9SiCr

الوصف

Introduction:

9sicr steel is low alloy cutting steel, but also often make cold work mould parts, the effect is very good. It than chrome steel (Cr2 or 9 Cr2) have higher hardenability and hardenability and have high tempering stability. The steel quotations from the former Soviet union as early as 9 xc, once known as 9 crsi steel. Composition and performance with 9 xc are exactly the same. In our country has a long history.

Specification  :

Equivalent Grades:

Mechanical Properties:
The steel forging performance is good, because of easy decarburization, need in the neutral atmosphere or protective atmosphere furnace heating. Conditioning treatment with heat forging, can obtain fine tempered sorbite structure, simplify the process, time saving, both good machinability, and the ideal heat treatment group.
Heat treatment specification and metallographic organization:
Specification: heat treatment quenching sample 820 ~ 860 ℃, oil cooling.
Low delivery status: steel in annealing state delivery.

Low point temperature (approximation)

Ac1 = 770 ° C, 730 ℃, Accm Ar1 = = 730 ° C.

Low thermal specification

Needs in the neutral atmosphere or protective atmosphere furnace heating, preheating temperature of 700 ~ 80 ° C o for the first time, holding time 1. 0 ~ 1.5 h, the second 850 ~ 900 ° C, 2 min/mm, time of heat preservation heat insulation at 100 ℃ or less after speed up to 1100 ~ 1150 ℃, holding time 1.0 ~ 1.5 min/mn. Should frequently turning of billet in the process of heating, uniform heat, fully burned. The forging temperature 1050 ~ 1100 ° C, repeated double cross to the upsetting forging, after forged alloy carbide grade level 2 or less.

Application
9 sicr alloy tool steel can be used to make complex shape and small deformation, high wear resistance, low speed cutting tools, such as drilling, thread tools, reamer, die, tap, thread rolling plate and screw rolling wheel, etc. (plastic die steel, can be used in the top bar, create size increase, complicated shape and high accuracy requirement of plastic film.