JIS G is standard which specified the spring steel mainly used for the hot formed springs such as the laminated springs, coiled springs. The symbols which denote the degree of correspondence in the contents between the relevant International Standard and JIS are IDT (identical), MOD. See the chemical composition and physical properties of JIS G Grade SUP9A, find alternative materials, and connect with suppliers.

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Because the thermal conduction function is affected by ring substrates, the thermal conductivity of surface treatment layers, ring shapes, etc. However, it does not have sufficient thermal sag resistance. When the microwelding occurs, the torque of a rotating shaft 2 changes, accompanied by temperature elevation. The spheroidal cementite preferably has an average particle size of 0. Because the thermal conductivity is mainly determined by the movement of free electrons in crystal grains of metals, higher thermal conductivity is obtained with fewer solid solution elements.

Accordingly, investigation is conducted to lower the temperature of combustion chamber walls. However, the thermal sag resistance is actually deteriorated as the amounts of alloying elements decrease, making impossible use for compression rings in a high-thermal-load environment. The relation between the thermal conductivity of the steel and the total amount of alloying elements is shown in FIG.

Japanese Office Action, dated Feb.

Search Expert Search Quick Search. Share on Facebook Share. The facts that the amount of Si, a solution-strengthening element, is particularly smaller in SUP10 used in the present invention than in Si—Cr steel, and that spheroidal cementite is formed, appear to gg to the improvement of thermal conductivity by reducing the solid solution of C.

Alloying elements 1 and thermal conductivities of steels for piston rings. Gear part and method of producing thereof. Steel is generally more inexpensive as the amounts of alloying elements are smaller.

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About Our Company Otai Special Steel was established in to provide a wide range of high quality steel to the global market. A usual measure against knocking is the delaying of ignition timing spark advancebut it makes it impossible to keep high thermal efficiency.

Namely, a peripheral surface of the compression ring was provided with a CrN coating by ion plating, and side surfaces of the compression ring were provided with a zinc phosphate coating Example 2 and a manganese phosphate coating Example 3. The test was conducted 5 times in each of Examples 1, 4 and 5, and Comparative Examples 1, 4810 and 5, and the measured results were averaged.

Share on Pinterest Share. Also, the temperature of ring grooves of an aluminum piston can be lowered, suppressing microwelding and wearing of the ring grooves. Compression ring and its production method.

A method for producing a compression ring consisting of a composition consisting of by mass 0. A wire used for the production of the compression ring of the present invention is produced by melting steel SUP10 having a composition comprising by mass 0.

Compression ring and its production method – KABUSHIKI KAISHA RIKEN

SUP9A steel stockholders and suppliers from china. SUP9A steel Rectangular pieces can be sawn from flat bar or plate to your specific sizes. An object of the present invention is to provide a compression ring having excellent thermal conductivity and thermal sag resistance as well as good price competitiveness, which can be used in a high-thermal-load environment in high-compression-ratio engines, and a method for producing such a compression ring.

In Comparative Example 1, a rectangular cross-sectioned wire of 1.

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B the residual cementite of about 0. The number of cycles at that time was jiz to evaluate the life of the ring. In Examples 1, 4 and 5, and Comparative Examples 1, 2 and 5, the thermal conductivity was measured by a laser flash method. What is claimed is: Accordingly, the spheroidizing annealing is conducted preferably in place of the second patenting treatment.

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Alloy to be surface-coated and sliding members. Of course, surface treatments such as plating, PVD, etc. 401 production method of the present invention using mass-produced steel defined by JIS contributes to cost reduction. The results are shown in Table 2 and FIG. We pride ourselves on our impeccable quality and service. Ground Spring Steel bar can be supplied, providing a quality precision finished bar to tight tolerances.

When good thermal conductivity is predominantly needed, a chromium plating is preferable, but when wear resistance and microwelding resistance are important, ion-plated CrN coatings are preferable, and DLC coatings are suitable for aluminum cylinders. Because stress is concentrated on the spheroidal jiss, it is considered as a factor of decreasing the mechanical properties of steel wires.

A SumoBrain Solutions Company. Thus, for the same compression rings, proper surface treatments may be selected depending on sliding mate members, use environment, etc.

SteelJIS: Japanese Steels and Alloys

In addition, 4810 pistons are made of aluminum, aluminum softens as the combustion chamber temperature is elevated, so that fatigue failure occurs in ring grooves of pistons due to the high-temperature impingement 481 sliding of compression rings, making likely the wearing of ring grooves and microwelding to compression rings. Materials with smaller amounts of alloying elements have higher thermal conductivities. The extended European search report, dated Mar.

Click for automatic bibliography generation. The Formation of Martensite.