  The main aim of the RHIC Beam Energy Scan (BES) program is to explore the QCD
phase diagram which includes search for a possible QCD critical point and the
phase boundary between QGP and hadronic phase. We report the collision energy
and centrality dependence of kinetic freeze-out properties from the measured
mid-rapidity ($|y|<0.1)$ light hadrons (pions, kaons, protons and their
anti-particles) for Au+Au collisions at the center-of-mass energy
$\sqrt{s_{NN}} =$ 7.7, 11.5, 19.6, 27, and 39 GeV. The STAR detector, with a
large uniform acceptance and excellent particle identification is used in the
data collection and analysis. The kinetic freeze-out temperature $T_{\rm{kin}}$
and average collective velocity $\langle \beta \rangle$ parameters are
extracted from blast-wave fits to the identified hadron spectra and
systematically compared with the results from other collision energies
including those at AGS, SPS and LHC. It is found that all results fall into an
anti-correlation band in the 2-dimension ($T_{\rm{kin}}$, $\langle \beta
\rangle$) distribution: the largest value of collective velocity and lowest
temperature is reached in the most central collisions at the highest collision
energy. The energy dependence of these freeze-out parameters are discussed.
