CN106756403A - 一种精密复合拉刀加工工艺 - Google Patents
一种精密复合拉刀加工工艺 Download PDFInfo
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- 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
- C22C29/14—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on borides
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- 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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/20—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by extruding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
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- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/05—Mixtures of metal powder with non-metallic powder
- C22C1/051—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
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- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/20—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by extruding
- B22F2003/208—Warm or hot extruding
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- 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
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- 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
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
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- 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
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Abstract
本发明公开了一种精密复合拉刀加工工艺,包括以下步骤:步骤一、按比例称取的各原料,通过球磨机进行湿磨;步骤二、在‑0.20~‑0.14Pa真空条件下,将步骤一得到的浆料在125~135℃干燥;步骤三、将步骤二得到的粉料在机械成型机内挤压成型、固化,固化温度为30~50℃,固化时间为4~6小时;步骤四、将步骤三中固化后的材料在真空炉中进行烧结。本发明拉刀材料配方和加工工艺得到的刀具,强度和硬度高、耐磨性好、红硬性好、热膨胀系数小、弹性模量高以及化学稳定性好等一系列优良性能,其广泛应用于各种拉刀上。
Description
技术领域
本发明涉及一种精密复合拉刀加工工艺。
背景技术
拉刀表面上有多排刀齿,各排刀齿的尺寸和形状从切入端至切出端依次增加和变化。当拉刀作拉削运动时,每个刀齿就从工件上切下一定厚度的金属,最终得到所要求的尺寸和形状。拉刀常用于成批和大量生产中加工圆孔、花键孔、键槽、平面和成形表面等,生产率很高。拉刀按加工表面部位的不同,分为内拉刀和外拉刀;按工作时受力方式的不同,分为拉刀和推刀。推刀常用于校准热处理后的型孔。
但由于拉刀材料韧性不够高、硬度低,使用一段时间后,会容易出现局部划伤缺陷时,例如,刀齿刃口有碰伤的缺口;拉刀经过多次刃磨后容屑槽的形状造成不光滑的台阶形,以致使切屑卷曲不顺利而挤坏.刀齿和划伤加工表面等。
发明内容
本发明提供一种精密复合拉刀的加工工艺,其特征在于包括以下步骤:
步骤一、按比例称取的各种粉末原料,通过球磨机进行湿磨;
步骤二、在-0.20~-0.14Pa真空条件下,将步骤一得到的浆料在125~135℃干燥;
步骤三、将步骤二得到的粉料在机械成型机内挤压成型、固化,固化温度为30~50℃,固化时间为4~6小时;
步骤四、将步骤三中固化后的材料在真空炉中进行烧结。
进一步地,在上述技术方案中,烧结温度800~910℃,真空度-0.15~-0.25Pa,烧结2.5~3.5小时。
进一步地,在上述技术方案中,所述粉末原料由以下重量份原料组成:72~85份硼化钨、5~8份二硅化铌、0.08~0.1份Al、0.08~0.1份Fe、1~1.5份Mo、1.3~2.5份羟基铁粉、1.3~2.2份TiC、0.8~2.1份二氧化锆、0.2~0.6份酰胺。
进一步地,在上述技术方案中,所述粉末原料由以下重量份原料组成:75~80份硼化钨、6~7份二硅化铌、0.08~0.09份Al、0.08~0.09份Fe、1.1~1.2份Mo、1.5~2份羟基铁粉、1.5~2份TiC、0.9~0.5份二氧化锆、0.3~0.5份酰胺。
进一步地,在上述技术方案中,所述粉末原料由以下重量份原料组成:78~80份硼化钨、6~7份二硅化铌、0.08份Al、0.1份Fe、1~1.2份Mo、1.8~2份羟基铁粉、1.8~2份TiC、1.6~1.9份二氧化锆、0.4~0.5份酰胺。
进一步地,在上述技术方案中,所述酰胺选自RCONH2,R为碳数为2~5的脂肪链。
进一步地,在上述技术方案中,原料为小于100目的粉末。
发明有益效果
本发明拉刀材料配方和加工工艺得到的刀具,强度和硬度高、耐磨性好、红硬性好、热膨胀系数小、弹性模量高以及化学稳定性好等一系列优良性能,其广泛应用于各种拉刀上。
具体实施方式
