Реферат

This specification covers ferrous metal injection molded (MIM) materials fabricated by mixing elemental or pre-alloyed metal powders with binders, injecting into a mold, debinding, and sintering with or without subsequent heat treatment. These materials are: low-alloy steel produced from admixtures of iron powder and other alloying elements such as nickel and molybdenum (MIM-2200 and MIM-2700); low-alloy steel produced from admixtures of iron powder and other alloying elements such as nickel, molybdenum, and carbon (MIM-4605); austenitic stainless steel produced from pre-alloyed powder or an admixture of powders (MIM-316L); precipitation hardening stainless steel produced from pre-alloyed powder or an admixture of powders (MIM-17-4 PH); and ferritic stainless steel produced from pre-alloyed powder or an admixture of powders (MIM-430L). Chemical analysis shall be performed for the elements copper, chromium, molybdenum, and nickel. The materials shall be subjected to tensile test and unnotched Charpy impact energy test.

Область применения

1.1 This specification covers ferrous metal injection molded materials fabricated by mixing elemental or pre-alloyed metal powders with binders, injecting into a mold, debinding, and sintering, with or without subsequent heat treatment.

1.2 This specification covers the following injection molded materials.

1.2.1 Compositions:

1.2.1.1 MIM-2200, low-alloy steel

1.2.1.2 MIM-2700, low-alloy steel

1.2.1.3 MIM-4605, low-alloy steel

1.2.1.4 MIM-4140, low-alloy steel

1.2.1.5 MIM-316L, austenitic stainless steel

1.2.1.6 MIM-17-4 PH, precipitation hardening stainless steel

1.2.1.7 MIM-420, ferritic stainless steel

1.2.1.8 MIM-430L, ferritic stainless steel

1.3 Chemical composition limits are specified in Table 1.

TABLE 1 Chemical Composition Requirements For Metal Injection Molded Materials

Material
Designation

 

Fe

Ni

Cr

Co

Mo

C

Cu

Si

Mn

Nb + Ta

V

Other

MIM-2200

Min.

Bal.

1.5

-

-

-

-

-

-

-

-

-

-

 

Max.

Bal.

2.5

-

-

0.5

0.1

-

1.0

-

-

-

1.0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MIM-2700

Min.

Bal.

6.5

-

-

-

-

-

-

-

-

-

-

 

Max.

Bal.

8.5

-

-

0.5

0.1

-

1.0

-

-

-

1.0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MIM-4605

Min.

Bal.

1.5

-

-

0.2

0.4

-

-

-

-

-

-

 

Max.

Bal.

2.5

-

-

0.5

0.6

-

1.0

-

-

-

1.0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MIM-4140

Min.

Bal.

-

0.8

-

0.2

0.3

-

-

-

-

-

-

 

Max.

Bal.

-

1.2

-

0.3

0.5

-

0.6

1.0

-

-

1.0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MIM-316L

Min.

Bal.

10

16

-

2

-

-

-

-

-

-

-

 

Max.

Bal.

14

18

-

3

0.03

-

1.0

2.0

-

-

1.0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MIM-420

Min.

Bal.

-

12

-

-

0.15

-

-

-

-

-

-

 

Max.

Bal.

-

14

-

-

0.4

-

1.0

1.0

-

-

1.0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MIM-430L

Min.

Bal.

-

16

-

-

-

-

-

-

-

-

-

 

Max.

Bal.

-

18

-

-

0.05

-

1.0

1.0

-

-

1.0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MIM-17-4PH

Min.

Bal.

3

15.5

-

-

-

3

-

-

0.15

-

-

 

Max.

Bal.

5

17.5

-

-

0.07

5

1.0

1.0

0.45

-

1.0