Properties for mould material

Composition:

C: 0.38% ,Si:1% Mn:1% Cr 16% Mo:1.5% Ni:1%

Steel Properties:

Increased corrosion resistance in compared with 1.2083,hardned and tempered plastic mould steel,with good polishability.

Applications:

Moulds for the procesing of corrosively active plastics and thermoplastic ,PVC aminoplastics and halogen-containing anti-flame additives

Physical properties

Thermal expansion

10⁶xm       20~50 | 20~100 | 20~150 | 20~200 | 20~300 | 20-400 | 20-500 |

mx^oc         11.1  |  12.9  | 13.4   |  13.8  |  14.2  |  14.6  |  14.9 |

Hot forming

Hot forming ^oc                Cooling

1050-850                                                                                slow cooling in fumace

Heat treatment

Soft annealing ^oc          cooling                  Hardness HB

780-820                 furnace                  Max.235

Composition:

C: 0.37% ,Si:0.3% Mn:1.4% Cr 2.0% Mo:0.2% S:0.008%

Steel Properties:

ABBAB718 is chrome and nickel alloy steel smelt in vacuum,and has been through hardening and tempering treatment before ex-work.lt has the following advantages:

◆    No danger of quenching crack ◆No expense of heat treatment and save the time for heat treatment ◆Reduce the expense of too ◆easy to finish work ◆can carry out nitrogen treatment and flame hardening treatment to improve surface hardness and wearresisting performance ◆718 special hardness type has been through heat treatment up to 35-38HRC after ex-work

◆    Better finish performance ◆better wear-resisting performance ◆Tensile strength and compression strength higher

◆     

Applications:

◆Large-scale plastic ejection product,for example the mould for household apparatus shell of computer,etc.

◆Plastic ejection product,requiring product more than 500,000 mould time

Plastic mould for telephone,audio,PMMA product requiring surface brightness

◆    can be sued for slide block of plastic mould due to high hardness

◆    plastic transmission mould,tool steel of compression mould(suitable to implement nitrogen treatment)

◆    high strength holding block,mould board,parts for structure,etc.

◆    Shaping tool,compression-brake mould(can implement flame hardening and nitrogen treatment if necessarey)

Composition:

C: 0.38% ,Si:0.38% Mn:0.5% Cr 13.6% V:0.3%

Steel Properties:

Stavaxs136 is a best chromium steel .it has the following advantages:

◆    good resist corrosion

◆    good burnishing

◆    good wear-resistace

◆    good machine palted

◆    tools should hard has best strength levels

Applications:

STAVAXS136 can be suitable to all moulds.for its particular property,it is more suitable the reqirements of special environment:

Resist corrosion and strain.

While use injection material with larger friction(containing injection shabing mould) or require mould with long working time,for example electronic components,rejected table-knife tool,container,etc.

High smooth surface,produce optical products,for example camera,sun glass,chemical instrument,injector,andlytical instrument and plastic products

Heat treatment

Soft tempering,in the status of protection,hea up to 780^oC,and cool down to 650 ^oC at the funace with the rate of 10 ^oC per hour,then cool in the air.

Strain removal,through coarse processing,it shall be heated up to 650 ^oC for even heating for two hours,and slowly cool down to 500 ^oC and then cool in the air

Quenchine media A.oil B.Lsothermal quenching C.compressed air  D.cycling air