下述非限定性实施例可以使本领域的普通技术人员更全面地理解本发明,但不以任何方式限制本发明。
实施例1
一种精密复合拉刀,由以下重量份原料组成:72份硼化钨、5份二硅化铌、0.08份Al、0.08份Fe、1份Mo、1.3份羟基铁粉、1.3份TiC、0.8份二氧化锆、0.2份乙酰胺。
原料为小于100目的粉末。
精密复合拉刀的加工工艺,包括以下步骤:
步骤一、按上述比例称取的各原料,通过球磨机进行湿磨;
步骤二、在-0.20Pa真空条件下,将步骤一得到的浆料在125℃干燥;
步骤三、将步骤二得到的粉料在机械成型机内挤压成型、固化,固化温度为30℃,固化时间为6小时;
步骤四、将步骤三中固化后的材料在真空炉中进行烧结,烧结温度800℃,真空度-0.15Pa,烧结3.5小时。
实施例2
一种精密复合拉刀,由以下重量份原料组成:85份硼化钨、8份二硅化铌、0.1份Al、0.1份Fe、1.5份Mo、2.5份羟基铁粉、2.2份TiC、2.1份二氧化锆、0.6份丙酰胺。
原料为小于100目的粉末。
精密复合拉刀的加工工艺,包括以下步骤:
步骤一、按上述比例称取的各原料,通过球磨机进行湿磨;
步骤二、在-0.14Pa真空条件下,将步骤一得到的浆料在135℃干燥;
步骤三、将步骤二得到的粉料在机械成型机内挤压成型、固化,固化温度为50℃,固化时间为4小时;
步骤四、将步骤三中固化后的材料在真空炉中进行烧结,烧结温度910℃,真空度-0.25Pa,烧结2.5小时。
Claims (7)
1.一种精密复合拉刀的加工工艺,其特征在于包括以下步骤:
步骤一、按比例称取的各种粉末原料,通过球磨机进行湿磨;
步骤二、在-0.20~-0.14Pa真空条件下,将步骤一得到的浆料在125~135℃干燥;
步骤三、将步骤二得到的粉料在机械成型机内挤压成型、固化,固化温度为30~50℃,固化时间为4~6小时;
步骤四、将步骤三中固化后的材料在真空炉中进行烧结。
2.根据权利要求1所述精密复合拉刀的加工工艺,其特征在于:烧结温度800~910℃,真空度-0.15~-0.25Pa,烧结2.5~3.5小时。
3.根据权利要求1所述精密复合拉刀的加工工艺,其特征在于:所述粉末原料由以下重量份原料组成:72~85份硼化钨、5~8份二硅化铌、0.08~0.1份Al、0.08~0.1份Fe、1~1.5份Mo、1.3~2.5份羟基铁粉、1.3~2.2份TiC、0.8~2.1份二氧化锆、0.2~0.6份酰胺。
4.根据权利要求1所述精密复合拉刀的加工工艺,其特征在于:所述粉末原料由以下重量份原料组成:75~80份硼化钨、6~7份二硅化铌、0.08~0.09份Al、0.08~0.09份Fe、1.1~1.2份Mo、1.5~2份羟基铁粉、1.5~2份TiC、0.9~0.5份二氧化锆、0.3~0.5份酰胺。
5.根据权利要求1所述精密复合拉刀的加工工艺,其特征在于:所述粉末原料由以下重量份原料组成:78~80份硼化钨、6~7份二硅化铌、0.08份Al、0.1份Fe、1~1.2份Mo、1.8~2份羟基铁粉、1.8~2份TiC、1.6~1.9份二氧化锆、0.4~0.5份酰胺。
6.根据权利要求1所述精密复合拉刀的加工工艺,其特征在于:所述酰胺选自RCONH2,R为碳数为2~5的脂肪链。
7.根据权利要求1所述精密复合拉刀的加工工艺,其特征在于:原料为小于100目的粉末。
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Citations (6)
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JPH09291322A (ja) * | 1996-04-25 | 1997-11-11 | Kyocera Corp | 高熱伝導性複合材料 |
JP2007107068A (ja) * | 2005-10-14 | 2007-04-26 | Akebono Brake Ind Co Ltd | 焼結摩擦材 |
CN101037566A (zh) * | 2005-12-22 | 2007-09-19 | 莫门蒂夫性能材料股份有限公司 | 耐磨低摩擦涂料组合物,涂布元件,以及制备所述涂料组合物的方法 |
CN103014392A (zh) * | 2012-12-27 | 2013-04-03 | 株洲硬质合金集团有限公司 | 硬质合金挤压成型剂及其制备、以及在挤压生产中的应用 |
CN103388088A (zh) * | 2013-06-29 | 2013-11-13 | 蚌埠市鸿安精密机械有限公司 | 一种硬质合金铰刀 |
CN106119657A (zh) * | 2016-08-11 | 2016-11-16 | 青岛文创科技有限公司 | 一种兼具高耐磨性和高韧性的硬质合金及其制备方法 |
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- 2016-12-09 CN CN201611130507.4A patent/CN106756403A/zh active Pending
Patent Citations (6)
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JPH09291322A (ja) * | 1996-04-25 | 1997-11-11 | Kyocera Corp | 高熱伝導性複合材料 |
JP2007107068A (ja) * | 2005-10-14 | 2007-04-26 | Akebono Brake Ind Co Ltd | 焼結摩擦材 |
CN101037566A (zh) * | 2005-12-22 | 2007-09-19 | 莫门蒂夫性能材料股份有限公司 | 耐磨低摩擦涂料组合物,涂布元件,以及制备所述涂料组合物的方法 |
CN103014392A (zh) * | 2012-12-27 | 2013-04-03 | 株洲硬质合金集团有限公司 | 硬质合金挤压成型剂及其制备、以及在挤压生产中的应用 |
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Non-Patent Citations (1)
Title |
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陈勇志等主编: "《机械制造工程技术基础》", 28 February 2015 * |
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