Modelling the Variation of Tensile Properties of High-Silicon Ductile Iron
Artikel i vetenskaplig tidskrift, 2018

For an optimized gating system, the influence of chemical composition can be controlled to a greater extent than in non-optimized conditions, where hidden mechanisms prevail. In this work, GJS-600-10 (EN 1563:2012) solid-solution-strengthened ferritic spheroidal graphite iron with advantageous machinability due to uniform hardness, has been used to elucidate interaction effects and create a material regression model to predict the tensile properties. In this case, key predictors are related to the tensile properties (Rp0,2, Rm, A), of over 120 industrial tensile specimens from 10 years of research. A partial least square (PLS) regression reveals that elements in the steel scrap strongly affect elongation, yield strength and ultimate tensile strength. The analysis reveals that strength to a great extent can be predicted by the chemical composition whereas ductility also depends on other factors.

solid solution strengthened ferritic spheroidal graphite iron

tensile properties

gating system

solution hardening

high silicon

ductile iron

Författare

Peter Hammersberg

Chalmers, Industri- och materialvetenskap, Konstruktionsmaterial

Kenneth Hamberg

Chalmers, Industri- och materialvetenskap, Konstruktionsmaterial

Henrik Borgström

RISE SWECAST AB

Joachim Lindkvist

Volvo Group

Lars Erik Björkegren

LEB Casting Technology

2018 AFS Transactions, American Foundry Society

Vol. 126 155-164 18-040

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2018-11-30