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English 
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| Quantity: | |
|---|---|
Material
| Material | C | Si | Mn | P | S | Cr | Mo |
| ZG42CrMo | 0.38-0.43 | 0.15-0.35 | 0.75-1.00 | ≤0.035 | ≤0.035 | 0.80-1.10 | 0.15-0.25 |
| Material Standard | GB, EN, DIN, ASTM, GOST, JIS, ISO |
| Weight | 3-70 tons |
| Heat treatment | Normalizing+tempering |
Prodution process
| No. | Equipment Name | Quantity(Set) |
| 1 | Transformer substation | 1 |
| 2 | Full set of wooden molding equipment | 10 |
| 3 | Sodium silicate sand mix line | 4 |
| 4 | Alkaline phenol resin sand mix line | 2 |
| 5 | 25 tons Electric arc furnace | 1 |
| 6 | 50 tons Intermediate frequency furnace | 2 |
| 7 | 120 tons Refining furnace | 1 |
| 8 | 120 tons VD furnace | 2 |
| 9 | 12m*9m*6m Heat treatment furnace | 3 |
| 10 | 120 tons Large-scale shot blasting machine | 1 |
| 11 | 150 tons Travelling crane | 2 |
| 12 | 125 tons Travelling crane | 3 |
| 13 | 200 tons Travelling crane | 2 |
| 14 | CNC gantry boring and milling machine | 2 |
| 15 | 2.5m-10m Digital vertical lathe | 16 |
| 16 | Boring and milling machine | 13 |
| 17 | Horizontal lathe | 3 |
| 18 | Large dust removal equipment | 7 |
1)The engineer will firstly prepare the technology and do a simulation before pouring.
We use solidcast for simulation.
Mostly we will simulate for new products,for ordinary ones we have enough experience.
2)We will make a pattern of the work roll chock based on engineer's technology.
It will cost us around one week.
After that the engineer will check the dimension and make a record.
We have our own pattern making shop,the pattern quality is under control.
We are always busy,so we have around 5-7 sub-contractors to help us for the pattern,
we will send our technican for quality during process.
3)Sand molding making will be made by experienced wokrers.
4)Pouring and cooling.
There are one 8tons electrical arc furnace;
Two 50 tons medium frequency furnace;
One 120 tons refining furnace and one 120 tons VD furnace;
5)Clean the sand and cut the riser after normalizing.
6)Heat treatment will cost 7days( 4 days normalizing and 3 days tempring).
There are 8 heat treatment furances with max. one is 12m*9m*6m.
7)dimension check and draw a line for machining.
8)Rough machining
We have 4-10m vertical lathe,enough boring and milling machine.
We can do rough or finished machining.
9)NDT withe qualified inspector
10)Welding repair if needed and tempering for stress relief
11)Final machining and NDT
12)Customers' inspection and packing
About Haitai
Haian Haitai Casting Co.,Ltd. is established in 2003.
We supply large steel castings with low carbon or alloy steel from 3 tons to 150 tons per piece.
With a quick development,now we had supplied steel castings 6,000 tons per month.
There are three workshop for sand mold making,one workshop for machining and one for post procedure.
Our main products are for cement mill(around 30%).
We supply around 400pcs kiln tyres,170 sets of ring gears and 930pcs supporting rollers a year.
We also have rich experience of the castings for shipbuilding with 9 class certificate.
Work roll chock is our ordinary product,
we have rich experience for different kind of it.
Testing Equipment
| No. | Equipment Name | Quantity(Set) |
| 1 | Sand analysis equipment | 1 |
| 2 | Impact sample low temperature meter | 1 |
| 3 | Direct reading spectrometer(OXFORD) | 2 |
| 4 | ONH analyzer | 1 |
| 5 | ZEISS metallurgical microscope | 1 |
| 6 | Pendulum impact tester | 1 |
| 7 | Microcomputer controlled electro-hydraulic servo universal test machine | 5 |
| 8 | Various hardness tester | 4 |
| 9 | Magnetic defect detector | 5 |
| 10 | Ultrasonic flaw detector(digital) | 1 |
| 11 | CX-52 Total station | 1 |
| 12 | Stylus roughness meter | 1 |
We do the test according to diffrent production step,
such as chemical composition,UT,MT and mechanical property.
In 2021,Haitai inspection and testing center got approval from CNAS.
In my opinion,after we got approval from CNAS,we are more trustable.
We had got the approval,but we also receive regular training to keep us fresh.
Delivery
Our company is near to Shanghai port and we can supply different packing according to customers' specification.
