WO2018232813A1 - 一种电动工具用混合粉及其制备方法 - Google Patents

一种电动工具用混合粉及其制备方法 Download PDF

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WO2018232813A1
WO2018232813A1 PCT/CN2017/094156 CN2017094156W WO2018232813A1 WO 2018232813 A1 WO2018232813 A1 WO 2018232813A1 CN 2017094156 W CN2017094156 W CN 2017094156W WO 2018232813 A1 WO2018232813 A1 WO 2018232813A1
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powder
parts
mixed
water atomized
power tool
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PCT/CN2017/094156
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English (en)
French (fr)
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季威威
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江苏军威电子科技有限公司
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Publication of WO2018232813A1 publication Critical patent/WO2018232813A1/zh

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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
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • 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
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/16—Ferrous alloys, e.g. steel alloys containing copper

Definitions

  • the invention relates to the technical field of electric tool manufacturing, in particular to a mixed powder for a power tool and a preparation method thereof.
  • alloying elements can not be further alloyed during the sintering process; alloying element segregation occurs during transportation and mixing; fine alloying element particles can cause bulging or agglomeration, so that the mechanical parts of the sintered parts Performance is affected.
  • the present invention provides a hybrid powder for a power tool and a preparation method thereof, which has high compressibility, can be further completely alloyed in the sintering process, and maintains dimensional stability, and can effectively improve the sintered part. Mechanical properties.
  • a mixed powder for a power tool according to the present invention comprising the following components by mass: 45-50 parts of water atomized diffusion alloy powder, 1-3 parts of graphite powder, 0.5-2 parts of copper powder, 1-3 parts of magnesium powder, 0.5-1 part of tungsten carbide powder, 1-2 parts of lubricant, and the balance is water atomized pure iron powder.
  • the chemical composition of the water atomized diffusion alloy powder is: Si ⁇ 0.50%, Mn ⁇ 0.50%, P ⁇ 0.050%, S ⁇ 0.050%, Ni 1.53 ⁇ 1.97%, Cu 1.30 ⁇ 1.68%, Mo 0.10 ⁇ 0.62%, Fe is the balance;
  • the chemical composition of the water atomized pure iron powder is C ⁇ 0.60%, Si ⁇ 0.50%, Mn ⁇ 0.50%, P ⁇ 0.050%, S ⁇ 0.050%, and Fe is the balance. .
  • the lubricant comprises 15 to 25% by weight of zinc stearate and 75 to 85% of micronized wax by weight.
  • the graphite powder has a particle size of ⁇ 10 ⁇ m and a copper powder particle size of ⁇ 75 ⁇ m.
  • the method for preparing a mixed powder for a power tool includes the following steps:
  • the mixed powder for a power tool of the present invention has high compressibility, can be further completely alloyed during the sintering process, and maintains dimensional stability, and can effectively improve the mechanical properties of the sintered part.
  • a mixed powder for electric tools comprising the following parts by mass: 45-50 parts of water atomized diffusion alloy powder, 1-3 parts of graphite powder, 0.5-2 parts of copper powder, 1-3 parts of magnesium powder, carbonization 0.5-1 part of tungsten powder, 1-2 parts of lubricant, and the balance is water atomized pure iron powder.
  • the chemical composition of the water atomized diffusion alloy powder is: Si ⁇ 0.50%, Mn ⁇ 0.50%, P ⁇ 0.050%, S ⁇ 0.050%, Ni 1.53 ⁇ 1.97%, Cu 1.30 ⁇ 1.68%, Mo 0.10 ⁇ 0.62%, Fe is the balance;
  • the chemical composition of the water atomized pure iron powder is C ⁇ 0.60%, Si ⁇ 0.50%, Mn ⁇ 0.50%, P ⁇ 0.050%, S ⁇ 0.050%, and Fe is the balance. .
  • the lubricant comprises 15 to 25% by weight of zinc stearate and 75 to 85% of micronized wax by weight.
  • the graphite powder has a particle size of ⁇ 10 ⁇ m and a copper powder particle size of ⁇ 75 ⁇ m.
  • the method for preparing a mixed powder for a power tool includes the following steps:
  • a water atomized pure iron powder having a bulk density of 2.95 to 3.10 g/cm 3 and a compression density of more than 7.09 g/cm 3 ; a water atomized diffusion alloy powder, a copper powder, a magnesium powder, a tungsten carbide powder, a graphite powder, The appearance of the lubricant should be free of oxidation, agglomeration, inclusions and large particles;

