Forged forging steel gas steam turbine rotor shafts

Description

Jiangsu Liangyi is professional mananufacturer of forged forging steel gas steam turbine rotor shafts,high pressure intermediate-pressure (HP/IP) steam turbine rotor shaft body, forging forged steel Gas Steam  mono block low-pressure  LP Turbine Generator Rotor intermediate Hollow Shafts,turbo generator,Turbomachines,Turbomachinery,turbogenerator forging steel turbine Monoblock Rotor Shafts from china

Our forged steel steam turbine rotor shafts is widely used in  High,middle,low press steam turbine in 35MW,50WM,60WM,70WM steam turbine ,final use in   Applications  in the energy sector,Fossil,Coal-fired power plants,Gas-fired power plant,Combined cycle power plants,Geothermal

All our forging steel gas turbine rotor shafts  melting by Basic Electric Furnace (EAF, AOD, VOD) or  + Electroslag remelting. (ESR) AS PER CLIENTS NEEDS

Forged Turbine rotor Steel for blanks should be melted in open-hearth or arc furnaces with subsequent treatment in out-of furnace refining and degassing units and vacuum or inert gas-shielded pouring. In case of steel melting in an acid-lined open-hearth furnace using special charge or in an arc furnace > with obligatory vacuum pouring it is allowed not to treat the steel in out-of-furnace refining and degassing units.
Ingots for forged turbine rotor blanks can be made with the use of electroslag (ESR) and vacuum arc (VAR) remelting.
. Ingots with a weight of up to 22 tons can be poured without degassing and inert gas shielding.
Steel for ESR and VAR electrodes should be melted aFor VAR electrodes steel not degassed when poured can be used.

FOllowing is material grade that normally used in forging gas turbine rotor shafts
21CrMoV5-11   1.8070
21CrMoV5-7   1.7709
28CrMoNiV4-9 1.6985
26NiCrMoV14-5 1.6957
28CrMoNiV5-9 1.6985
30CrMoNiV5-11 1.6946
X22CrMoV12-1  1.4923
ASTM A470/A470M A 472/A 472M Grade D Class-8
26NiCrMoV8-5  1.6931
22CRMONIWV8-8 1.6945
X12CRMOWVBN10-1-1 1.4906

X14CrMoWVNBN10-1 1.4902

X21CrMoV12-1 1.4926

34ХМА
34ХН1МА
34ХН3МА
36ХН3МФА
38ХН3МФА
27ХН3МФА
25Х1М1ФА
20Х3МВФА
25Х2Н4МФА

Following is  production process of  forged turbine rotor shafts is as follows:purchase ingot,ingot melting,check the surface,elements analysis,store in warehouse,forging process planning，cutting，heating,forging,heat treatment after forging,rough products inspection,rough machining on surface, Ultrasonic test, Rough machining, Ultrasonic test again, quenching and tempering treatment, samples,mechanical property and metallurgical test hardness test, rough machined on surface again, ultrasonic tes,. semo-finish machined, all dimention inspection, UT test, MT test, remanence of magnetism test, stress relieving treatment, packages, store in warehouse

We have following Forging Equipments of make forging of 1.6945 forging gas turbine rotor shafts, 4500t &850000t Hydraulic forging equipments; 50t&15t Manipulators; 2t&1t&450kg air hammer; 5t electro hydraulic hammer etc.


We have Heat treatment Equipments  of make forged of  turbine rotor shafts φ2*12m pit furnace; φ8*3*3m table resistor furnace; 1.5*0.8*1.5m box resistor furnace; 8*3*3m gas furnace; 6*3*2m gas furnace; 7.5*4*2.5 gas furnace;16*2.5*2.5 gas furnace etc.

Also we have following Machining Equipments of maching forged steel gas turbine rotor shafts, ; including φ2*12m heavy sleeper; φ5m vertical lathe; floor type boring and milling machine; CNC miller ;φ1.6*16m heavy sleeper; single-arm planer; boring and milling machine etc.

Residual stresses in forged gas steam turbine blanks should not exceed 49 MPa (5 kgf/mm2). Rotor forging blanks with a more than 400 mm diameter body should be tested for residual stresses. Residual stresses in shaft blanks with a more than 400 mm diameter are tested only if required in a drawing. Shaft and rotor blanks less than 400 mm in diameter are not tested for residual stresses, but after final tempering the blanks should be slowly cooled in the furnace.

Periscopic examination of forged turbine rotor shafts
During a periscopic examination at an up to double magnification degree, the surface of a channel of rotor and shaft blanks should be free of cracks, flakes, blowholes, shrinkage porosity remainders, more than 3 mm long nonmetallic impurities or clusters of more than 10 nonmetallic impurities each up to 1.5 mm in size for a 60 cm area, chain arrangement of the impurities .
A maximum of 10 isolated nonmetallic impurities over 1.5 to 3 mm in size and 25 nonmetallic impurities 1 to 1.5 mm in size all over a rotor channel surface. Separate isolated nonmetallic impurities smaller than 1 mm are not taken into account.
The total quantity of impurities of all sizes on a channel surface should not exceed 75.
If necessary, it is allowed to perform spot grinding or overall boring of a channel without the prior agreement of the consumer, if the nominal channel size is increased by not more than 10% in relation to the consumer's drawing as a result. A greater deviation should be agreed by the consumer.

Thermal testing of forged gas turbine rotor shafts
Forged turbine Rotor and shaft blanks should pass thermal testing at the consumer, if such a test is provided for in drawings agreed by the manufacturer and consumer.
If as a result of holding the blanks at a maximum temperature a stabilized deflection greater than that specified in the drawing is detected, or a residual deflection is seen after the blanks have been cooled, the blank should be extra-tempered at the consumer at a temperature not lower than the main tempering and in being continuously rotated, and then pass a repeated thermal test.
In case of unsatisfactory findings of tests after the re-tempering the question as to the further use of the blanks should be determined jointly by the consumer and the manufacturer

After finished all our forged steel turbine rotor shafts, all our turbine rotor shafts will be done in following test
Tensile testing
Charpy Testing (-320°F to +350°F)
Hardness testing
Macro-etching
Non-Destructive Test Capabilities to Military and Commercial Standards (ASNT)
Level III / Test Examiner
Level II inspectors qualified to perform
Ultrasonic testing
Liquid penetrant inspection
Magnetic particle inspection
Dimensional/visual inspection
Metrology laboratory (dimensional)

Pyrometry laboratory (temperature)

Welcome your inquiry of forged forging steel gas steam turbine rotor shafts