EFFECTS OF SULPHUR ON HOT DUCTILITY OF LOW-CARBON STEEL AUSTENITE.

被引：0

作者：

Yasumoto, K. ^{[1
]}

Maehara, Y. ^{[1
]}

Ura, S. ^{[1
]}

Ohmori, Y. ^{[1
]}

机构：

[1] Sumitomo Metal Industries Ltd,, Central Research Lab, Amagasaki, Jpn, Sumitomo Metal Industries Ltd, Central Research Lab, Amagasaki, Jpn

来源：

Materials Science and Technology | 1985年 / 1卷 / 02期

关键词：

IRON AND STEEL METALLOGRAPHY - Precipitation - SULFUR;

D O I：

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学科分类号：

摘要：

The hot ductility of low-carbon austenite has been studied in order to reveal the hot-cracking mechanism related to sulfur segregaton and sulfide precipitaton during solution treatment and deformation. Ductility was greatly reduced during high-strain-rate tensile deformation in the temperature range 1073-1373 K. Fracture occurred via a typical intergranular mode, characterized by both shallow dimples caused by microvoid coalescence and rather smooth facets caused by intergranular decohesion. The former morphology is a result of the dense precipitation of sulfides, identified as Fe-rich (Fe, Mn)S, on the austenite grain boundaries. Hot ductility is improved on decreasing the solution-treatment temperature, on decreasing the cooling rate from high solution temperatures, and on isothermal holding at the deformation temperature before starting the tensile test.

引用

页码：111 / 116