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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Alloying elements 1 and thermal conductivities of steels for piston rings. Each wire of SUP10 steel rolled to 8 mm in diameter was formed into a rectangular cross-sectioned wire of 1. The spheroidal cementite preferably has an average particle size of 0.

JIS G4801 Spring Steel Flat Bars SUP9,Spring Steel Sup7 Sup9

Because the heat treatment temperature and time differ depending on the size of a heat treatment furnace and the cross section areas of items to be treated, they should be adjusted such that the 480 cementite has preferred particle size and area ratio.

Process for the production of hardened parts of steel. For environmental protection, automobile engines are recently designed to have improved fuel efficiency, low emission and high power, so that engines tend to have high compression ratios and high load.

The method of the present invention for producing a compression ring having a composition comprising by mass 0. Compression ring and its production method. The preferred average particle size is 0.

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Wear resistant sintered member. Process for setting the thermal conductivity of a steel, tool steel, in particular hot-work steel, and steel object.

What is claimed is: Image analysis conducted in the same manner as in Example 1 on scanning electron photomicrographs of the wire structures revealed that the spheroidal cementites jid Examples 4 and 5 had average particle sizes of 0. The v are shown in Table 2. Because the residual cementite of about 0. A higher thermal conductivity provided a higher thermal sag ratio in Comparative Examples 1, 2 and 5, but the thermal sag ratios of Examples 1 and 5 were lower than a line connecting three Comparative Examples, confirming that the thermal sag ratio decreased at the same thermal conductivity, namely improvement in the thermal sag resistance.

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Thus, cost reduction is an important object. The production method of the present invention using mass-produced steel defined by JIS contributes to cost reduction. 481 States Patent However, higher compression ratios generally elevate combustion chamber temperatures, so that knocking easily occurs. Because stress is concentrated on the spheroidal cementite, it is considered as a factor of decreasing the jiw properties of steel wires. From the aspect of wear resistance and microwelding resistance, sliding peripheral surfaces of compression steel rings are usually subject to various surface treatments.

A compression ring consisting of a composition consisting of by mass 0.

To meet the above demand, for example, JP A proposes a proper composition comprising C, Si, Mn and Cr, which is jid by parameters in predetermined ranges, for piston rings having excellent thermal conductivity and thermal sag resistance, which are usable as compression rings. Next Patent Gas turbine engine v In Example 3 with a manganese phosphate coating, the difference of a substrate did not change the microwelding resistance life. The above composition is basically a steel composition identified by the material number of SUP10 according to JIS Ghaving high thermal conductivity because of a small total amount of alloying elements, though it comprises small amounts of Cr and V.

Wear resistant sintered member and production method therefor.

JIS G4801 Sup7 Spring Flat Steel

Because the thermal conduction function is affected by ring substrates, the thermal conductivity of surface treatment layers, ring shapes, etc. Click for automatic bibliography generation. In the present invention, relatively large spheroidized cementite is dispersed in a tempered martensite matrix.

A SumoBrain Solutions Company. High-hardness, 48011 steels and crawler components, earth wear resistant components, fastening bolts, high-toughness gears, high-toughness, high contact pressure resistance gears, and wear resistant steel plates using the same. Materials with smaller amounts of alloying elements have higher thermal conductivities.

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The averaged values of jix thermal sag resistance were shown in Table 2. In this case, the spheroidizing annealing is inevitably a batch treatment. To this end, it is most effective to dissipate the heat of pistons to cooled cylinder walls via compression rings. In the present invention, the spheroidal cementite has an average particle size of 0. Search Expert Search Quick Search. If the average particle size exceeds 1.

JIS G – Spring steels (Foreign Standard)

Share on Twitter Tweet. Each rectangular cross-sectioned wire of 1.

Ground Spring Steel bar can be supplied, providing a quality precision finished bar to tight tolerances. Because the thermal conductivity is mainly determined by gg movement of free electrons in crystal grains of metals, higher thermal conductivity is obtained with jiis solid solution elements. When the microwelding occurs, the torque of a rotating shaft 2 changes, accompanied by temperature elevation.

Thus, among the three basic functions of piston rings, a gas-sealing function, a thermal conduction function and an oil control function, the thermal conduction function is utilized. Thus, for the same compression rings, proper surface treatments may be selected depending on sliding mate members, use t, etc.

However, it does not have sufficient thermal sag resistance. About 30 min per 25 mm of ruling section is to be provided and then the steels should be immediately quenched in oil. We pride ourselves on our impeccable quality and service. The temperature and time period of the oil-tempering treatment comprising an oil quenching step and a tempering treatment step should be set such that all spheroidal carbides are not dissolved, namely, the spheroidal carbides have a preferred area ratio.

The compression ring of the present invention has a composition comprising by mass 0. Share jus Google Plus Share.