Step Ring

The model of stepwise ring

The photo shows the model step-ring in the form of fragments having a minimum wall thickness of 8mm, the average wall thickness of 10mm and a maximum wall thickness of 12mm.

This model is a step ring, made of steel of low hardenability and passed the final heat treatment technology JSC “SPC” TECHMASH and OPP “in the form of induction heating followed by cooling water and low-temperature tempering.

After such a heat treatment step model of the ring has the options listed in the table.

Ring-1Ring-2Ring-3Ring-4

 

№

n / n

Name

parameter model

graded ring

Velichinailiharakteristika

The wall thickness of the model, mm

8

10

12

1.

 Chemical composition of steel

   low hardenability

C = 0.62%, the remaining quantitative chemical elements in steel is the “KNOW HOW”

2.

  The depth of the hardened layer to the structure, sotoyaschey of 50% martensite and 50% troostita mm
  • on the outer diameter – 2.6
  • on the inner diameter – 2.4
  • at the ends – 2.5

3.

  The hardness of the entire surface, HRC

56 … 58

4.

  The microstructure of the hardened layer

 Minutely bristled martensite is not coarser than 4 points (the maximum depth of needles – 6.0mk) GOST8233 “Steel. Microstructure Standards”

5.

 The hardness of the core, HRC

44 … 48

31…35

31 … 35

6.

  The microstructure of the core

Troost

Troost + sorbitol