A kind of alloy structural steel suitable for high-strength transmission shaft
A technology of alloy structural steel and transmission shaft, applied in the field of alloy steel, can solve the problems of fatigue performance decline, etc., and achieve the effects of high cleanliness, high toughness, and high bending fatigue strength
Active Publication Date: 2020-08-21
CENT IRON & STEEL RES INST
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
In addition, large-sized oxide inclusions in high-strength steels often act as fatigue crack sources, resulting in reduced fatigue performance (Yan Liu, Maoqiu Wang, Jie Shi, et al. Fatigue properties of two case hardening steels after carburization. International Journal of Fatigue, 2009,31(2):292-299), so the control of large-size inclusions is an important way to improve the fatigue performance of high-strength steel
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
[0031] Material preparation: According to the above-designed chemical composition range, the steel of the present invention (furnace) produced by electric furnace (EAF) + refining (LF+VD) smelting + pouring electrode + protective atmosphere electroslag remelting + forging / rolling + annealing process No. 1-5) and 2 furnaces of comparative steel (heat number 6-7), the specific chemical composition is shown in Table 1. Sampling (and heat treatment) on the φ100mm round bar test material is used to determine inclusions, microstructure, mechanical properties and fatigue properties.
[0032] Tensile and impact properties: After rough machining the bar with a diameter of φ20mm, it is austenitized at 880±20℃×30 minutes, oil quenched, then tempered at 200±20℃ for 2 hours, air cooled, and then again Processed into standard room temperature tensile specimens (L 0 = 5d 0 , D 0 =5mm) and Charpy U-shaped impact samples (10mm×10mm×55mm), and carry out corresponding tests according to the nationa...
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 |
|---|---|---|
| tensile strength | aaaaa | aaaaa |
| tensile strength | aaaaa | aaaaa |
| tensile strength | aaaaa | aaaaa |
Login to View More
Abstract
The invention discloses an alloy structural steel suitable for being used as a high-strength transmission shaft, and belongs to the technical field of alloy steel. The alloy structural steel comprisesthe following chemical components of, by weight, 0.22-0.28% of C, 0.10-0.30% of Si, 0.50-0.80% of Mn, less than or equal to 0.005 of P, less than or equal to 0.002 of S, 0.80-1.60% of Cr, 1.50-2.50%of Ni, 0.15-0.35% of Mo, 0.10-0.25% of V, less than or equal to 0.10 of Nb, less than or equal to 0.0020 of [ O ], less than or equal to 0.0002 of [ H ], less than or equal to 0.0050 of [ N ], 0.0010-0.0035 of Re, and the balance Fe and inevitable impurities; and the alloy structural steel is characterized in that the level of DS inclusion is less than or equal to level 1, the size of a martensiteplate strip is less than or equal to 5 microns, the tensile strength is 1500-1700 MPa, the impact absorption energy KU2 is larger than or equal to 78 J, the bending fatigue strength sigma-1 is largerthan or equal to 750 MPa, and the torsional fatigue strength is tau-1 is larger than or equal to 380 MPa, wherein the fatigue performance strength is improved by 20% or above compared with that of common transmission shafts such as 18Cr2Ni4WA. The alloy structural steel has the advantages of high cleanliness, ultrafine structure, high strength, high toughness, high bending fatigue strength, hightorsional strength and the like.
Description
Technical field [0001] The invention belongs to the technical field of alloy steel, and particularly relates to an alloy structural steel suitable for use as a high-strength transmission shaft. Background technique [0002] The drive shaft is one of the most common basic parts in various mechanical structures, and is often made of alloy structural steel. Commonly used alloy structural steels are 40Cr, 42CrMo, etc., when used as a drive shaft, its tensile strength is lower than 1000MPa, and high-strength drive shafts higher than 1000MPa are usually made of alloy structural steels with higher alloy content, such as 18Cr2Ni4WA steel. [0003] 18Cr2Ni4WA steel is a steel introduced from the former Soviet Union in the 1950s. When used as a drive shaft, its tensile strength Rm≥1180MPa (GB / T3077 alloy structural steel), but it is difficult to exceed 1300MPa. Since the latest development of the transmission device requires higher power density, the transmission shaft is required to be hig...
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): C22C38/02C22C38/04C22C38/44C22C38/46C22C38/48
Inventor 王毛球时捷何肖飞尉文超李晓源徐乐闫永明孙挺
Owner CENT IRON & STEEL RES INST