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Heat-treated mold steels

Type Non-alloyed mold steel Corrosion resistant case hardening steel Corrosion resistant heat treated stainless steel Standard case hardening steel Heat treated mold steel... [Pg.365]

Type Heat treated mold steel Standard hot working Highly alloyed chrome Special case hardening Special through hardening... [Pg.365]

The material reportedly used for the most tooling has been a machinable grade of heat treated tool steel having a hardness of 34-42 on the Rockwell C scale. Since there is no metal-to-metal tool closure, close tolerances, or sophisticated cooling, the tooling costs are estimated to be about one-third of their counterparts for injection molding. [Pg.277]

Beryllium-copper (BeCu) alloys 165 and 25 are normally used for blow molds. These materials display medium to good thermal conductivity with good durability. Stainless steels such as 17-4 and 420 are also frequently employed in blow molds where durabihty and resistance to hydrochloric add are required. Heat-treated A-2 steel is often used as an insert in pinchofis where thermal conductivity is not a concern and high quality parts are required. [Pg.191]

The mixed solution in the glass beaker was kept in a water bath of 80 °C for 8 h until it transformed into a honey-like yellow transparent gel. The gel was dried at 120 °C for 24 h and became a deep yellow sticky gel. This gel was rapidly heated to 300 °C and at this stage an auto combustion process occurred accompanied with a brown fume, and finally yielded a fluffy precursor. The precursor was crushed and then heat treated at temperatures ranging from 600 to 1100 °C for 3 h in an oxygen atmosphere. For sintering, powders calcined at 1100 °C for 3 h were dry pressed into 015 mm pellets in a steel mold at 30 MPa and then cold isostatically pressed (CIP) at 200 MPa. The pellets were then sintered under vacuum at 1800 °C. The vacuum in the furnace was 10 Pa during the sintering period. [Pg.167]

Micronized and surface treated mieas and wollastonites are used in automobile and van fascias and fenders made by Reinforced Reaction Injection Molding (RRIM) of polyurethanes and polyureas. These minerals add strength, stiffness and heat resistanee, and lower the coefficient of thermal expansion so that the plastie part mates better with the steel frame of the vehiele. Combinations of wollastonite with mica are used, since the mica gives a smooth surface (improved Distinetness of Image), an essential charaeteristie for aesthetics after painting. Properties of miea- and wollastonite-reinforced RRIM are shown in Tables 17 to 20. [Pg.383]


See other pages where Heat-treated mold steels is mentioned: [Pg.81]    [Pg.81]    [Pg.398]    [Pg.149]    [Pg.15]    [Pg.1549]    [Pg.15]    [Pg.374]    [Pg.282]    [Pg.282]    [Pg.17]    [Pg.31]    [Pg.32]   
See also in sourсe #XX -- [ Pg.55 ]




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