CN112908674A - 一种稀土永磁体的制备方法 - Google Patents

一种稀土永磁体的制备方法 Download PDF

Info

Publication number
CN112908674A
CN112908674A CN202110094957.7A CN202110094957A CN112908674A CN 112908674 A CN112908674 A CN 112908674A CN 202110094957 A CN202110094957 A CN 202110094957A CN 112908674 A CN112908674 A CN 112908674A
Authority
CN
China
Prior art keywords
permanent magnet
rare earth
earth permanent
powder
mixture
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN202110094957.7A
Other languages
English (en)
Inventor
李昭群
周南平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Anhui Xinke Magnetic Industry Co ltd
Original Assignee
Anhui Xinke Magnetic Industry Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Anhui Xinke Magnetic Industry Co ltd filed Critical Anhui Xinke Magnetic Industry Co ltd
Priority to CN202110094957.7A priority Critical patent/CN112908674A/zh
Publication of CN112908674A publication Critical patent/CN112908674A/zh
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/0253—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
    • H01F41/0266—Moulding; Pressing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
    • H01F1/047—Alloys characterised by their composition
    • H01F1/053—Alloys characterised by their composition containing rare earth metals
    • H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
    • H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
    • H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
    • H01F1/0575—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together
    • H01F1/0576—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together pressed, e.g. hot working
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
    • H01F1/047—Alloys characterised by their composition
    • H01F1/053—Alloys characterised by their composition containing rare earth metals
    • H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
    • H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
    • H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
    • H01F1/0575—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together
    • H01F1/0577—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together sintered
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/0253—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
    • H01F41/026—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets protecting methods against environmental influences, e.g. oxygen, by surface treatment
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/0253—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
    • H01F41/0273—Imparting anisotropy

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Hard Magnetic Materials (AREA)
  • Powder Metallurgy (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)

Abstract

本发明公开了永磁材料加工领域的一种稀土永磁体的制备方法，其制作方法流程包括：S1：配料；S2：粉碎；S3：磁场取向压型；S4：烧结；S5：回火处理；S6：电镀；S7：静电喷涂，该稀土永磁体的制备方法，通过在汝铁硼合金中加入具有高耐温性的碳、镍、铬和钴进行混合、粉碎、磁场取向压型、烧结、回火处理后形成坯体，最终对坯体进行电镀钛镉合金和喷涂环氧树脂，镉合金和环氧树脂具有高强度、耐高温和耐腐蚀性，提高稀土永磁体的热稳定性。

