CN101745933A - 旋转切割刀具刀片 - Google Patents

旋转切割刀具刀片 Download PDF

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CN101745933A
CN101745933A CN200910253770A CN200910253770A CN101745933A CN 101745933 A CN101745933 A CN 101745933A CN 200910253770 A CN200910253770 A CN 200910253770A CN 200910253770 A CN200910253770 A CN 200910253770A CN 101745933 A CN101745933 A CN 101745933A
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rotary cutter
cutter knife
carbide alloy
weight ratio
surplus
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迈克尔·卡蓬特
巴特·得·布留涅
丹尼尔·塔特塔维兹
让·帕贾特
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Sandvik Intellectual Property AB
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/384—Cutting-out; Stamping-out using rotating drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/0006—Cutting members therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/12—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
    • B26D1/25—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member
    • B26D1/34—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut
    • B26D1/40—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut and coacting with a rotary member
    • B26D1/405—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut and coacting with a rotary member for thin material, e.g. for sheets, strips or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/56—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which travels with the work otherwise than in the direction of the cut, i.e. flying cutter
    • B26D1/62—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which travels with the work otherwise than in the direction of the cut, i.e. flying cutter and is rotating about an axis parallel to the line of cut, e.g. mounted on a rotary cylinder
    • B26D1/626—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which travels with the work otherwise than in the direction of the cut, i.e. flying cutter and is rotating about an axis parallel to the line of cut, e.g. mounted on a rotary cylinder for thin material, e.g. for sheets, strips or the like
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
    • C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
    • C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
    • C22C29/08—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds based on tungsten carbide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F2005/001—Cutting tools, earth boring or grinding tool other than table ware
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/0006—Cutting members therefor
    • B26D2001/002—Materials or surface treatments therefor, e.g. composite materials
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/04—Processes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/929—Tool or tool with support
    • Y10T83/9372—Rotatable type

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Nonmetal Cutting Devices (AREA)
  • Powder Metallurgy (AREA)

Abstract

本发明涉及一种硬质合金的旋转切割刀具，其包括包含WC的硬质相，以及粘结相，其中，硬质合金包括7-12wt-％的Co+Ni，Co/Ni重量比为0-4，0.5-3wt-％的Cr，以及0.1-0.3wt-％的Mo。

