Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

High strength non-quenched and tempered free machining steel for automobile connecting bar and technological process thereof

A technology of free-cutting steel and automobile connecting rod, which is applied in the field of high-strength non-quenched and tempered free-cutting steel, can solve problems such as unsatisfactory technical conditions, and achieve the effect of simple production process

Inactive Publication Date: 2012-05-09
武钢集团有限公司
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the technical conditions of some important auto parts cannot be met

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Steel A of the present invention contains C: 0.33%, Si: 0.60%, Mn: 0.95%, P: 0.010%, S: 0.035%, Cr: 0.20%, V: 0.22%, N: 0.011%, Al: 0.030% , the rest are iron and unavoidable impurities; continuous casting slab heating temperature: 1200°C, heating time 160min, starting rolling temperature: 1100°C, finishing rolling temperature: 900°C, reduction: 16; post-rolling cooling rate: 40°C / min, put into the pit to cool slowly after bundling. The grain size of the hot-rolled material is 9.0, the proportion of pearlite is 80%, the interlamellar spacing of pearlite is 230nm, and the mechanical properties are: Rm: 1000MPa, Rel: 750MPa, A: 18%, Z: 30%.

Embodiment 2

[0049] Steel B of the present invention contains C: 0.36%, Si: 0.66%, Mn: 1.01%, P: 0.011%, S: 0.045%, Cr: 0.27%, V: 0.27%, N: 0.012%, Al: 0.035% , the rest is iron and unavoidable impurities; continuous casting slab heating temperature: 1250°C, heating time 160min, starting rolling temperature: 1120°C, finishing rolling temperature: 910°C, reduction: 16; cooling rate after rolling: 60°C / min, put into the pit to cool slowly after bundling. The grain size of the hot-rolled material is 9.5, the proportion of pearlite is 84%, the interlamellar spacing of pearlite is 200nm, and the mechanical properties are: Rm: 1050MPa, Rel: 770MPa, A: 16%, Z: 25%.

Embodiment 3

[0051] Steel C of the present invention contains C: 0.38%, Si: 0.60%, Mn: 1.00%, P: 0.010%, S: 0.040%, Cr: 0.25%, V: 0.25%, N: 0.013%, Al: 0.035% , the rest are iron and unavoidable impurities; continuous casting slab heating temperature: 1150°C, heating time 160min, starting rolling temperature: 1050°C, finishing rolling temperature: 850°C, reduction: 14; post-rolling cooling rate: 70°C / min, put into the pit to cool slowly after bundling. The grain size of the hot-rolled material is 9.5, the proportion of pearlite is 86%, the interlamellar spacing of pearlite is 170nm, and the mechanical properties are: Rm: 1100MPa, Rel: 790MPa, A: 16%, Z: 24%.

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

PropertyMeasurementUnit
elongationaaaaaaaaaa
tensile strengthaaaaaaaaaa
yield strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a high-intensity non-quenching and tempering easy-cutting steel used for a vehicle connection rod and a technical method thereof. The invention starts from the principle of improving the intensity of the non-quenching and tempering easy-cutting steel and leads the anti-tension intensity of the non-quenching and tempering easy-cutting steel containing 0.30 to 0.40 percent of carbon to be 1000MPa and the yield strength to be 750MPa by adjusting the components. The technical scheme of the invention is: the high-intensity non-quenching and tempering easy-cutting steel used for a vehicle connection rod consists of the elements of C, Si, Mn, Al, P, S, Cr, V, N and Fe; the weight percentages of the component elements are: 0.30 to 0.4 percent of C, 0. 50 to 0.70 percent of Si, 0.80 to 1.20 percent of Mn, equal to or less than 0.040 percent of P, 0.030 to 0.060 percent of S, 0.010 to 0.040 percent of Al, 0.10 to 0.40 percent of Cr, 0.10 to 0.30 percent of V, 010 to 0.015 percent of N and the rest is Fe and unavoidable impurities. The heating temperature of a continuous casting blank is 1200 DEG C; the heating time is 160min; the start rolling temperature is 1100 DEGC; the final rolling temperature is 900 DEG C; the pressing volume is 16; the cooling speed after rolling is 40 DEG C / min; after bundling, the components are thrown in a pit and slowly cooled.

Description

technical field [0001] The invention relates to a high-strength non-quenched and tempered free-cutting steel for automobile connecting rods and a process method thereof, in particular to a chemical composition and a production process of high-strength free-cutting steel used for producing automobile engine connecting rods. Background technique [0002] Before the present invention proposes, non-quenched and tempered free-cutting steel has been widely used in the automobile industry, and it is used to manufacture crankshafts, connecting rods, steering knuckles, front beams and other parts on automobiles that require strength and certain cutting performance. These parts used to be treated with medium carbon steel (carbon steel or alloy steel) through quenching and tempering (high temperature tempering after quenching). Since the oil crisis, all countries in the world have tried to save energy, and due to the development of metallurgical technology and steel thermal processing ...

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
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/24C21D8/00
Inventor 张贤忠王虎祥骆志平陈庆丰谈知良熊玉彰王国秋徐冠宇尹志香郭元奎马啟红
Owner 武钢集团有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com