A kind of hot-rolled magnetic yoke steel and its manufacturing method
A manufacturing method and technology of yoke steel, which are applied in the field of hot-rolled yoke steel and its manufacture, can solve the problems of low yield strength of yoke steel
Active Publication Date: 2021-01-12
BAOSHAN IRON & STEEL CO LTD
View PDF11 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, the yield strength of the hot-rolled high-strength yoke steel disclosed in this patent document is relatively low, only at the level of 700 MPa, and the magnetic induction performance is B 50 ≥1.5T
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1-5
[0050] Table 1 lists the mass percentages of various chemical elements in the hot-rolled yoke steels of Examples 1-5.
[0051] Table 1. (wt%, the balance is Fe and other unavoidable impurity elements except P and S)
[0052]
[0053] The manufacturing method of the hot-rolled yoke steel of embodiment 1-5 comprises the steps:
[0054] (1) Smelting, refining and casting according to the chemical element composition listed in Table 1;
[0055] (2) Reheating: heating temperature ≥ 1230 ℃, holding time ≥ 1h;
[0056] (3) Hot rolling: control the finish temperature of rough rolling at 1000-1100°C, and roll at 1050°C or higher for multiple passes with large reduction and cumulative deformation ≥ 50%, and then wait for the intermediate billet to reach 900-1000°C, and Multi-pass rolling is carried out and the cumulative deformation of the multi-pass rolling is ≥70%; the final rolling temperature is controlled between 830 and 920°C;
[0057] (4) Laminar cooling;
[0058] (5) Coil...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| yield strength | aaaaa | aaaaa |
| tensile strength | aaaaa | aaaaa |
| yield strength | aaaaa | aaaaa |
Login to View More
Abstract
The invention discloses hot-rolled magnetic yoke steel. The chemical elements of the hot-rolled magnetic yoke steel comprise, by mass, 0.06%-0.18% of C, larger than 0% and smaller than or equal to 0.50% of Si, 1.50%-2.20% of Mn, 0.10%-0.25% of Ti, 0.10%-0.50% of Mo, 0.05%-0.22% of V, larger than or equal to 0.05% and smaller than or equal to 0.30% of Cu, larger than or equal to 0.05% and smaller than or equal to 0.30% of Ni, 0.015%-0.10% of Al, smaller than or equal to 0.010% of N, the balance Fe and other unavoidable impurities. In addition, the invention discloses a manufacture method of thehot-rolled magnetic yoke steel. The manufacture method comprises the steps of (1) smelting, refining and casting; (2) reheating, specifically, the heating temperature is higher than or equal to 1,230DEG C, and the heat preservation time is longer than or equal to 1 h; (3) hot rolling; (4) laminar cooling; and (5) rolling, specifically, the rolling temperature ranges from 520 DEG C to 620 DEG C,and then the temperature is lowered to the room temperature through slow cooling. The hot-rolled magnetic yoke steel is high in strength, good in tenacity and excellent in magnetic induction performance.
Description
technical field [0001] The invention relates to a magnetic yoke steel and a manufacturing method thereof, in particular to a hot-rolled magnetic yoke steel and a manufacturing method thereof. Background technique [0002] Hydropower resource is a kind of renewable and clean energy, and it is of great significance to vigorously develop hydropower development. However, these large-scale hydropower projects all require large-scale hydro-generator units with a single-unit capacity of one million kilowatts, which puts forward stricter requirements on the comprehensive performance of the steel used for the rotor yoke of the hydro-generator. [0003] At present, existing patent documents disclose hot-rolled high-strength magnetic yoke steel and its manufacturing method. For example: the publication number is CN101016600, the publication date is August 15, 2007, and the Chinese patent document titled "C-Mn-Ti-Nb series hot-rolled high-strength high-magnetic-inductive performance st...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/04C22C38/02C22C38/14C22C38/12C22C38/16C22C38/08C22C38/06C21D8/12
CPCC21D8/1222C21D2211/002C21D2211/004C21D2211/005C22C38/02C22C38/04C22C38/06C22C38/08C22C38/12C22C38/14C22C38/16
Inventor 胡晓萍张晨陆敏王焕荣王巍杨征华骏山
Owner BAOSHAN IRON & STEEL CO LTD