Effects of forming route and heat treatment on the distortion behaviour of case-hardened martensitic steel type S156

Research output: Contribution to conferencePaper

1 Citation (Scopus)

Abstract

The distortion behaviour of carburised and fully heat treated Ni-Cr-Mo martensitic steel (S156) has been experimentally evaluated. Dimensional measurements of Navy c-ring distortion coupons during interrupted heat treatment process for parts manufactured from two forming routes, hot forging and machined from as received bar, was performed. Metallurgical analysis was carried out to attempt to relate the observed microstructural characteristics with measured process induced distortion. The carburisation process was found to be the most severe in terms of inducing distortion. It was found that additional heat treatments during the process results in a larger final distortion. Machining parts from forgings results in higher distortions than that of those machined directly from as received bar due to the added thermal processing history. An FE simulation of the carburisation process for a c-ring coupon is presented.

Conference

ConferenceHeat Treat 2017
CountryUnited States
CityOhio
Period24/10/1726/10/17
Internet address

Fingerprint

Martensitic steel
Heat treatment
Forgings
Forging
Machining

Keywords

  • heat treatment
  • distortion behaviour
  • steels
  • S156
  • c-ring distortion
  • c-ring coupon

Cite this

@conference{d173654a669249d785a0cc6e16e586c4,
title = "Effects of forming route and heat treatment on the distortion behaviour of case-hardened martensitic steel type S156",
abstract = "The distortion behaviour of carburised and fully heat treated Ni-Cr-Mo martensitic steel (S156) has been experimentally evaluated. Dimensional measurements of Navy c-ring distortion coupons during interrupted heat treatment process for parts manufactured from two forming routes, hot forging and machined from as received bar, was performed. Metallurgical analysis was carried out to attempt to relate the observed microstructural characteristics with measured process induced distortion. The carburisation process was found to be the most severe in terms of inducing distortion. It was found that additional heat treatments during the process results in a larger final distortion. Machining parts from forgings results in higher distortions than that of those machined directly from as received bar due to the added thermal processing history. An FE simulation of the carburisation process for a c-ring coupon is presented.",
keywords = "heat treatment, distortion behaviour, steels, S156, c-ring distortion, c-ring coupon",
author = "David Easton and Marcos Perez and Jianglin Huang and Salah Rahimi",
year = "2017",
month = "10",
day = "24",
language = "English",
note = "Heat Treat 2017 : 29th Heat Treating Society Conference and Exposition ; Conference date: 24-10-2017 Through 26-10-2017",
url = "http://www.asminternational.org/web/heat-treat-2017",

}

Effects of forming route and heat treatment on the distortion behaviour of case-hardened martensitic steel type S156. / Easton, David; Perez, Marcos; Huang, Jianglin; Rahimi, Salah.

2017. Paper presented at Heat Treat 2017, Ohio, United States.

Research output: Contribution to conferencePaper

TY - CONF

T1 - Effects of forming route and heat treatment on the distortion behaviour of case-hardened martensitic steel type S156

AU - Easton, David

AU - Perez, Marcos

AU - Huang, Jianglin

AU - Rahimi, Salah

PY - 2017/10/24

Y1 - 2017/10/24

N2 - The distortion behaviour of carburised and fully heat treated Ni-Cr-Mo martensitic steel (S156) has been experimentally evaluated. Dimensional measurements of Navy c-ring distortion coupons during interrupted heat treatment process for parts manufactured from two forming routes, hot forging and machined from as received bar, was performed. Metallurgical analysis was carried out to attempt to relate the observed microstructural characteristics with measured process induced distortion. The carburisation process was found to be the most severe in terms of inducing distortion. It was found that additional heat treatments during the process results in a larger final distortion. Machining parts from forgings results in higher distortions than that of those machined directly from as received bar due to the added thermal processing history. An FE simulation of the carburisation process for a c-ring coupon is presented.

AB - The distortion behaviour of carburised and fully heat treated Ni-Cr-Mo martensitic steel (S156) has been experimentally evaluated. Dimensional measurements of Navy c-ring distortion coupons during interrupted heat treatment process for parts manufactured from two forming routes, hot forging and machined from as received bar, was performed. Metallurgical analysis was carried out to attempt to relate the observed microstructural characteristics with measured process induced distortion. The carburisation process was found to be the most severe in terms of inducing distortion. It was found that additional heat treatments during the process results in a larger final distortion. Machining parts from forgings results in higher distortions than that of those machined directly from as received bar due to the added thermal processing history. An FE simulation of the carburisation process for a c-ring coupon is presented.

KW - heat treatment

KW - distortion behaviour

KW - steels

KW - S156

KW - c-ring distortion

KW - c-ring coupon

UR - http://www.asminternational.org/web/heat-treat-2017

M3 - Paper

ER -