Stainless Iron Lost Wax Casting

Stainless iron is chromium-containing but not nickel-containing, also known as Cr stainless steel, which has a certain anti-corrosion ability! Stainless iron is a common saying. It is commonly believed that stainless steel with ferromagnetic properties mainly refers to 1Cr17 (ferrite) series and 1Cr13 (martensite) series, while Fe is not ferromagnetic when it exists in the form of austenite. It is easy to misunderstand the distinction between Ni/Cr in this paper, although they lead to the allotropy of Fe. But Fe and Ni are ferromagnetic and Cr is paramagnetic. Many of the 1J series of high-performance soft magnetic materials are Ni-based.

Compared with stainless steel, stainless iron mainly depends on whether it contains nickel! Stainless iron generally refers to SUS430 in Japan, 1Cr17 in China, and the main chemical components are: C:<0.12, Si:<0.75, Mn<1.00, P:<0.035, S<0.030, Ni:<0.60, Cr:16.00 -18.00 is ferritic stainless steel.

After more than ten years of precipitation, Qinhuangdao Zhongwei Precision Machinery Co., Ltd. has rich production experience in water glass lost wax precision casting, lost foam precision casting technology, silica sol precision casting technology, and shell sand casting technology. We expect manufacturers from all over the world to consult and negotiate business.

Product Description

Stainless iron lost wax casting Basic Case

1. Implementation standards: The company strictly implements ISO9001 & TS 16949 certification.

2. Product material standards: ISO, GB, ASTM, SAE, ISO, EN, DIN, JIS, BS

3. Main processes: sand casting, silica sol investment casting, water glass investment casting,shell casting,deburring, sand blasting, machining, heat treatment, leak testing, surface treatment, etc.

4. Available materials:

High manganese steel, high chromium steel, high nickel steel, carbon steel, alloy steel, stainless steel, gray iron, cast iron, cast steel, cast aluminum, cast copper, etc. can be customized according to customer requirements.

Stainless Iron Lost Wax Castingmaterial Classification

In layman's terms, stainless iron is iron that is not easy to rust. In fact, some stainless irons have both rust resistance and acid resistance (corrosion resistance). The rust and corrosion resistance of stainless iron is due to the formation of a chromium-rich oxide film (passivation film) on its surface. This rust resistance and corrosion resistance are relative. Tests show that the corrosion resistance of iron in weak media such as air and water and in oxidizing media such as nitric acid increases with the increase of chromium water content in iron. When the chromium content reaches a certain percentage, the corrosion resistance of iron occurs. Mutation, that is, from easy to rust to not easy to rust, from corrosion-resistant to corrosion-resistant. There are many ways to classify stainless steel. According to the structure at room temperature, there are martensitic, austenitic, ferritic and duplex stainless iron; according to the main chemical composition, it can be basically divided into chromium stainless iron and chromium-nickel stainless iron. Large system; according to the use, there are nitric acid-resistant stainless iron, sulfuric acid-resistant stainless iron, seawater-resistant stainless iron, etc., according to the type of corrosion resistance, it can be divided into pitting-resistant Intergranular corrosion-resistant stainless iron, etc.; according to functional characteristics, it can be divided into non-magnetic stainless iron, free-cutting stainless iron, low temperature stainless iron, high-strength stainless iron and so on. Due to its excellent corrosion resistance, formability, compatibility and toughness in a wide temperature range, stainless steel has been widely used in heavy industry, light industry, daily necessities industry and building decoration industries. Applications.

1. Austenitic stainless iron

Stainless iron with austenitic structure at normal temperature. When iron contains about 18% Cr, 8%~10% Ni, and about 0.1% C, it has a stable austenite structure. Austenitic chromium-nickel stainless iron includes the well-known 18Cr-8Ni iron and high Cr-Ni series iron developed by increasing the content of Cr and Ni and adding Mo, Cu, Si, Nb, Ti and other elements on this basis. Austenitic stainless iron is non-magnetic and has high toughness and plasticity, but its strength is low, it is impossible to strengthen it through phase transformation, and it can only be strengthened through cold working. Such as adding S, Ca, Se, Te and other elements, it has good machinability. In addition to the corrosion resistance of oxidizing acid medium, this kind of iron can also resist the corrosion of sulfuric acid, phosphoric acid, formic acid, acetic acid, urea, etc. if it contains elements such as Mo and Cu. If the carbon content in this type of iron is less than 0.03% or contains Ti and Ni, its resistance to intergranular corrosion can be significantly improved. High-silicon austenitic stainless iron with concentrated nitric acid has good corrosion resistance. Due to its comprehensive and good comprehensive properties, austenitic stainless iron has been widely used in all walks of life.

