DIN 1.2080 SOĞUK İŞ TAKIM ÇELİĞİ ZIMBALARDA DERİN KRİYOJENİK İŞLEM VE TEMPERLEMENİN ALIN AŞINMASINA ETKİSİ

Abstract

In this study, punchs made of DIN 1.2080 cold work tool steel were subjected to the deep cryogenic treatment after deep cryogenic tempering treatment and non-treated punches were conducted on the stainless steel (AISI 304) sheet metal at punch machine and on the face wear behavior of the punches were examined. For this purpose, the tool steel punches were treated in deep cryogenic at -145o C. Additional, after deep cryogenic tempering process was made. Each punch at the end of 500th , 1000th , 1500th , 2250th , 3000th perforation, the face wears of punches were obtained by the optical stereo microscope (OM) images and the scanning electron microscope (SEM), microstructure and hardness measurements was investigated by analysis. As a result of the study, at the small number perforation, it was generally found the cryogenic treatment had positive effects on the DIN 1.2080 tool steel punches increased face wear resistance. However, the tempering treatment wasn't shown a significant effect on the face wear resistance.

Keywords

• Piercing punch, Deep cryogenic treatment, Tempering, Face wear

DIN 1.2080 SOĞUK İŞ TAKIM ÇELİĞİ ZIMBALARDA DERİN KRİYOJENİK İŞLEM VE TEMPERLEMENİN ALIN AŞINMASINA ETKİSİ

Öz

Bu çalışmada, kriyojenik işlem yapılmış, kriyojenik işlem sonrası temperleme yapılmış ve işlem yapılmamış soğuk iş takım çeliği DIN 1.2080 zımbalar ile paslanmaz çelik sac (AISI 304) levhalar zımba makinesinde işlenerek delme deneyleri yapılmış ve zımbalarda oluşan alın aşınma davranışları incelenmiştir. Bu amaçla soğuk iş takım çeliği zımba -145oC’de derin kriyojenik işleme tabi tutulmuştur. Ayrıca derin kriyojenik işlem sonrası temperleme yapılmıştır. Herbir zımba 500, 1000, 1500, 2250, 3000 delme aşamalarında, delme ucu alın aşınmaları optik stero mikroskop (OM) ve tarama elektron mikroskobu (SEM), mikroyapı incelemeleri ve sertlik ölçümleri yapılarak incelenmiştir. Yapılan çalışmalar sonucunda, delme zımbası için çok düşük kalan sayılar için kriyojenik işlemin DIN 1.2080 takım çeliği zımbanın alın aşınma direncini artırdığı görülmüştür. Ancak temperleme işleminin alın yüzey aşınmasına önemli bir etki yapmadığı görülmüştür.

Anahtar Kelimeler

• Delme zımbası, Derin kriyojenik işlem, Temperleme, Alın aşınması

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