Description

旋转切割刀具刀片
技术领域
本发明涉及一种切割用于女性护理用品和尿布产品的复合材料的碳化物旋转切割刀具刀片(CRC)。
背景技术
一般而言，旋转切割刀具的旋转处于1000rpm的等级，而在刀片刀刃受损而需要重新磨锐或更换之前的其预期使用寿命为大约1千万次切割。切割刀具与砧座之间的接触的初始‘气动千斤顶’压力为大约2Bar。这在数百万次切割之后会增大，以补偿轻微的磨损，并得到整齐的切割，最大4Bar还表示极端磨损，并需要重新磨锐刀片。
CRC系统为连续过程，且因此在重新磨锐时间间隔之间的可靠且可预测的使用寿命是必要的。
本发明的目的在于提供性能得到改善的旋转切割刀具刀片。
发明内容
本发明提供了一种硬质合金的旋转切割刀具刀片，其包括包含WC的硬质相，以及粘结相，其中，硬质合金包括7-12wt-％的Co+Ni，Co/Ni重量比为0-4，0.5-3wt-％的Cr，以及0.1-0.3wt-％的Mo。
在一个实施例中，硬质合金包括包含WC的硬质相，以及粘结相，其中，硬质合金包括8-12wt-％的Co+Ni，Co/Ni重量比为0-4，0.5-2wt-％的Cr，以及0.1-0.3wt-％的Mo。
在一个实施例中，粘结相中的Co/Ni重量比为0.25-4。
在另一实施例中，粘结相中的Co/Ni重量比为0-＜0.25，优选为0，即不存在Co。
适合的是，基本上所有WC晶粒均具有＜1μm的尺寸，意思是适当地超过95％、优选为97％的WC晶粒具有＜1μm的尺寸。适合的是，平均WC晶粒尺寸＜1μm，优选＜0.7μm。
如果粘结相包含7wt-％至14wt-％之间的Cr+Mo，适合的是在8wt-％至14wt-％之间的Cr+Mo，优选的是在9wt-％至13wt-％之间的Cr+Mo，则是有利的。
在一个可替代实施例中，粘结相包含20wt-％至24wt-％之间的Cr+Mo，适合的是在21wt-％至23wt-％之间的Cr+Mo。
优选的是，总的碳含量为6.13-(0.05±0.01)×粘合相(Co+Ni)wt-％含量，也就是说，硬质合金中的总的碳含量(wt-％)优选为6.13-(0.05±0.01)×y，其中，y为Co+Ni的wt-％含量。
在一个实施例中，硬质合金具有以下成分，6-8wt-％的Co、2-3wt-％的Ni、0.8-2wt-％的Cr和0.1-0.3wt-％的Mo，余量为WC。
在另一实施例中，硬质合金具有以下成分：3-4wt-％的Co、6-8wt-％的Ni、1-1.5wt-％的Cr和0.1-0.3wt-％的Mo，余量为WC。
在另一实施例中，硬质合金具有以下成分：7-10wt-％的Ni、合适的是8-10wt-％的Ni、0.5-2wt-％的Cr和0.1-0.3wt-％的Mo，余量为WC。
在另一实施例中，硬质合金具有以下成分：9-10wt-％的Ni、2-3wt-％的Cr和0.1-0.3wt-％的Mo，余量为WC。
用于制造女性护理用品和尿布产品等的复合材料为具有特殊吸收层的无纺纤维。已发现，当包含高氯化物含量、胶、以及包含硬质纳米级金属氧化物晶体的洗液时，这些材料在旋转切割产品形状期间，尤其地在切割刀具刀片刀刃与砧座之间的接触面处组合在一起以形成磨损-腐蚀环境。旋转切割刀具刀片由硬质合金与具有特殊粘合剂设计制成，用以相对于所切割的介质使硬质合金得到极好的耐磨损腐蚀性。为了实现良好的耐磨性和适当的韧性，硬质合金的等级适合使用亚微米级碳化钨，并且粘合剂含量足够高，以保持高韧性。为了得到良好的抵抗所存在的氯化物的腐蚀的能力，粘合剂由‘不锈钢’合金(例如，见实例1)制成。
本发明还涉及根据本发明的旋转切割刀具刀片在腐蚀-磨损环境中的旋转切割刀具应用场合中的用途。旋转切割刀具提供了对氯化物酸性腐蚀条件下的硬质颗粒磨损的良好抵抗性。
实例1
具有根据表1的wt-％成分的硬质合金等级根据已知的方法且使用FSSS晶粒尺寸为0.8μm的WC粉末制造。
在本发明的某些实施例中，硬质合金的单独组分为下面所列的那些，以及任何正常的微量杂质。
硬质合金结构包括使用由截线法测量到的平均晶粒尺寸＜1μm的WC，并且具有如图1中所示的实际颗粒尺寸分布(A：单位为μm的晶粒尺寸；B：连续分布函数的％累计数目概率)。硬质合金的实际平均WC晶粒尺寸为大约0.5μm(见图1)。WC的晶粒尺寸和分布通过根据ISO草图标准4499-2：2008的截线法测得。
材料具有1500-1800HV30的硬度，这取决于所选择的成分。
用于本发明的硬质合金由形成硬质组分的粉末制备而成，而且将形成粘合物的粉末一起湿磨、干燥，压制成具有所期望的形状的基体并烧结。
根据下面的表1，相对于CRC标准硬质合金(E)的前述现有技术测试了根据本发明成分的硬质合金CRC基体。
表1(成分，wt-％)
  标号   A   B   C   D   E
  样本   本发明   本发明   本发明   本发明   现有技术
  WC   余量   余量   余量   余量   余量
  其它
  Co   6.6   3.5   -   -   10
  标号   A   B   C   D   E
  Ni   2.2   7.0   8.0   9.5   -
  Cr   1.0   1.3   0.7   2.5   0.43
  Mo   0.2   0.2   0.2   0.2   -
  dWC(μm)   0.8   0.8   0.8   0.8   0.8
根据ASTM标准G61和G65(包括酸性介质)来对硬质合金候选等级腐蚀试片进行磨损和腐蚀测试。
已经测得的其它性质是根据用于硬质合金领域的标准，即，用于密度的ISO 3369：1975，用于硬度的ISO 3878：1983，以及用于耐磨能力的ASTM G65。
根据ASTM61标准，耐腐蚀能力的特征表现为尤其适于在氯化物溶液中测量(Co，Ni，Fe)的腐蚀。
这还可为发生在磨损机理与腐蚀机理之间的协同效应。
下面的表2中提供了结果。
表2
  标号   A   B   C   D   E
  样本   本发明   本发明   本发明   本发明   现有技术
密度 14.45 14.6 14.6 14.2 14.5
硬度(HV30) 1650 1550 1615 1600 1600
  韧性(Klc)MN/mm1.5   11.0   12.0   10.5   10.5   12.0
  耐磨性体积损失(mm-3)   0.2   0.2   0.2   0.2   0.2
  耐腐蚀性*   7.0   5.5   7.5   8.0   2.3
  性能寿命百万次切割 ＞20** ＞20** ＞20** ＞20** 10
*根据ASTM61的利用冲洗端口单元(flushed port cell)的损坏势能Eb(10μA/cm2)正常等级范围为1-10，其中，不锈钢316＝10
**在重新磨锐之前的预计使用寿命
因此，相比于现有技术E，本发明呈现出如下文所示的改进。
耐腐蚀能力提高了2倍以上。
预计性能从1千万次切割增大到＞2千万次，也就是说，增大2倍以上。
实例2
根据按本发明标号A的成分，使用由硬质金属制造的CRC来进行性能测试。该刀具经受了制造试验，其中，将‘象牙色(ivory)’介质作为受控性能测试的一部分，且与根据现有技术标号E的由硬质金属制成的在切割类似介质时的标准刀具相比。
介质由包含高CaCl2含量的专有织物层构成，其易于与水和湿气进行水合，形成略微有酸性电解液，且对(WC-Co)硬质金属有腐蚀性。介质还包括磨损性的纳米级晶粒尺寸的金属氧化物，例如包含在织物层之间的洗液中的ZnO和SiO2。
根据按本发明标号A的成分由硬质金属制成的CRC的切割次数：＞6千万次(每天切割1百万次)，刀具功能仍然良好。
根据按现有技术标号E的成分由标准硬质金属制成的CRC在刀具需要重新磨锐之前的切割次数：＜1千万次(＜10天)。
刀具A和E的切割带在x200的低倍显微镜下进行腐蚀和磨耗的检验。
按本发明标号A的刀具：没有明显的腐蚀迹象。
根据现有技术标号E的刀具：表现出明显的结合有碳化物裂缝和凹口的腐蚀。