2. Ferritic stainless iron

Stainless iron mainly composed of ferrite in the use state. The chromium content is between 11% and 30%, and it has a body-centered cubic crystal structure. This type of iron generally does not contain nickel, and sometimes contains a small amount of Mo, Ti, Nb and other elements. This type of iron has the characteristics of large thermal conductivity, small expansion coefficient, good oxidation resistance, and excellent stress corrosion resistance. , Parts corroded by water vapor, water and oxidizing acid. This type of iron has disadvantages such as poor plasticity, significantly reduced post-weld plasticity and corrosion resistance, which limit its application. The application of out-of-furnace refining technology (AOD or VOD) can greatly reduce interstitial elements such as carbon and nitrogen, thus making this type of iron widely used.

3. Austenite-ferritic duplex stainless iron

It is a stainless steel with austenite and ferrite structures each accounting for about half. In the case of low C content, the Cr content is 18%~28%, and the Ni content is 3%~10%. Some iron also contains Mo, Cu, Si, Nb, Ti, N and other alloying elements. This type of iron has the characteristics of both austenitic and ferritic stainless iron. Compared with ferrite, it has higher plasticity and toughness, no room temperature brittleness, and significantly improved intergranular corrosion resistance and welding performance. There are 475 ℃ brittleness and high thermal conductivity of ferritic stainless iron, and it has the characteristics of superplasticity. Compared with austenitic stainless iron, it has high strength and significantly improved resistance to intergranular corrosion and chloride stress corrosion. Duplex stainless iron has excellent pitting corrosion resistance and is also a nickel-saving stainless iron.

4. Martensitic stainless iron

Stainless iron whose mechanical properties can be adjusted by heat treatment, in layman's terms, is a kind of hardenable stainless iron. The typical grade is Cr13 type, such as 2Cr13, 3Cr13, 4Cr13 and so on. High hardness after quenching, different tempering temperatures have different strength and toughness combinations, mainly used for steam turbine blades, tableware, surgical instruments. According to the difference in chemical composition, martensitic stainless iron can be divided into martensitic ferrochromium and martensitic ferronickel. According to the different structure and strengthening mechanism, it can also be divided into martensitic stainless iron, martensite and semi-austenite (or semi-martensite) precipitation hardening stainless iron and maraging stainless iron.

Corrosion Resistance

301 stainless steel exhibits obvious work hardening phenomenon during deformation, and is used in various occasions requiring higher strength.

302 stainless iron is essentially a variant of 304 stainless iron with higher carbon content, which can obtain higher strength by cold rolling.

302B is a kind of stainless iron with high silicon content, which has high resistance to high temperature oxidation.

304 is a general-purpose stainless steel that is widely used to make equipment and parts that require good overall properties (corrosion resistance and formability).

304L is a lower carbon variant of 304 stainless steel used where welding is required. The lower carbon content minimizes carbide precipitation in the heat-affected zone near the weld, which can lead to intergranular corrosion (weld erosion) in stainless steel in some environments.

304N is a nitrogen-containing stainless iron, and nitrogen is added to increase the strength of the iron.

305 and 384 stainless irons contain high nickel and have a low work hardening rate, making them suitable for applications requiring high cold formability.

308 stainless iron is used to make electrodes.

The nickel and chromium content of 309, 310, 314 and 330 stainless irons are relatively high, in order to improve the oxidation resistance and creep strength of iron at high temperatures. The 30S5 and 310S are variants of 309 and 310 stainless steel, the only difference being that the carbon content is lower, in order to minimize the precipitation of carbides near the weld. 330 stainless iron has a particularly high resistance to carburization and thermal shock resistance.

Our company Ke can customize the Stainless iron lost wax casting you need according to the above material requirements of customers.

Post Casting Process

1. Heat treatment: annealing, carbonization, tempering, quenching, normalizing, surface tempering

2. Processing equipment: CNC, WEDM, lathe, milling machine, drilling machine, grinder, etc.;

3. Surface treatment: powder spraying, chrome plating, painting, sandblasting, nickel plating, galvanizing, blackening, polishing, bluing, etc.

Moulds and Inspection Fixtures

1. Mold service life: usually semi-permanent. (except for lost foam).

2. Mold delivery time: 10-25 days, (according to product structure and product size).

3. Tooling and mold maintenance: Zhongwei is responsible for precision parts.

Quality Control

1. Quality control: the defective rate is less than 0.1%.

2. Samples and trial run will be 100% inspected during production and before shipment, sample inspection for mass production according to ISDO standards or customer requirements

3. Testing equipment: flaw detection, spectrum analyzer, golden image analyzer, three-coordinate measuring machine, hardness testing equipment, tensile testing machine;

4. Provide after-sales service.

5. The quality can be traced back.

Application

Stainless iron lost wax casting are used in mechanical parts, auto parts, lock parts, valve castings, pipe joints, hardware tools, kitchen hardware, bathroom hardware, lighting hardware, marine hardware, architectural decoration hardware, door hinges, stair handrail accessories, glass connectors , electrical hardware castings, stove accessories and many other fields are widely used.