study found that the more granular, uniform particles, close to the spherical powder particles more suitable for the manufacture of feed. The feed made of such powder is good for process liquidity and conducive to the successful completion of the entire MIM process.

SS201 has a high manganese content, a bright surface with dark and bright, which is easy to rust. 304 contains more chromium and the surface is matte and rust-free. It is easy to compare them. The most important thing is that the corrosion resistance of 201 is very poor, so the price is much cheaper. That is because 201 contains low nickel, so the price is lower than 304 and the corrosion resistance is not as good as 304.

At Present in the market, the demand for various parts of the product size range is generally greater than 10mm, and the minimum thickness is between 10 ~ 30mm. If MIM products can reach 30mm size range, MIM applications will be greatly widened, especially in the field of firearms, automobiles, precision machinery, such as submachine guns, machine guns, artillery, automotive engines, mechanical arm parts etc.

MIM industry is facing the standardization of production and the development of intensive opportunities. With this opportunity, only those who are willing to cooperate with domestic and foreign industry experts to adapt to the market and the environment, innovative MIM companies, can seize the opportunity to become the biggest winner in the reshuffle.

Shandong No2 Machinery Company is one of the leading MIM suppliers in China, we have been specializing in the field of MIM process(metal injection moulding) for over 14 years.

The diversified application of smart locks in commercial and government sectors, the uniqueness and ease of use of smart lock technology, the improvement of living standards, and the accumulation of R&D investment have contributed to the further explosion of the smart lock market.

The selection of MIM mold materials should satisfy the customer's quality requirements for the production products as much as possible, taking into account the material cost and material strength. The selection of MIM mold material needs to select the mold material with less affinity with the product according to the nature of the powder material to be injected by the customer, so as to prevent the sticking mold from aggravating the wear of the mold part, thereby affecting the quality of the mold and the demolding effect of the product.

For those MIM parts that cannot be produced in batches, different size and types, box heat treatment furnace can be selected.

For some alloy steels which are difficult to soften after annealing, high temperature tempering is often used after quenching (or normalizing) to make the carbides in the steels gather properly and reduce the hardness so as to facilitate cutting.

Complete annealing and isothermal annealing
Spheroidizing annealing
Spheroidizing annealing

Cooling is also an indispensable step in heat treatment. Cooling methods vary according to different processes.

Adjusting and controlling heating temperature are the main point to ensure the quality of heat treatment. The heating temperature varies with the metal material and the purpose of heat treatment, but it is generally heated to more than a characteristic transition temperature, in order to obtain high temperature structure.

Adjusting and controlling heating temperature are the main point to ensure the quality of heat treatment. The heating temperature varies with the metal material and the purpose of heat treatment, but it is generally heated to more than a characteristic transition temperature, in order to obtain high temperature structure.

Heat treatment process generally includes heating, heat preservation and cooling, sometimes only heating and cooling. These processes are interlinked and uninterrupted. Let’s study the detailed processes with Shandong No2 Machinery Co. Ltd..

Ultrasonic polishing method is to put the parts into the abrasive suspension and place them together in the ultrasonic field and use the oscillation of the ultrasonic wave to make the abrasive grinding and polishing on the surface of the workpiece. Ultrasound processing has a small macro-force and will not deform the workpiece, but it is difficult to fabricate and install the tool.