High strength level non-quenched-tempered steel bar for manufacturing of engine rocker and manufacture method thereof

A non-quenched and tempered steel, engine technology, applied in the field of metallurgy, can solve the problems of heat treatment material consumption, unqualified performance, environmental pollution, etc.

Inactive Publication Date: 2019-08-30
JIANGYIN XINGCHENG SPECIAL STEEL WORKS CO LTD
View PDF7 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In this manufacturing process, due to the quenching and tempering treatment (quenching and tempering) of the parts, there are two problems that cannot be avoided; one is the quality problems (such as deformation, cracking, performance, etc.) of the parts during the heat treatment process. Unqualified); second, energy con

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
  • High strength level non-quenched-tempered steel bar for manufacturing of engine rocker and manufacture method thereof
  • High strength level non-quenched-tempered steel bar for manufacturing of engine rocker and manufacture method thereof
  • High strength level non-quenched-tempered steel bar for manufacturing of engine rocker and manufacture method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The high-strength level non-quenched and tempered steel round steel involved in this embodiment has a diameter of 36 mm, and its chemical composition and mass percentage are as follows: C: 0.46%, Si: 0.53%, Mn: 1.19%, P: 0.014%, S : 0.045%, Cr: 0.22%, Ni: 0.12%, Mo: 0.02%, Al: 0.005%, Ti: 0.002%, V: 0.16%, N: 0.015%, and the balance is Fe and unavoidable impurity elements.

[0051] The physical picture of the above round steel bar is as follows figure 1 Shown, the manufacture method of above-mentioned round steel bar is as follows:

[0052] Converter smelting-refining-vacuum degassing-continuous casting-continuous casting slab cooling-continuous casting slab heating-rolling-cooling-finishing-inspection-finished product storage.

[0053] More specifically: the smelting raw materials are smelted in a converter, after LF refining and vacuum degassing treatment, the arc continuous casting machine is used to continuously cast a rectangular continuous casting slab whose comp...

Embodiment 2

[0056] The high-strength level non-quenched and tempered steel round bar involved in this example has a diameter of 36mm, and its chemical composition and mass percentage are as follows: C: 0.44%, Si: 0.57%, Mn: 1.15%, P: 0.011 %, S: 0.053%, Cr: 0.20%, Ni: 0.11%, Mo: 0.02%, Al: 0.006%, Ti: 0.002%, V: 0.15%, N: 0.017%, the balance is Fe and unavoidable impurity elements.

[0057] The physical picture of the above round steel bar is as follows figure 1 Shown, the manufacture method of above-mentioned round steel bar is as follows:

[0058] Converter smelting-refining-vacuum degassing-continuous casting-continuous casting slab cooling-continuous casting slab heating-rolling-cooling-finishing-inspection-finished product storage.

[0059] More specifically: the smelting raw materials are smelted in a converter, after LF refining and vacuum degassing treatment, the arc continuous casting machine is used to continuously cast a rectangular continuous casting slab whose composition m...

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
Yield strengthaaaaaaaaaa
Tensile strengthaaaaaaaaaa
Yield strengthaaaaaaaaaa
Login to view more

Abstract

The invention relates to a high strength level non-quenched-tempered steel bar for manufacturing of an engine rocker. The high strength level non-quenched-tempered steel bar for the manufacturing of the engine rocker consists of chemical components of 0.42-0.49% of C, 0.40-0.80% of Si, 0.80-1.50% of Mn, P<=0.040%, 0.035-0.075% of S, 0.10-0.30% of Cr, 0.01-0.25% of Ni, Mo<=0.08%, Al<=0.015%, Ti<0.010%, 0.13-0.20% of V, 0.012-0.022% of N, and the balance being Fe and unavoidable impurity elements. The product is of hot rolling round steel bar form. After the steel bar is forged into the rocker and cooled in air, a rocker forging can achieve following mechanical properties: yield strength>=800MPa, tensile strength>=1000MPa, ductility>=12%, area reduction rate>=38% and harness>=290HB. The metallographic structure of the rocker forging is tiny ferrite and pearlite structure. MnS inclusions and composite inclusions thereof are distributed in the metallographic structure. The high strength level non-quenched-tempered steel bar is a non-quenched-tempered medium carbon round steel high in hardness, easy to cut, and high in surface quality, and completely meets forging requirements of the engine rocker.

Description

technical field [0001] The invention belongs to the field of metallurgy, in particular to a high-strength non-quenched and tempered round steel. Background technique [0002] Most of the raw materials traditionally used to make engine rocker arms are 45 steel, 40Cr, 42CrMo and other alloy structural steels. After forging such alloy structural steel bars into engine rocker arm rough forgings, they must be quenched and tempered. In order to make the mechanical properties of the parts meet the requirements of use. When high-strength rocker arms are to be manufactured, the traditional alloy structural steels such as 40Cr and 42CrMo may sometimes have unqualified performance after quenching and tempering heat treatment. [0003] The main process flow of using alloy structural steel to manufacture engine rocker arm is: [0004] Raw material cutting-heating-forging-cooling-machining-quenching and tempering heat treatment-subsequent processing. [0005] In this manufacturing proc...

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
IPC IPC(8): C22C38/02C22C38/04C22C38/44C22C38/46C22C38/60C21D8/06
CPCC21D8/065C21D2211/005C21D2211/009C22C38/001C22C38/02C22C38/04C22C38/44C22C38/46C22C38/60
Inventor 王新社许晓红白云黄镇张磊李冰孙艺凡董娟
Owner JIANGYIN XINGCHENG SPECIAL STEEL WORKS CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap