P005 Investigation on Applicable Condition of Fracture Splitting Method for Wear Resistant Aluminum Alloy Connecting Rod

The fracture splitting method is being increasingly used for manufacturing connecting rods that are made of the powder forging material, high-carbon steel, etc., which are comparatively easy to fracture, in order to improve the accuracy and productivity. In this paper, a microalloyed high carbon steel used for fracture splitting connecting rod is developed by the process “EAF-EBT-LF-CC-CR”. The steel microstructure, nonmetallic inclusions, precipitated phases, mechanical property and fracture surfaces are investigated by microscope, SEM and TEM. The results show that the steel is constituted of pearlite and a small mount of ferrite, the nonmetallic inclusions in the steel include MnS, Al-rich (taken to be Al2O3) and Al-Ca-rich (taken to be CaO-Al2O3) particles. The precipitations mainly are VC, VN, (Mn, Cu)S, etc. these precipitations are beneficial to fine the pearlite group, short lamellar spacing of pearlite and improve the strengthening of the microalloyed high carbon steel. The tensile tests indicate that the microalloyed high carbon steel has high yield strength, ultimate tensile strength (UTS), but low elongation and contraction of area. It is required for heavier loads, higher performance of automobile engine and less distortion on fracture splitting. The fracture surface of connecting rod shows distinct brittle fracture character and it is beneficial to improve fracture splitting performance.

Download Full-text

Development of Machined Notch for Fracture Splitting Method in Forged Connecting Rod

Journal of the Japan Society for Precision Engineering ◽

10.2493/jjspe.76.643 ◽

2010 ◽

Vol 76 (6) ◽

pp. 643-647

Author(s):

Hiroichi HASE ◽

Eitoku NAKANISHI ◽

Shigeo KOTAKE ◽

Yasuyuki SUZUKI

Keyword(s):

Splitting Method ◽

Connecting Rod ◽

Fracture Splitting

Download Full-text

Austenite grain growth behavior and its effects on fracture splitting performance of 36MnVS4 connecting rod for automobile engine

Metallic Materials ◽

10.4149/km_2018_2_113 ◽

2018 ◽

Vol 56 (02) ◽

pp. 113-120 ◽

Cited By ~ 1

Author(s):

Y. Ji ◽

X. Sun ◽

F. Zhao ◽

C. Zhang ◽

B. Jiang ◽

...

Keyword(s):

Grain Growth ◽

Growth Behavior ◽

Connecting Rod ◽

Automobile Engine ◽

Austenite Grain ◽

Fracture Splitting ◽

Grain Growth Behavior ◽

Austenite Grain Growth

Download Full-text

Tests of tubing made of aluminum alloy 1953T1 with wear-resistant thread-lined coats

VESTNIK of the Samara State Aerospace University ◽

10.18287/1998-6629-2013-0-2(40)-98-102 ◽

2014 ◽

pp. 98

Author(s):

A. V. Ivanova

Keyword(s):

Aluminum Alloy ◽

Wear Resistant

Download Full-text

Study on Machining of Cracking Notches for Automotive Connecting Rod Using WEDM

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.447-448.228 ◽

2010 ◽

Vol 447-448 ◽

pp. 228-232

Author(s):

Yong Jun Tang ◽

Yuan Bo Li ◽

Yong Jun Zhang ◽

Chun Qiang Zhou

Keyword(s):

Cutting Speed ◽

Connecting Rod ◽

Electric Discharge Machine ◽

Fracture Splitting ◽

Discharge Machine ◽

Wire Electric Discharge Machine ◽

The Cost ◽

The Relationship ◽

In Virtue Of ◽

Splitting Process

In order to resolve the problem of connecting rod notches machining, a new process of WEDM (Wire Electric Discharge Machine) has been presented, and it is greatly possible that expensive laser process can be replaced by WEDM in virtue of its unique advantages. Firstly, process parameters of notch have been analyzed, and project of machining notch using WEDM has been introduced, including measures to achieve good-quality notch. The relationship between cutting speed and power supply parameters has been investigated, and it is discovered that micro-crackle on bottom of notch are greatly effect to fracture splitting process, also new idea of active controlling micro-crackle has been presented. Finally, fracture splitting machining has been carried out. The cost and entrance standard of fracture splitting process are greatly dropped owing to new breakthrough of machining notch using WEDM.

Download Full-text