG120416-MM
结果: 刀具寿命(pcs)
嵌入件F(本发明): 32
嵌入件G(现有技术):19
说明:关键性的磨损标准是在该测试中结合的后刀面磨损和塑性变形。本发明的嵌入件显示了在这些方面的改进。
表1
A(本发明) | B(现有技术) | C(非本发明) | D(非本发明) | E(现有技术) | F(本发明) | G(现有技术) | |
基底 | |||||||
Co/Ta/Nb(wt%) | 8.75/1.17/0.29 | 10.5/1.16/0.28 | 9.15/1.17/0.29 | 9.15/1.17/0.29 | 9.15/1.17/0.29 | 7.5/2.72/0.44 | 7.5/2.72/0.44 |
Ti/N(wt%) | -/- | -/- | -/- | -/- | -/- | 1.83/0.09 | 1.83/0.09 |
涂层 | |||||||
TiN(最里层) | 0.5μm | 0.5μm | 0.5μm | 0.5μm | 0.5μm | 0.5μm | 0.5μm |
Ti(C,N) | 2.2μm | 4.0μm | 2.2μm | 2.3μm | 2.2μm | 2.2μm | 7.5μm |
TiN | 0.5μm | - | - | - | - | 0.5μm | - |
(Al2O3/TiN)xAl2O3或固体Al2O3 | 2.2μm,x=6 | 1.0μm固体Al2O3 | 1.8μm,x=5 | 1.9μm,x=3 | 1.5μm固体Al2O3 | 2.2μm,x=6 | 1.2μm固体Al2O3 |
TiN+TiC+TiN | 0.5μm | 0.5μm | 0.5μm | 0.5μm | 0.5μm | 0.5μm | 0.5μm |
后处理 | 根据本发明 | 现有技术 | 现有技术 | 现有技术 | 现有技术 | 根据本发明 | 现有技术 |
结果 | |||||||
1塑性变形(刀具寿命) | 10分钟 | 6分钟 | |||||
2结合磨损(刀具寿命) | 8.2分钟 | 4.2分钟 | |||||
3韧性和耐磨性(刀具寿命) | 18.6分钟 | 12.4分钟 | |||||
4韧性和粘附(刀具寿命) | 46分钟 | 24分钟 | |||||
5韧性(物件号) | 7个物件 | 2个物件 | |||||
6掉皮 | 有限的 | 普遍的 | |||||
7刀刃韧性(损坏长度) | 11.5mm | 14.7mm | |||||
8塑性变形(刀具寿命) | 18分钟 | 13分钟 | |||||
9后刀面磨损和塑性变形(物件号) | 32个物件 | 19个物件 |
总之可以认为,从上述实施例的结果看很明显,通过将给定组成的硬质合金基底、具有特定厚度的多层涂层的选择以及特定刀刃处理相结合,工具嵌入件具有优异的切削性能,因为它结合了如在前言部分中所述的多个被认为是对立的性能。
Claims (9)
1.一种刀具嵌入件,特别适用于车削钢材,包括硬质合金体,经过后处理的涂层,其特征在于:
首先,至少两层TiCxNyOz的最里层***,其中x+y+z≤1,
第二,由总共5-31层且优选为11-15层的交替的Al2O3和TiCxNyOz(x+y+z≤1)层、并优选是к-Al2O3和TiN层构成的多层***,Al2O3层其单独的层厚<0.5μm,优选为0.2-0.5μm,TiCxNyOz层其单独的层厚为0.01-0.2μm,优选为0.02-0.15μm,该多层的总厚度为1.0-4.0μm,优选为1.5-3.5μm,其中该多层沿着刀刃线暴露,并进入前刀面和后刀面,从而在前刀面上的暴露a是0.03<a<0.9mm,在后刀面上的暴露b为0.02mm<b<0.2mm,并且a>b。
2.如权利要求1的刀具,其特征在于该最里层***包括:
第一层TiCxNyOz,其中x+y+z≤1,优选y>x并且z<0.2,最优选为y>0.8且z=0,而且等轴晶粒其尺寸<0.5μm并且总厚度<1.5μm但是>0.1μm,优选为0.1-0.6μm;
第二层TiCxNyOz,其中x+y+z≤1,优选z=0、x>0.3并且y>0.3,最优选为x>0.5,而且柱状晶粒其厚度为0.4-3.9μm优选为1.5-3.0μm。
3.如权利要求2的刀具,其特征在于该最里层***包括:
第三层TiCxNyOz,其中x+y+z≤1,优选y>x并且z<0.2,最优选为y>0.8且z=0,而且等轴晶粒其尺寸<0.5μm并且总厚度<1.5μm但是>0.1μm,优选为0.2-0.8μm。
4.如权利要求1-3任一项的刀具,其特征在于最里层***的总厚度为0.7-4.5μm,优选为1.2-4.0μm。
5.如权利要求1-4任一项的刀具,其特征在于在多层顶部上的最外层***为一层或多层的TiCxNy(x+y≤1)或其结合,优选是顺序为TiN、TiC和TiN的三层。
6.如权利要求1-5任一项的刀具,其特征在于涂层的总厚度为2.0-8.0μm,优选为4.0-7.0μm。
7.如权利要求1-6任一项的刀具,其特征在于多层和部分的最里面的TiCxNyOz层***沿着刀刃线暴露。
8.如权利要求1-7任一项的刀具,其特征在于该硬质合金基底的组分为7-10.5wt%且优选为8.0-9.5wt%的Co和0.2-1.6wt%且优选为0.4-1.0wt%的金属Ta、Nb和Ti的立方碳化物或者其它来自元素周期表的族IVb、Vb或VIb中的元素的碳化物以及平衡量的碳化钨,碳化钨其平均晶粒大小优选为1.5-3.5μm、优选为1.9-2.1μm。
9.如权利要求1-7任一项的刀具,其特征在于硬质合金基底在表面附近具有耗尽立方碳化物并且富集有粘合剂相的空间,距离该表面的间距为5-50μm,基底组成包括7.0-10.5wt%Co和4.0-9.0wt%立方碳化物以及平衡量碳化钨(WC),该立方碳化物是来自元素周期表的族IVb、Vb或VIb中的元素且优选为Nb、Ta和/或Ti的碳化物,N的量为0.01-0.2wt%。
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CN1974205B (zh) * | 2005-12-02 | 2011-11-23 | 三菱麻铁里亚尔株式会社 | 表面包覆切削刀片及其制造方法 |
CN101088759B (zh) * | 2006-06-16 | 2010-06-16 | 山特维克知识产权股份有限公司 | 涂层切削工具刀片 |
CN101473063B (zh) * | 2006-06-22 | 2012-11-28 | 钴碳化钨硬质合金公司 | 包括氧化铝和/或含钛材料的cvd涂覆方案及其制造方法 |
CN102245801B (zh) * | 2008-12-10 | 2014-08-20 | 山高刀具公司 | 制造对尺寸精度具有高要求的切削工具刀片的方法 |
CN104870686A (zh) * | 2012-12-21 | 2015-08-26 | 山特维克知识产权股份有限公司 | 涂布切削工具及其制造方法 |
CN109311099A (zh) * | 2016-06-14 | 2019-02-05 | 住友电工硬质合金株式会社 | 表面被覆切削工具 |
US10987738B2 (en) | 2016-06-14 | 2021-04-27 | Sumitomo Electric Hardmetal Corp. | Surface-coated cutting tool |
CN110678579A (zh) * | 2017-06-20 | 2020-01-10 | 山特维克知识产权股份有限公司 | 涂层切削工具 |
CN110678579B (zh) * | 2017-06-20 | 2021-12-10 | 山特维克知识产权股份有限公司 | 涂层切削工具 |
CN109500414A (zh) * | 2017-09-14 | 2019-03-22 | 株式会社泰珂洛 | 被覆切削工具 |
CN109500414B (zh) * | 2017-09-14 | 2020-08-28 | 株式会社泰珂洛 | 被覆切削工具 |
CN111118465A (zh) * | 2019-12-31 | 2020-05-08 | 沈阳中北通磁科技股份有限公司 | 一种烧结钕铁硼磁体表面功能膜层及其制备方法 |
Also Published As
Publication number | Publication date |
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SE0300175L (sv) | 2004-07-25 |
SE526603C2 (sv) | 2005-10-18 |
SE526603C3 (sv) | 2005-11-16 |
US7153562B2 (en) | 2006-12-26 |
JP5529771B2 (ja) | 2014-06-25 |
CN100478498C (zh) | 2009-04-15 |
SE0300175D0 (sv) | 2003-01-24 |
KR20040068476A (ko) | 2004-07-31 |
JP2011067948A (ja) | 2011-04-07 |
EP1455003A3 (en) | 2008-06-18 |
US20040180241A1 (en) | 2004-09-16 |
EP1455003B1 (en) | 2014-05-21 |
EP1455003A2 (en) | 2004-09-08 |
JP2004223711A (ja) | 2004-08-12 |
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