Carbon Steel Wire Rod Research Articles

Dynamic Strain Aging and the Wire Drawing of Low Carbon Steel Rods.

The dynamic strain aging behaviour of low carbon steel wire rod was examined at room temperature to 450°C using tensile testing at strain rates of 10-4 to 10-1 s-1 The effects of temperature and strain rate on the yield stress, flow stress, UTS, fracture stress, and fracture strain were investigated in detail. In agreement with previous studies, work hardening peaks, minima in ductility, and negative strain rate dependences of the flow stress were observed between 100 and 400°C, the positions of which depended on the strain rate. A model for dynamic strain aging is employed to predict whether or not it will occur at the strain rates and temperatures involved in commercial wire drawing. For a steel containing 32 ppm N, a temperature higher than about 315°C must be attained for dynamic strain aging to occur; this is higher than the temperatures usually encountered in drawing. However, the model also predicts that if the N content is increased to 115 ppm, the minimum temperature for dynamic strain aging decreases to about 250°C, which can be attained if the die and capstan cooling are not adequate. The negative rate dependence of the flow stress attributable to dynamic strain aging is considered to promote flow localization and, therefore, to be a possible cause of wire breaks during drawing.

Rapid Heating Patenting of High Carbon Steel Wire Rods

Rapid Heating Patenting of High Carbon Steel Wire Rods

高炭素鋼線の急速加熱パテンティングについて

高炭素鋼線の急速加熱パテンティングについて

The Direct Patenting of High Carbon Steel Wire Rod by Film Boiling

The Direct Patenting of High Carbon Steel Wire Rod by Film Boiling

沸騰水を利用した高炭素鋼線材の直接パテンチング処理法

沸騰水を利用した高炭素鋼線材の直接パテンチング処理法

A Comparison of Cold Drawability of Medium Carbon Steel Wire Rod, Arc Furnace Steel vs LD Steel

転炉,電炉鋼材の品質特性を引抜加工を通し検討した結果,転炉鋼の引抜性が電炉鋼にくらべてすぐれていることと,その原因は転炉鋼の引抜きにおける摩擦係数が低く,これが2次せん断ひずみを小さくするためであることがわかった。また,引抜性におよぼすtramp element, Cu, Ni+Crの効果を電炉鋼材で調べた結果,Ni+Crが少なければCu含有による引抜性が向上し,電炉でも転炉鋼に匹敵する鋼材をつくり得ることを確認した。また引抜限界を考察し,理論式と実験値がほぼ一致した。