Steel and manufacturing method for Ca microalloying free-cutting high-strength expansion-breaking connecting rod
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A technology of micro-alloying and expanding connecting rod, applied in the field of Ca micro-alloyed steel material and its manufacturing, can solve the problems of reduced material fatigue performance, material strength, difficult to solve the machinability and crackability and other problems
Inactive Publication Date: 2017-07-11
JIANGYIN XINGCHENG SPECIAL STEEL WORKS CO LTD
View PDF7 Cites 21 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
The machinability of this steel has been improved, but it is still difficult to solve the problem of machinability and cracking, and in order to improve the machinability of this steel, the amount of alloy addition is appropriately reduced, resulting in a decrease in material strength
And this steel type adds a relatively high content of Ti element, so that a large amount of harmful Ti-containing inclusions are formed in the steel, and the fatigue performance of the material is significantly reduced.
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 more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1-3
[0040] Manufacture the Ca microalloyed free-cutting high-strength bursting connecting rod steel in Examples 1-3 of the present invention according to the following procedures:
[0041] 1) Smelting: After smelting in a 100-ton steelmaking furnace, refining outside the furnace is carried out, and the molten steel is then subjected to vacuum degassing treatment, and the mass percentage of each chemical element is strictly controlled according to the requirements.
[0042] 2) Continuous casting: continuous casting into a billet of 200mm×200mm, and the superheating degree of the tundish is controlled at 10-40°C. In order to control the segregation of materials, advanced end electromagnetic stirring and continuous casting light reduction advanced equipment and technology are used in continuous casting. Gained continuous casting slab chemical composition percentage is shown in the following table 1:
[0043] Table 1. (wt.%, the balance is Fe and other unavoidable impurity elements) ...
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
elongation
aaaaa
aaaaa
Login to view more
Abstract
The invention relates to steel for a Ca microalloying free-cutting high-strength expansion-breaking connecting rod. The steel is prepared from, by mass percent, 0.25%-0.60% of C, 0.10%-1.20% of Si, 0.40%-1.50% of Mn, 0.05%-0.50% of Cr, 0.02%-0.15% of S, 0.02%-0.15% of P, 0.03%-0.55% of V, 0.0005%-0.0080% of Ca, 0.002%-0.035% of N, 0.002%-0.080% of Al, not larger than 0.02% of Ti and the balance Fe and inevitable impurity elements. The steel is subjected to smelting, continuous casting, heating, hot rolling and cooling, and the structure characteristic is uniform ferrite and pearlite. According to the steel, key elements in the steel are optimized, Ca microalloying is especially adopted, and the steel for the expansion-breaking connecting rod with high strength, good cutting machinability, good expansion-breaking performance and excellent comprehensive performance is obtained, and the design requirements for engine light weight, economical efficiency and driving comfort are met.
Description
technical field [0001] The invention relates to a Ca microalloyed steel material and a manufacturing method thereof, in particular to a free-cutting high-strength bursting connecting rod steel and a manufacturing method thereof. Background technique [0002] With the rapid development of the transportation industry. The proportion of high-strength, easy-to-cut expandable connecting rod steel used in automobile, ship and other vehicle engines continues to increase. Energy pressure requires higher strength in engine connecting rods for light weight and good cutting performance. The driving comfort requires good assembly performance of the engine connecting rod, and the expansion connecting rod has better assembly performance than the cut-off connecting rod. In order to meet the above requirements, inventing a Ca microalloyed free-cutting high-strength bursting connecting rod has broad market prospects. [0003] Application No. 201510612936.4 discloses a free-cutting medium-...
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
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more