Φ38 mm×6. 6 mm seamless tube of steel TP347H (1Cr19Ni11Nb) was produced at Taiyuan Steel by hot metal pretreatment + 30 t EAF melting alloying steel - 75 t K-OBM-S blowing - VOD treatment - LF - bloom by 5. 6 t ingot or 220 mm×220 mm concasting billet -Φ100 mm tube blank piercing - cold rolling ( cold drawing) flow sheet.
太钢采用铁水预处理+30 t电弧炉熔化合金钢水-75 t K-OBM-S吹炼-VOD处理-LF精炼-5．6 t铸锭开坯(或220 mm×220 mm铸坯)-Φ100 mm管坯穿孔-冷轧(冷拔)流程,生产了Φ38 mm×6．6 mm TP347H (1Cr19Ni11Nb)钢无缝管。
To introduce the productive process, cold - drawing process and production quality of tube blank of cold -drawing geologic drilling tube with Φ210 mm 40 Cr casting blank in Tianjin Seamless Steel Tube Plant.
The paper concerns the process parameters of continuous casting and cold-drawing of 12Cr2MoVWTiB seamless steel pipe for high pressure boiler,proposes the feasibility of produced high pressure boiler pipe of 12Cr2MoVWTiB steel by continuous casting billet,the surface quality and mechanical properties of the boiler pipe can meet the demand of standard GB5310-1995.
It is demonstrated that the bar steel rolled by this method can match the cold drawn steel in the accuracy of the ellipse degress of cross-section and moreover the steel is more suitable for grinding and levelling in mechanical properties, which are σ_b=956～960MPa, HB=231～234, δ=12～17％.
In this paper, the effect of small amouts of Zr (0.032wt% and 0.069wt%) on the recrystallization temperature and the kinetics of recrystallization for a 92% cold drawn commericial electrical conductor grade aluminum wire with 2.87mm diameter has been studied.
To ensure the reliability of petroleum machinery at low temperatures, the impact property of homemade cold drawn square pipes of steel Q345A(16Mn) is measured within the range of 20 ℃-60 ℃ . The safety of the pipes is evaluated with the API Spec 8C standards.
Our model is based on shear-lag analysis using a bilinear bond law (stress-slip relationship) which, in turn, is a simplified representation of the true stress behavior as a function of strain for cold-drawing polymers.
Recall that the shape recovery in case of cold-drawing (i.e.
For the low-temperature dispersion of a polymer oriented by cold-drawing, both the spectra of relaxation times and the magnitudes of the components of the dielelectric permitivity tensor have been calculated.
By uniaxially cold-drawing the polymer, PLLA can be endowed with varying degrees of piezoelectricity.
The aim of this paper is to investigate the influence of residual stresses, due to cold-drawing, on the shape of the tensile stress-strain curve and particularly its influence on the ratio σ0.2/σmax through a numerical and experimental work.
A study of microstructure (X-ray diffraction), magnetic properties (switching field associated with the magnetic bistability), and giant magnetoimpedance (GMI) effect in cold-drawn Fe77.5B15Si7.5 amorphous wire is presented.
Such cold-drawn wire was subjected to current annealing for tailoring the magnetic and GMI properties.
Imperfections, lattice constants and densities of cold-drawn and of recrystallized aluminium wires
Differential scanning calorimetry (DSC) of cold-drawn samples of a blend of linear (LPE) and branched polyethylene (BPE) shows that the melting point of the high temperature peak decreases monotonically with increasing draw ratio.
TheYoungs modulus of HDPE filaments cold-drawn to different extents has been determined.
The lattice constant of a cold drawn Al wire in the direction of its axis was slightly smaller (a25=4.049 44) than that of the recrystallized wire (a25=4.049 47 ?), but was larger in the transverse direction (a25=4.049 63 ?).
The results show, for annealing temperatures above 200°C, a stronger increase in long spacing values for cold drawn samples.
On the other hand, on the cold drawn samples μ was found to be about 2.3 when determined from storage modulus data, and about 1.5 from loss modulus, indicating an acceleration effect on the molecular mobility in PC.
3] between the crystallinity and the branching ratio e for polyethylene (PE) cold drawn to the natural draw ratio.
This method was applied to cold drawn low density polyethylene before and after annealing at different temperatures.