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Powder Metallurgy (AREA)

Abstract

一种电动工具用混合粉，包括如下质量份数的组分：水雾化扩散合金粉45-50份、石墨粉1-3份、铜粉0.5-2份、镁粉1-3份、碳化钨粉0.5-1份、润滑剂1-2份、余量为水雾化纯铁粉。以及该混合粉的制备方法。本电动工具用混合粉具有较高的压缩性，在烧结过程中能进一步完全合金化，且保持尺寸的稳定，能有效改善烧结件的机械性能。

Description

一种电动工具用混合粉及其制备方法 技术领域
本发明涉及电动工具制造技术领域，具体涉及一种电动工具用混合粉及其制备方法。
背景技术
为了提高粉末冶金制品强度、韧性和表观硬度，目前采用的是烧结—淬火—回火生产工艺。通过选择适当的合金元素，能有效地提高材料的淬硬性，使制品在经过一系列热处理过程中发生马氏体相变，同时又具有一定的韧性，水雾化合金粉可有效地提高粉末冶金制品综合机械性能，尤其是电动工具等耐冲击产品上具有良好的综合性能，并能保证粉末冶金制品的尺寸公差，若采用合金原料直接混合方式其不足之处是，压缩密度不够高，只能达到7g/cm3以下；合金元素在制品烧结过程中不能进一步完全合金化；在运输和混合处理过程中会产生合金元素成分偏析；细的合金元素粉颗粒会造成隆起或团聚，使烧结件的机械性能受影响。
发明内容
发明目的：本发明针对不足，提出一种电动工具用混合粉及其制备方法，具有较高的压缩性，在烧结过程中能进一步完全合金化，且保持尺寸的稳定，且能有效改善烧结件的机械性能。
技术方案：本发明所述的一种电动工具用混合粉，包括如下质量份数的组分：水雾化扩散合金粉45-50份、石墨粉1-3份、铜粉0.5-2份、镁粉1-3份、碳化钨粉0.5-1份、润滑剂1-2份、余量为水雾化纯铁粉。
进一步的，所述的水雾化扩散合金粉中的化学成分按重量百分比为：Si≤0.50％、Mn≤0.50％、P≤0.050％、S≤0.050％、Ni 1.53～1.97％、Cu 1.30～1.68％、Mo0.10～0.62％，Fe为余量；
进一步的，所述的水雾化纯铁粉中的化学成分按重量百分比为：C≤0.60％、Si≤0.50％、Mn≤0.50％、P≤0.050％、S≤0.050％，Fe为余量。
进一步的，所述的润滑剂中按重量百分比包括15～25％硬脂酸锌和75～85％的微粉蜡。
进一步的，所述的石墨粉粒度≤10μm，铜粉粒度≤75μm。
上述一种电动工具用混合粉的制备方法，包括如下步骤：
1)选择松装密度2.95～3.10g/cm 3和压缩密度大于7.09g/cm 3的水雾化纯铁粉；水雾化扩散合金粉、铜粉、镁粉、碳化钨粉、石墨粉、润滑剂的外观应无氧化，结块，夹杂物和 大颗粒；
2)按配方将全部组分的水雾化扩散合金粉、水雾化纯铁粉、石墨粉、铜粉、镁粉、碳化钨粉加入混料机中混合40～60分钟，加入配方量的润滑剂再混合20～30分钟，检测松装密度、压缩性和流动性，如不合格再混合15～20分钟；
3)取样检测各项指标，包装后即为成品。
有益效果：本发明的电动工具用混合粉具有较高的压缩性，在烧结过程中能进一步完全合金化，且保持尺寸的稳定，且能有效改善烧结件的机械性能。
具体实施方式
下面结合具体实施例对本发明作进一步说明：
实施例1
一种电动工具用混合粉，包括如下质量份数的组分：水雾化扩散合金粉45-50份、石墨粉1-3份、铜粉0.5-2份、镁粉1-3份、碳化钨粉0.5-1份、润滑剂1-2份、余量为水雾化纯铁粉。
进一步的，所述的水雾化扩散合金粉中的化学成分按重量百分比为：Si≤0.50％、Mn≤0.50％、P≤0.050％、S≤0.050％、Ni 1.53～1.97％、Cu 1.30～1.68％、Mo0.10～0.62％，Fe为余量；
进一步的，所述的水雾化纯铁粉中的化学成分按重量百分比为：C≤0.60％、Si≤0.50％、Mn≤0.50％、P≤0.050％、S≤0.050％，Fe为余量。
进一步的，所述的润滑剂中按重量百分比包括15～25％硬脂酸锌和75～85％的微粉蜡。
进一步的，所述的石墨粉粒度≤10μm，铜粉粒度≤75μm。
上述一种电动工具用混合粉的制备方法，包括如下步骤：
1)选择松装密度2.95～3.10g/cm 3和压缩密度大于7.09g/cm 3的水雾化纯铁粉；水雾化扩散合金粉、铜粉、镁粉、碳化钨粉、石墨粉、润滑剂的外观应无氧化，结块，夹杂物和大颗粒；
2)按配方将全部组分的水雾化扩散合金粉、水雾化纯铁粉、石墨粉、铜粉、镁粉、碳化钨粉加入混料机中混合40～60分钟，加入配方量的润滑剂再混合20～30分钟，检测松装密度、压缩性和流动性，如不合格再混合15～20分钟；
3)取样检测各项指标，包装后即为成品。
以上所述，仅是本发明的较佳实施例而已，并非对本发明作任何形式上的限制，虽然本发明已以较佳实施例揭露如上，然而并非用以限定本发明，任何熟悉本专业的技术人员，在不脱 离本发明技术方案范围内，当可利用上述揭示的技术内容作出些许更动或修饰为等同变化的等效实施例，但凡是未脱离本发明技术方案的内容，依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化与修饰，均仍属于本发明技术方案的范围内。

