Surface Hardening Technology

In the process where Boron is deposed on the surface of a ferric substrate, numerous Boron Atoms form, which react with Fe contained in the substrate and compose stable single- or double phase FeB and Fe2B.

The B-PVD surfaces reach HV 1300~2300 or HRC 73~83 varying on different substrates. After deposing, the durability cold heading and cold drawing dies is fold increased up to tens of times and that of warm-stamping, heading, extruding and forging dies is longered by 3~6 times.

B-PVD’s Charateristics: 
The deposing medium is simply composed and environment-friendly.
The deposed surface looks clear and grey, so don’t need washing. 
The deposing technique does not require hotcharging, so is easy to be carried out. 
The deposing medium can be recycled, so saving costs.

B-PVD’s Applications: 
Moulds and Dies
Valve Balls 
Valve Rods 
Abrasive Blast Nozzles 
Other Wear and Erosion-resistant Parts

The coating mainly carried out by flame-spraying ultrasonically is characteristic of high-speed particle, fine and homogenous coverage and excellent adhesion on the coated object. Since it contains ceramic grains bonded by metals, the coating achieved is able to tolerate wearing and flushing by fluids

Physical Properties:

Index                                                           Value
Thickness                                                0.1~0.3mm
Hardness                   HV0.3~1200 or HRC~75 for WC12Co and WC10Co4Cr
Adhesion                                                 60~80 MPa
Porosity                                                      <1%

The techniques which provide well adhesive and thicker coatings is mainly used in dimension offsetting and carrying out wearable coatings like nickel alloy, cobalt alloy and magnet-free coating under such sever condition as down hole.

Index                                                           Value
Thickness                                                0.5~3mm
Hardness                   HRC 20~60 ; 3-5 times more anti-wearable than normal alloys
Adhesion                                                 300 MPa
Porosity                                                   Porosity-free

The technique is mainly used in insulating exploration and production (EP) systems. The ceramic insulator coated on both sides of the port well live with big torque.

Index                                             Value
Thickness                                0.1~0.3mm
Adhesion                                  30~40 MPa
Porosity                                          3-5%