Export turbine impeller, radial impeller, impeller castings description
Material: Stainless steel (17-4PH)
Standard: ASTM A564
Casting process: alkaline phenolic resin casting
Min. wall thickness: 8mm
Heat treatment method: solution treatment and aging treatment
Surface treatments: shot blasting
Tensile strength: 1400MPa
Yield strength: 1250MPa
Reduction of area: 43%
Tolerance grade: CT9
Application: pump, valve, impeller, power facilities, Construction Tools, Oil and gas system, Agriculture Machinery, Firefighting Equipment, Metallurgical Equipment, Shipyard, mining equipment parts.
Technical key points:
Ø To take special process protection measures: cavity argon blow treatment, that is, before pouring, filled in the cavity with inert gas argon quickly , since argon is heavier then the air, it won’t escape in short time and form a "vacuum" area, which will ensure the molten steel always under isolate protection from secondary oxidation, thus prevent the steel from regeneration inclusions.
Ø Apply bottom injection open gating system, set the section area ratio of the pouring system as:
∑A vertical：∑A horizontal：∑A inner =1.0:（0.8-0.9）：（1.1-1.2）
Inner runner section area ∑A inner=K K-flow rate，take value 0.78 G- metal liquid total weight（Kg）
Ø Pouring should be fast, first calculate the pouring time, apply plunger type leakage bag to pour in stipulated time, this process are with good slag stopping function, at the same time pouring pressure is increased. Pouring speed must be controlled to be full stream and flow into the cavity fast, till pouring gate be filled up.
Parts of our customers:
1. What’s the minimum wall thickness of the castings you produce?
A: The minimum wall thickness of the castings we produce is 8mm.
2. What’s the maximum weight of castings you can produce?
A: The maximum weight of castings we can produce is 1.8 tons.
3. Can you list the smelting equipment of your company?
A: We have 3 models of medium-frequency induction furnaces: 0.5 tons, 2 tons and 3 tons.
4. Which kinds of NDT methods that your company can provide?
A: The NDT we provide are PT, MT, UT and RT.
5. Which grade of radiographic inspection can you reach?
A: We can reach Grade 2.
6. Can you guarantee the traceability of your products?
A: Regular products: On-site inspection record and FG Test report will be kept more than 3 years
Important products：On-site inspection record and FG Test report will be kept more than 5 years , applying processing card system, and make sure one card for each piece, thus to keep each piece of products are traceable.
Wuxi Lingtong Casting Co.,Ltd.
Attn: Ms. Vivian Wang
Tel: +86 510 85990876
Cell: +86 13861777146 15852600207
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