钛含量对无取向电工钢组织和磁性能的影响

李景才; 辛燕

doi:10.7513/j.issn.1004-7638.2021.04.026

钛含量对无取向电工钢组织和磁性能的影响

doi: 10.7513/j.issn.1004-7638.2021.04.026

李景才,
辛燕

商丘职业技术学院机电工程系，河南商丘 476000

详细信息

作者简介:
李景才（1982−），男，汉族，讲师，主要研究方向：材料研发及机械制造，E-mail：411785183@qq.com

中图分类号: TF823, TG142.1
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- PDF下载量: 37
- 被引次数: 0
出版历程
- 收稿日期: 2021-01-10
- 刊出日期: 2021-08-10

Effect of Ti on microstructure and magnetic properties of non-oriented electrical steel

Li Jingcai,
Xin Yan

Department of Mechanical and Electrical Engineering, Shangqiu Vocational and Technical College, Shangqiu 476000, Henan, China

摘要

摘要: 以实验室冶炼的不同钛含量的无取向电工钢为原材料，采用退火炉、透射电镜、金相组织观察和磁性能测试等手段就钛含量对无取向电工钢组织和性能的影响进行了研究。结果表明：试样的晶粒尺寸随其钛含量增加而减小，当钛含量小于0.015%时，试样的晶粒组织呈等轴状，均匀性较高，其中的钛以碳氮化物形式析出，且钉扎于组织的晶界处；随着钛含量提高至0.015%以上，其组织中的晶粒形变明显，钛以铁-钛磷化物形式析出于晶内和晶界上。添加微量的钛（ ≤0.015%）可改善电工钢的磁感应强度和铁损，铁损W_15/50约4.6～5.2 W/kg，磁感应强度B₅₀约1.74～1.76 T，但需严格避免钛含量的过量添加。
- 无取向电工钢 /
- 钛元素 /
- 磁感应强度 /
- 铁损
Abstract: In this paper, the effect of titanium content on the microstructure and properties of non oriented electrical steel with different titanium content was studied by means of annealing furnace, transmission electron microscope, metallographic observation and magnetic property test. The results showed that the grain size of electrical steel decreased with the increase of titanium content. When the content of titanium was less than 0.015%, the grain was equiaxed with a higher uniformity. The titanium precipitated in the form of carbonitride and was pinned at the grain boundary of the structure. With the increase of Ti content to more than 0.015%, the grains in the microstructure were obviously deformed, and Ti precipitated out of the grain boundary and in the grain boundary by Fe-Ti phosphide. The magnetic induction and iron loss of electrical steel could be slightly improved by adding a small amount of titanium ( ≤ 0.015%). The iron loss W_{15 / 50} was about 4.6～5.2 W/kg, and the magnetic induction B₅₀ was about 1.74～1.76 T. However, excessive addition of titanium should be strictly avoided.
- non-oriented electrical steel /
- titanium element /
- magnetic induction /
- iron loss

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图 1 热处理连续退火工艺

Figure 1. Continuous annealing parameters of heat treatment

下载: 全尺寸图片幻灯片

图 2 试验钢经退火后的金相组织

Figure 2. Microstructure of tested steels after annealing

下载: 全尺寸图片幻灯片

图 3 试样退火后的透射电镜形貌

(a)试样1^#；(b)试样5^#；(c)试样9^#

Figure 3. TEM images of Ti bearing steels after annealing

下载: 全尺寸图片幻灯片

图 4 铁损W_15/50与钛含量的关系曲线

Figure 4. Relationship between iron loss W_15/50 and titanium content

下载: 全尺寸图片幻灯片

图 5 磁感强度B₅₀与钛含量的关系曲线

Figure 5. Relationship between the intensity of magnetic induction B₅₀ and the content of titanium

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图 6 各试样退火前的微观组织

Figure 6. Microstructure of individual steels before annealing

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图 7 退火前试样反极图强度与钛含量的关系

Figure 7. Relationship between strength of reverse pole diagram and titanium content in steels before annealing

下载: 全尺寸图片幻灯片

图 8 退火后试样反极图织构强度与钛含量的关系

Figure 8. Relationship between strength of reverse pole diagram and titanium content in steels after annealing

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表 1 试验钢的主要化学成分

Table 1. Main chemical compositions of tested steels %

	C	Si	Mn	P	S	Als	Ti	N	O
1^#	<0.0010	0.30	0.29	0.100	0.0042	0.27	≤0.001	0.0013	0.0032
2^#	<0.0010	0.32	0.30	0.098	0.0041	0.28	0.002	0.0015	0.0018
3^#	<0.0010	0.33	0.28	0.098	0.0045	0.26	0.004	0.0013	0.0010
4^#	<0.0010	0.32	0.30	0.097	0.0042	0.26	0.005	0.0013	0.0024
5^#	<0.0010	0.32	0.29	0.098	0.0042	0.27	0.009	0.0014	0.0022
6^#	<0.0010	0.28	0.29	0.098	0.0044	0.27	0.015	0.0013	0.0011
7^#	<0.0010	0.29	0.28	0.100	0.0042	0.26	0.042	0.0012	0.0026
8^#	<0.0010	0.32	0.30	0.098	0.0045	0.28	0.072	0.0013	0.0032
9^#	<0.0010	0.29	0.29	0.097	0.0042	0.27	0.118	0.0011	0.0012

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