Claims (6)

  1. 一种电动工具用混合粉，其特征在于：包括如下质量份数的组分：水雾化扩散合金粉45-50份、石墨粉1-3份、铜粉0.5-2份、镁粉1-3份、碳化钨粉0.5-1份、润滑剂1-2份、余量为水雾化纯铁粉。
  2. 根据权利要求1所述的一种电动工具用混合粉，其特征在于：所述的水雾化扩散合金粉中的化学成分按重量百分比为：Si≤0.50％、Mn≤0.50％、P≤0.050％、S≤0.050％、Ni 1.53～1.97％、Cu 1.30～1.68％、Mo0.10～0.62％，Fe为余量；
  3. 根据权利要求1所述的一种电动工具用混合粉，其特征在于：所述的水雾化纯铁粉中的化学成分按重量百分比为：C≤0.60％、Si≤0.50％、Mn≤0.50％、P≤0.050％、S≤0.050％，Fe为余量。
  4. 根据权利要求1所述的一种电动工具用混合粉，其特征在于：所述的润滑剂中按重量百分比包括15～25％硬脂酸锌和75～85％的微粉蜡。
  5. 根据权利要求1所述的一种电动工具用混合粉，其特征在于：所述的石墨粉粒度≤10μm，铜粉粒度≤75μm。
  6. 根据权利要求1-5任意一项所述的一种电动工具用混合粉的制备方法，其特征在于：包括如下步骤：
    1)选择松装密度2.95～3.10g/cm 3和压缩密度大于7.09g/cm 3的水雾化纯铁粉；水雾化扩散合金粉、铜粉、镁粉、碳化钨粉、石墨粉、润滑剂的外观应无氧化，结块，夹杂物和大颗粒；
    2)按配方将全部组分的水雾化扩散合金粉、水雾化纯铁粉、石墨粉、铜粉、镁粉、碳化钨粉加入混料机中混合40～60分钟，加入配方量的润滑剂再混合20～30分钟，检测松装密度、压缩性和流动性，如不合格再混合15～20分钟；
    3)取样检测各项指标，包装后即为成品。
PCT/CN2017/094156 2017-06-20 2017-07-24 一种电动工具用混合粉及其制备方法 WO2018232813A1 (zh)

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