Description

一种稀土永磁体的制备方法
技术领域
本发明涉及永磁材料加工领域，具体为一种稀土永磁体的制备方法。
背景技术
稀土永磁材料，即永磁材料中含有作为合金元素的稀土金属。永磁材料是指把磁化后撤去外磁场而能长期保持较强磁性，稀土永磁分为：钐钴(SmCo)永磁体和钕铁硼(NdFeB)永磁体。其中SmCo磁体的磁能积在15--30MGOe之间，NdFeB系磁体的磁能积在27--50MGOe之间，被称为“永磁王”，是磁性最高的永磁材料。钐钴永磁体，尽管其磁性能优异，但含有储量稀少的稀土金属钐和钴稀缺、昂贵的战略金属钴。
现有的稀土永磁体应用于电机等设备上时，在高温的环境下使用容易发生不可逆退磁情况，热稳定性差。
发明内容
本发明的目的在于提供一种稀土永磁体的制备方法，以解决上述背景技术中提出的现有的稀土永磁体应用于电机等设备上时，在高温的环境下使用容易发生不可逆退磁情况，热稳定性差的问题。
为实现上述目的，本发明提供如下技术方案：一种稀土永磁体的制备方法，包括如下步骤：
S1：配料：准备汝铁硼合金粉末、碳粉、镍粉、铬粉和钴粉进行充分
混合，得到第一混合料；
S2：粉碎：将所述第一混合料置于气流粉碎机中进行粉碎，得到第二
混合物；
S3：磁场取向压型：将所述第二混合物在1.7-2.2T的磁场下进行磁场取向成型，再置于冷等静压机中在200-300MPa的压力下进行冷等静压；
S4：烧结：在真空烧结炉中进行烧结得到坯体；
S5：回火处理：将坯体进行回火处理；
S6：电镀：将回火处理后的坯体通过电镀工艺在坯体表面上镀钛镉合金；
S7：静电喷涂：将静电喷枪内装有环氧树脂粉末喷涂在电镀后的坯体表面，得到稀土永磁体。
优选的，所述配料的质量份数为：汝铁硼合金粉末80-100份，碳粉5-10份、镍粉10-15份、铬粉10-20份。
优选的，所述第二混合物的平均粒径为2-5μm。
优选的，所述烧结的温度为600-700℃，所述烧结的时间为1-3h。
优选的，所述回火处理具体为在300-450℃下再次进行30min-80min的热处理。
优选的，所述环氧树脂粉末喷涂后固化的厚度为0.15-0.2mm。
与现有技术相比，本发明的有益效果是：该稀土永磁体的制备方法，通过在汝铁硼合金中加入具有高耐温性的碳、镍、铬和钴进行混合、粉碎、磁场取向压型、烧结、回火处理后形成坯体，最终对坯体进行电镀钛镉合金和喷涂环氧树脂，镉合金和环氧树脂具有高强度、耐高温和耐腐蚀性，提高稀土永磁体的热稳定性。
具体实施方式
下面本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
实施例1
一种稀土永磁体的制备方法，包括如下步骤：准备质量份数为：汝铁硼合金粉末80份，碳粉5份、镍粉10份、铬粉10份并进行充分混合，得到第一混合料，再将第一混合料置于气流粉碎机中进行粉碎，得到平均粒径为2μm的第二混合物，将第二混合物在1.7的磁场下进行磁场取向成型，再置于冷等静压机中在200的压力下进行冷等静压后,置于温度设置为600℃真空烧结炉中进行烧结3h得到坯体，之后在在300℃下对坯体再次进行80min的热处理，接着通过电镀工艺在坯体表面上镀钛镉合金，最后使用静电喷枪内装有环氧树脂粉末喷涂在电镀后的坯体表面，使喷涂后的环氧树脂固化的厚度为0.15mm，得到稀土永磁体。
实施例2
一种稀土永磁体的制备方法，包括如下步骤：汝铁硼合金粉末90份，碳粉8份、镍粉12份、铬粉15份并进行充分混合，得到第一混合料，再将第一混合料置于气流粉碎机中进行粉碎，得到平均粒径为3μm的第二混合物，将第二混合物在1.9T的磁场下进行磁场取向成型，再置于冷等静压机中在250MPa的压力下进行冷等静压后,置于温度设置为650℃真空烧结炉中进行烧结2h得到坯体，之后在在400℃下对坯体再次进行50min的热处理，接着通过电镀工艺在坯体表面上镀钛镉合金，最后使用静电喷枪内装有环氧树脂粉末喷涂在电镀后的坯体表面，使喷涂后的环氧树脂固化的厚度为1.18mm，得到稀土永磁体。
实施例3
一种稀土永磁体的制备方法，包括如下步骤：汝铁硼合金粉末100份，碳粉10份、镍粉15份、铬粉20份并进行充分混合，得到第一混合料，再将第一混合料置于气流粉碎机中进行粉碎，得到平均粒径为4μm的第二混合物，将第二混合物在2.2T的磁场下进行磁场取向成型，再置于冷等静压机中在300MPa的压力下进行冷等静压后,置于温度设置为700℃真空烧结炉中进行烧结1h得到坯体，之后在在450℃下对坯体再次进行30min的热处理，接着通过电镀工艺在坯体表面上镀钛镉合金，最后使用静电喷枪内装有环氧树脂粉末喷涂在电镀后的坯体表面，使喷涂后的环氧树脂固化的厚度为0.2mm，得到稀土永磁体。
本发明中制备方法通过在汝铁硼合金中加入具有高耐温性的碳、镍、铬和钴进行混合、粉碎、磁场取向压型、烧结、回火处理后形成坯体，最终对坯体进行电镀钛镉合金和喷涂环氧树脂，镉合金和环氧树脂具有高强度、耐高温和耐腐蚀性，提高稀土永磁体的热稳定性。
需要说明的是，在本文中，诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来，而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。
虽然在上文中已经参考实施例对本发明进行了描述，然而在不脱离本发明的范围的情况下，可以对其进行各种改进并且可以用等效物替换其中的部件。尤其是，只要不存在结构冲突，本发明所披露的实施例中的各项特征均可通过任意方式相互结合起来使用，在本说明书中未对这些组合的情况进行穷举性的描述仅仅是出于省略篇幅和节约资源的考虑。因此，本发明并不局限于文中公开的特定实施例，而是包括落入权利要求的范围内的所有技术方案。

Claims (6)

