CN114645173B - 一种高强FeCoV-Nb-W软磁合金及其热处理方法 - Google Patents

一种高强FeCoV-Nb-W软磁合金及其热处理方法 Download PDF

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CN114645173B
CN114645173B CN202011506333.3A CN202011506333A CN114645173B CN 114645173 B CN114645173 B CN 114645173B CN 202011506333 A CN202011506333 A CN 202011506333A CN 114645173 B CN114645173 B CN 114645173B
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孙学银
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Abstract

一种高强FeCoV‑Nb‑W软磁合金及其热处理方法。本发明属于软磁合金材料领域。本发明为解决现有铁钴软磁合金在具有优异磁性能的同时无法同时获得高强度的技术问题。本发明的一种高强FeCoV‑Nb‑W软磁合金按质量分数由Fe：40％～55％、Co：40％～60％、V：0.5％～3％、Nb：0％～1％、W：0％～1％、Si：0％～0.3％和Mn：0％～0.3％组成。热处理方法：一、在还原性气体的氛围中于720℃～920℃下热处理，水冷；二、在防氧化气体的氛围中于200℃～400℃下热处理，空冷。本发明通过对元素进行选择，同时对所选元素的含量进行搭配，再通过特定的热处理方法，使得合金不仅强度得到大幅提高，塑性得到较好改善，还具有优异的磁性能，同时优化热处理工艺，减少工艺流程，降低能源损耗。

Description

一种高强FeCoV-Nb-W软磁合金及其热处理方法
技术领域
本发明属于软磁合金材料领域，具体涉及一种高强FeCoV-Nb-W软磁合金及其热处理方法。
背景技术
磁浮轴承转速极高，在高速运转下，对转子材料提出了更高的要求，其磁性和强度是决定磁浮轴承能否稳定运转的关键，因此对于转子材料的研究，要能够在工程应用的标准技术要求上达到尽可能更高的性能指标。
铁钴软磁合金因其具有高居里温度，高饱和磁感应强度以及低矫顽力的特点而在转子材料领域得到广泛应用，但目前该类合金与工程应用仍有很大距离，由于合金在具有优异磁性能的时候无法同时获得高强度，是目前研究遇到的主要问题。
发明内容
本发明为解决现有铁钴软磁合金在具有优异磁性能的同时无法同时获得高强度的技术问题，而提供了一种高强FeCoV-Nb-W软磁合金及其热处理方法。
本发明的一种高强FeCoV-Nb-W软磁合金按质量分数由Fe：40％～55％、Co：40％～60％、V：0.5％～3％、Nb：0％～1％、W：0％～1％、Si：0％～0.3％和Mn：0％～0.3％组成。
进一步限定，所述软磁合金为冷轧得到的厚度为0.1mm～0.5mm的带材。
进一步限定，所述软磁合金为冷轧得到的厚度为0.35mm的带材。
进一步限定，所述软磁合金按质量分数由Fe：48.5％、Co：48.5％、V：2％、Nb：0.3％、W：0.4％、Si：0.2％和Mn：0.1％组成。
本发明的一种高强FeCoV-Nb-W软磁合金的热处理方法按以下步骤进行：
一、在还原性气体的氛围中，将合金于720℃～920℃下保温10min～240min，取出放在冷却水中进行冷却；
二、在防氧化气体的氛围中，将步骤一处理后的合金于200℃～400℃下保温1h-100h，取出后进行空冷，即完成软磁合金的热处理方法。
进一步限定，步骤一中所述的还原性气体为氢气和氩气的混合气，混合气中氢气体积分数为3％～10％。
进一步限定，步骤一中所述混合气中氢气体积分数为5％。
进一步限定，步骤一中将合金于800℃下保温60min。
进一步限定，步骤一中所述冷却水的温度≤25℃。
进一步限定，步骤一中所述冷却水的温度为15℃。
进一步限定，步骤二中所述防氧化气体为纯氩气。
进一步限定，步骤二中于300℃下保温5h。
进一步限定，步骤二中空冷至室温。
本发明与现有技术相比具有的显著效果，具体如下：
本发明通过对元素进行选择，同时对所选元素的含量进行搭配，得到FeCoV-Nb-W合金，再通过特定的热处理方法，使得合金不仅强度得到大幅提高，塑性得到较好改善，还具有优异的磁性能，同时优化热处理工艺，减少工艺流程，降低能源损耗。
具体实施方式
实施例1：本实施例的一种高强FeCoV-Nb-W软磁合金按质量分数由Fe：48.5％、Co：48.5％、V：2％、Nb：0.3％、W：0.4％、Si：0.2％和Mn：0.1％组成，所述软磁合金为冷轧得到的厚度为0.35mm的带材。
实施例2：对实施例1所述的高强FeCoV-Nb-W软磁合金进行热处理的方法按以下步骤进行：
一、在还原性气体的氛围中，将合金于800℃下保温60min，取出放在15℃的冷却水中进行冷却；所述还原性气体为氢气和氩气的混合气，混合气中氢气体积分数为5％；
二、在纯氩气的氛围中，将步骤一处理后的合金于300℃下保温5h，取出后进行空冷至室温，即完成软磁合金的热处理方法。
对实施例2热处理后的合金进行力学性能检测，结果：实施例2热处理后的合金的屈服强度σ0.2为796MPa，抗拉强度σb为1108MPa，延伸率ε为8.19％。力学性能优异。
对实施例2热处理后的合金进行磁性能检测，结果：实施例2热处理后的合金的矫顽力Hc为253A/m，磁感应强度B8000为2.01T。磁性能优异。

Claims (6)

1.一种高强FeCoV-Nb-W软磁合金，其特征在于，所述软磁合金按质量分数由Fe：48.5%、Co：48.5 %、V：2 %、Nb：0.3 %、W：0.4 %、Si：0.2 %和Mn：0.1 %组成；
所述软磁合金的热处理方法，按以下步骤进行：
一、在还原性气体的氛围中，将合金于800℃下保温60 min，取出放在冷却水中进行冷却；
二、在防氧化气体的氛围中，将步骤一处理后的合金于300℃下保温5 h，取出后进行空冷，即完成软磁合金的热处理方法。
2.根据权利要求1所述的一种高强FeCoV-Nb-W软磁合金，其特征在于，所述软磁合金为冷轧得到的厚度为0.1 mm~0.5 mm的带材。
3.根据权利要求1所述的一种高强FeCoV-Nb-W软磁合金，其特征在于，步骤一中所述的还原性气体为氢气和氩气的混合气，混合气中氢气体积分数为3 %~10 %。
4.根据权利要求1所述的一种高强FeCoV-Nb-W软磁合金，其特征在于，步骤一中所述冷却水的温度≤25℃。
5.根据权利要求1所述的一种高强FeCoV-Nb-W软磁合金，其特征在于，步骤二中所述防氧化气体为纯氩气。
6.根据权利要求1所述的一种高强FeCoV-Nb-W软磁合金，其特征在于，步骤二中空冷至室温。
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US5501747A (en) * 1995-05-12 1996-03-26 Crs Holdings, Inc. High strength iron-cobalt-vanadium alloy article
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