بررسی تاثیر مقدار کرنش و دمای نورد بر ریزساختار و سختی اتصال انفجاری ورق های فولاد 304- مس

Asadian, Ebrahim; Khalaj, Gholamreza; Khanzadeh Gharahshiran, MohammadReza; Bahri, Sirous

Volume 14, Issue 1 (3-2019) مواد پرانرژی 2019, 14(1): 13-25 | Back to browse issues page

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Asadian E, Khalaj G, Khanzadeh Gharahshiran M, Bahri S. بررسی تاثیر مقدار کرنش و دمای نورد بر ریزساختار و سختی اتصال انفجاری ورق های فولاد 304- مس. مواد پرانرژی 2019; 14 (1) :13-25
URL: http://isaem.ir/article-1-1267-en.html

بررسی تاثیر مقدار کرنش و دمای نورد بر ریزساختار و سختی اتصال انفجاری ورق های فولاد 304- مس

Ebrahim Asadian

, Gholamreza Khalaj ^*

, MohammadReza Khanzadeh Gharahshiran

, Sirous Bahri

Saveh Branch, Islamic Azad University , gh.khalaj@srbiau.ac.ir

Abstract: (2325 Views)

In this research, the effect of the amount of strain and rolling temperature on the microstructure and the hardness of the explosive bonding of 304 stainless steel- copper sheets was investigated. Explosive welding was performed with two explosive thickness (46 and 79 mm) and stand-off distance (2 and 3 mm). The results of the optical microscope after welding showed that all samples had a common wavy interface. The results of scanning electron microscopy and EDS analysis showed that in all samples the melting region was observed in the joint. The results of micro-hardness tests showed that the most hardness in interface was the sample with the highest thickness of the explosive and the stand-off distance. Rolling operations were carried out with a thickness reduction of 2 mm in two different conditions without preheating and preheating at 300 ℃ and 30 minutes. The results of the optical microscopy after rolling showed that in all cases after rolling, a decrease in the amplitude of the waves (wavelength thickness) was created. The results of the scanning electron microscopy and EDS analysis in the post-rolling and pre-heat conditions indicated that as a result of pre-heat before rolling operation, the copper and iron elements diffused from the interface of copper melting-metal region. Investigating the results of post-rolling non-treating sampmles showed that hardness after rolling in all samples increased. But in pre-heated samples, the hardness was less than that of as-welded samples.

Keywords: Joining, Explosive Welding, Stainless Steel, Copper, Rolling, Preheating Treament.

Full-Text [PDF 1238 kb] (295 Downloads)

Type of Study: Research | Subject: جوشکاري انفجاري شکل دهي انفجاری
Published: 2020/05/18