①Inner R High Frequency Quencher has been
introduced for the hatch of big and small brake
shoes.
②A technique of electrophoresis is
adopted on the surface of brake shoes, therefore ,the
rigidity of paint surface and salt spray test has achieved
international standard and had a higher quality than traditional
spraying.
③The raw materials of brake shoes use panel made
by large steel mills in China, whose thickness is according with
national standard .The panel of brake shoes adopt the criterion
of Q**5B(Gr.D in US,SS**0 inJapan,Fe**0B in Germany, ),and
strength reinforced plate Q**5B(Gr.E in US,SM*0B inJapan,St***3
in Germany).
④CO2protecting welding is introduced and single
point strength that examined by Zhejiang University Mechanics
Research Institute is on average above *5 Fs/KN.
