Tel: +86-15806279578   E-mail: htmachinery@vip.163.com
You are here: Home » Products » Other Products » Foundry Custom After Boss Casting for 17500DWT Oil Tanker

loading

Share to:
facebook sharing button
twitter sharing button
line sharing button
wechat sharing button
linkedin sharing button
pinterest sharing button
sharethis sharing button

Foundry Custom After Boss Casting for 17500DWT Oil Tanker

Material:SCW420,SC480 or according to related rules
Application: Shipbuilding
Weight: 3 to 150 tons
Status:pre-machined
Class certificate:ABS,CCS,NK,LR,DNV,RINA,BV,KR
Payment terms:T/T or L/C
Availability:
Quantity:

Material

Chemical composition
C
SiMnSPResidual Element
NiCrCuMo
less 0.23less0.60less1.60less 0.04Total less 0.80


Tensile Strength

σb

Yield Stress

σs

Elongation

δ

Specimen

Reduction of Area

Ψ

N/mm2

%

%

≥415

≥205

≥24

≥35


The material is common low carbon steel.

We have 8 class certificate including DNV,LR,ABS and so on.

We had supplied marine castings for 15500TEU,20000TEU and 23000TEU container vessel.

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.

1642741044(1)


2)We will make a pattern of the after boss casting based on engineer's technology.

It will cost us around one week.

After that the engineer will check the dimension and make a record.

P11-1

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 before heat treatment

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.

热处理炉

7)dimension check and draw a line for machining.

Visual inspection(VT)

Based on his own eyes,an experienced inspector can identify the outside and inside surface defects,molding errors and improper filling of the large steel castings.

The sand holes,exceeding rough surface in blank,surface shrinkage,misruns and blowholes can be detected through visual inspection.

There would be three times dimension tests.The dimension test after casting in blank,in rough and finished machining.

IMG_2136

8)Rough machining

IMG_20180712_074019

9)NDT withe qualified inspector

磁粉照

10)Welding repair if needed and tempering for stress relief

11)Final machining and NDT

12)Customers' inspection and packing

8-1

2



About Haitai

P5

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.

We have 9 class certificate:ABS,RINA,DNV,LR,KR,BV,CCS,NK and have cooperation with most of Chinese famous shipyards and some foreign shipyards.

In 2011,we supply two sets of castings for PT PAD Indonesia,such as boss casting,rudder carrier and rudder horn.

In 2015,we gradully supply more and more marine castings for domestic market.

In 2018 to 2020,we supply marine castings for 3. Maj shipyard and Brodosplit shipyard.

There are five main steps of inspection and testings to guarantee the quality of large steel castings:dimension accuracy, chemical composition,mechanical property,ultrasonic test and magnetic powder inspection.

Production Process

Method

Remark

Pattern Making

Dimension Inspection for the pattern

Done by engineer

Melting

Chemical composition before and after pouring


Casting in blank

VT


Heat treatment

Test sample with castings

Mechanical Property

Before first rough machining

Check the dimension and drawing the line


After rough machining

UT and MT


Semi-finished machining

UT and MT


Finished machining

UT and MT




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.



P6-3

P10-1

P10-3

Delivery

Our company is near to Shanghai port and we can supply different packing according to customers' specification.

110026


Previous: 
Next: 

WELCOME TO HAITAI

QUICK LINKS

PRODUCT CATEGORY

Copyright © Haian Haitai Casting Co.,Ltd. All rights reserved. Sitemap. Support By Leadong
FEEDBACK

CONTACT PERSON

Brian
 

CALL US

+86-15806279578