China supply thermal refining metal 40Cr shaft bolt

1.Products imformation

1)the forging of the product.and thay are placed in the workshop.

2)continue producing according to requirements form the clients

3)the third step is the ordinary lathe ,after grindering in the lathe.both ends of the product is flat.

4)after the CNC lathe,the product they are going to be semi-finished products

5)drilling,before drilling ,the worker will dig oil slot.

6) Metalworking workshop and then heat,  the heat treatment can nearly reach to one thousand Celsius degree after this step.The quality of the product will be firmly strengthened .

7)we ensure the quality .after strengthening  and adjusting the quality,we will have an important process called tempering!

8)The inner side’s grinding of the product, and then the grinding of the outer side .we do  this  in  turn so that we would not do damage  to  the  product.

9)the packing in our workshop,before packing we spray the rust inhibiting oil

10)after all these steps .the last  one is entering the warehouse.

 ducts images

Factory views and certification: