China Customized Brass lost wax steel casting foundry manufacturer

Product Details


Process

lost wax casting, Investment Casting, precision casting, Silicon sol casting,

Material

Brass, Iron, Stainless Steel, Carbon Steel, Aluminum, ductile iron

Material Grade

GB, ASTM , AISI , DIN , BS,

Weight

0.01 kg~120kg

Accuracy

Class CT4~CT7

Surface Roughness

Up To Ra1.6~Ra12.5

Applied Software

proe, catia, ug, solidworks, cad, pdf, etc

Production Capacity

More Than 100T Per Month

Heat Treatment

Anneal, Quenching, Normalizing, Carburizing, Polishing, Plating, Painting, etc

Machining Equipment

CNC Center , CNC Machines, Turning Machines, Drilling Machines , Milling Machines, Grinding Machines, etc

Measuring Tool

CMM , Projector, Vernier Caliper, Depth Caliper, Micrometer, Pin Gauge, Thread Gauge , Height Gauge, etc

QC System

100% Inspection Before Shipment

Report

100% Report with shipment

Transport

Air or Sea


FAQ:

1. How to get a quotation?

Please send us drawings in igs, dwg, step etc. together with detailed PDF.

If you have any requirements, please note, and we could provide professional advice for your reference.

2. What if we do not have drawing?

Samples would be available, and we would send you drawing to confirm.

Of course, we would ensure the safety of the drawing.

3. How to pay?

For small quantity, we could provide Paypal, Paypal commission will be added to the order.

For the big one, T/T is preferred.

4. How to ship?

For small quantity, we have cooperation with TNT, FEDEX, UPS etc.

For big quantity, air or sea would be available for you to choose.

5. What about the packing details?

We attached our normal packing details.

If you have any special requirements, we would be willing to help.

6. What about the delivery time?

It would be 20-30 days normally for the parts to be ready and we had a system to ensure the time.

When you made your order, you would know.

Copper and Copper Alloys Casting Problems

Group II alloys

Group II alloys are those that have an intermediate freezing range, that is, a freezing range of 50 to 110oC between the liquidus and the solidus. Group II alloys are: beryllium copper (C81400, C82000, C82200, C82400, C82500, C82600, C82800), silicon brass (C87500), silicon bronze (C87300, C87600, C87610, C87800), copper-nickel (C96200, C96400).

Beryllium Coppers. These alloys are very toxic and dangerous if beryllium fumes are not captured and exhausted by proper ventilating equipment. They should be melted quickly under a slightly oxidizing atmosphere to minimize beryllium losses. They can be melted and poured successfully at relatively low temperatures. They are very fluid and pour well.

Silicon Bronzes and Brasses. The alloys known as silicon bronzes, UNS alloys C87300, C87600, and 87610, are relatively easy to melt and should be poured at the proper pouring temperatures. If overheated, they can pick up hydrogen. While degassing is seldom required, if necessary, one of the proprietary degasifiers used with aluminum bronze can be successfully used. Normally no cover fluxes are used here. The silicon brasses (UNS alloys C87500 and C87800) have excellent fluidity and can be poured slightly above their freezing range. Nothing is gained by excessive heating, and in some cases, heats can be gassed if this occurs. Here again, no cover fluxes are required.

Copper-Nickel Alloys. These alloys (90Cu-10Ni, UNS C96200 and 70Cu-30Ni, UNS C96400) must be melted carefully because the presence of nickel in high percentages raises not only the melting point but also the susceptibility to hydrogen pickup. In virtually all foundries, these alloys are melted in coreless electric induction furnaces, because the melting rate is much faster than it is with a fuel-fired furnace. When ingot is melted in this manner, the metal should be quickly heated to a temperature slightly above the pouring temperature and deoxidized either by the use of one of the proprietary degasifiers used with nickel bronzes or, better yet, by plunging 0.1% Mg stick to the bottom of the ladle. The purpose of this is to remove all the oxygen to prevent any possibility of steam-reaction porosity from occurring. Normally there is little need to use cover fluxes if the gates and risers are cleaned by shot blasting prior to melting.


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