1.一种稀土永磁体的制备方法，其特征在于，包括如下步骤：
S1：配料：准备汝铁硼合金粉末、碳粉、镍粉、铬粉和钴粉进行充分混合，得到第一混合料；
S2：粉碎：将所述第一混合料置于气流粉碎机中进行粉碎，得到第二混合物；
S3：磁场取向压型：将所述第二混合物在1.7-2.2T的磁场下进行磁场取向成型，再置于冷等静压机中在200-300MPa的压力下进行冷等静压；
S4：烧结：在真空烧结炉中进行烧结得到坯体；
S5：回火处理：将坯体进行回火处理；
S6：电镀：将回火处理后的坯体通过电镀工艺在坯体表面上镀钛镉合金；
S7：静电喷涂：将静电喷枪内装有环氧树脂粉末喷涂在电镀后的坯体表面，得到稀土永磁体。
2.根据权利要求1所述的一种稀土永磁体的制备方法，其特征在于：所述配料的质量份数为：汝铁硼合金粉末80-100份，碳粉5-10份、镍粉10-15份、铬粉10-20份。
3.根据权利要求1所述的一种稀土永磁体的制备方法，其特征在于：所述第二混合物的平均粒径为2-5μm。
4.根据权利要求1所述的一种稀土永磁体的制备方法，其特征在于：所述烧结的温度为600-700℃，所述烧结的时间为1-3h。
5.根据权利要求1所述的一种稀土永磁体的制备方法，其特征在于：所述回火处理具体为在300-450℃下再次进行30min-80min的热处理。
6.根据权利要求1所述的一种稀土永磁体的制备方法，其特征在于。所述环氧树脂粉末喷涂后固化的厚度为0.15-0.2mm。
CN202110094957.7A 2021-01-25 2021-01-25 一种稀土永磁体的制备方法 Withdrawn CN112908674A (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110094957.7A CN112908674A (zh) 2021-01-25 2021-01-25 一种稀土永磁体的制备方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110094957.7A CN112908674A (zh) 2021-01-25 2021-01-25 一种稀土永磁体的制备方法

Publications (1)

Publication Number Publication Date
CN112908674A true CN112908674A (zh) 2021-06-04

Family

ID=76117515

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110094957.7A Withdrawn CN112908674A (zh) 2021-01-25 2021-01-25 一种稀土永磁体的制备方法

Country Status (1)

Country Link
CN (1) CN112908674A (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116479487A (zh) * 2023-06-07 2023-07-25 宁波科宁达工业有限公司 电镀磁体和电镀磁体的制备方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116479487A (zh) * 2023-06-07 2023-07-25 宁波科宁达工业有限公司 电镀磁体和电镀磁体的制备方法

Similar Documents

Publication Publication Date Title
CN102568738B (zh) 高机械强度烧结钕铁硼永磁体的制造方法
CN104752049A (zh) 用于制备稀土磁体的方法
CN101342591B (zh) 粉末冶金含氮不锈钢零件的制备方法
KR101499297B1 (ko) 고온성형에 의한 고투자율 비정질 압분자심코아 및 그 제조방법
CN109285685B (zh) 一种高磁导率气雾化铁硅铝磁粉芯的制备方法
CN101834045B (zh) 含钇的钕铁硼永磁材料及制造方法
CN108630368B (zh) 一种高矫顽力钕铁硼磁体的表面涂覆浆料及钕铁硼磁体制备方法
CN102456458A (zh) 高耐蚀性烧结钕铁硼磁体及其制备方法
US11495376B2 (en) Rare earth-bonded magnetic powder and preparation method therefor, and bonded magnet
CN111341512B (zh) 一种高性价比稀土永磁体及制备方法
EP3196897B1 (en) Magnetic core and method for manufacturing same
CN110136946B (zh) 一种耐腐蚀的钕铁硼磁体的制备方法
EP3667685A1 (en) Heat-resistant neodymium iron boron magnet and preparation method therefor
CN112908674A (zh) 一种稀土永磁体的制备方法
CN108998674B (zh) 一种铝镍钴永磁合金废料回收再利用的方法
CN108597709B (zh) 一种耐腐蚀烧结钕铁硼的制备方法
CN103187168A (zh) 一种超强耐腐蚀性钕铁硼磁体的制备方法
CN104575919A (zh) 一种烧结钕铁硼磁体及其制造方法
CN112712986B (zh) 一种低温度系数Sm2Co17型烧结磁体及其制备方法
CN108335818B (zh) 一种各向异性粘结永磁材料及其制造方法
CN111210962A (zh) 一种含SmFeN或SmFeC的烧结钕铁硼及其制备方法
CN107424696B (zh) 一种钕铁硼永磁材料及其制备方法
CN113380527B (zh) 增韧脱模剂的制备方法及其在制备烧结钕铁硼中的应用
KR100344010B1 (ko) 고주파 특성이 우수한 비정질 합금 분말 코아 및 그 제조방법
CN112447350B (zh) 一种稀土永磁体及其制备方法

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
WW01 Invention patent application withdrawn after publication
WW01 Invention patent application withdrawn after publication

Application publication date: 20210604