Claims (13)

1.一种硬质合金的旋转切割刀具刀片，包括包含WC的硬质相，以及粘结相，其特征在于，所述硬质合金包括7-12wt-％的Co+Ni、0.5-3wt-％的Cr以及0.1-0.3wt-％的Mo，Co/Ni重量比为0-4。
2.根据权利要求1的旋转切割刀具刀片，其中，所述硬质合金包括8-12wt-％的Co+Ni、0.5-2wt-％的Cr以及0.1-0.3wt-％的Mo，，Co/Ni重量比为0-4。
3.根据权利要求1-2中任一项所述的旋转切割刀具刀片，其中，所述硬质合金具有以下成分：6-8wt-％的Co、2-3wt-％的Ni、0.8-2wt-％的Cr和0.1-0.3wt-％的Mo，余量为WC。
4.根据权利要求1所述的旋转切割刀具刀片，其中，所述硬质合金具有以下成分：3-4wt-％的Co、6-8wt-％的Ni、1-1.5wt-％的Cr和0.1-0.3wt-％的Mo，余量为WC。
5.根据权利要求1所述的旋转切割刀具刀片，其中，所述硬质合金具有以下成分：7-10wt-％的Ni、0.5-2wt-％的Cr和0.1-0.3wt-％的Mo，余量为WC。
6.根据权利要求5所述的旋转切割刀具刀片，其中，所述硬质合金包括8-10wt-％的Ni。
7.根据权利要求1所述的旋转切割刀具刀片，其中，Co/Ni重量比为0.25-4。
8.根据权利要求1所述的旋转切割刀具刀片，其中，Co/Ni重量比为0-＜0.25。
9.根据权利要求1-8中任一项所述的旋转切割刀具刀片，其中，基本上所有WC晶粒均具有＜1μm的尺寸。
10.根据权利要求1-9中任一项所述的旋转切割刀具刀片，其中，所述粘结相包含7wt-％至14wt-％之间的Cr+Mo。
11.根据权利要求10所述的旋转切割刀具刀片，其中，所述粘结相包含8wt-％至14wt-％之间的Cr+Mo。
12.根据权利要求1-11中任一项所述的旋转切割刀具刀片，其中，所述硬质合金中的总的碳含量为6.13-(0.05±0.01)×y，单位为wt-％，其中，y为Co+Ni的含量，单位为wt-％。
13.一种根据权利要求1-12中任一项所述的旋转切割刀具刀片在腐蚀-磨损环境中的旋转切割刀具应用场合下的用途。
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