JIS G 4801 PDF

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.

Author: Tojagis Maum
Country: Lesotho
Language: English (Spanish)
Genre: Medical
Published (Last): 22 September 2014
Pages: 492
PDF File Size: 10.9 Mb
ePub File Size: 18.23 Mb
ISBN: 326-8-56687-712-9
Downloads: 12281
Price: Free* [*Free Regsitration Required]
Uploader: Mikale

JIS G4801 Grade SUP9A

Decarburization resistance is also good big cross section of various important spring, such as automobile, locomotive, large plate spring, spring, etc. Thus, the compression ring of the present invention has a composition comprising by mass 0.

Steel is generally more inexpensive as the amounts of alloying elements are smaller. Click for automatic bibliography generation. Though the spheroidizing annealing may be conducted in place of the first patenting treatment for higher productivity, attention should be paid jks provide the spheroidal cementite with particle sizes in a predetermined range.

jjis Compression ring and its production method. Gear part and method of producing thereof. Japanese Office Action, dated Feb. 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 his in the thermal sag resistance.

A compression ring consisting of a composition consisting of by mass 0. Each wire of SUP10 steel rolled to 8 mm in diameter was formed into a rectangular cross-sectioned wire of 1.

To provide a price-competitive compression ring having excellent thermal 44801 and thermal sag resistance, which can be used in a high-thermal-load environment of high-compression-ratio engines, steel identified by the material number of SUP10 in JIS Gwhich contains small amounts of alloying elements, is used, and a piston ring wire is annealed before an oil-tempering treatment such that spheroidal cementite having nis average particle size of 0.

A usual measure against knocking is the delaying of ignition timing spark advancebut it makes it impossible to keep high thermal v. Rolling element and method of producing the same.

  KRAAKMAN THE ANATOMY OF CORPORATE LAW PDF

Because the residual cementite of about 0. The test was conducted 5 times in each of Examples 1, 4 and 5, and Comparative Examples 1, 2 and 5, and the measured results were averaged. SUP9A steel stockholders and suppliers from china.

Share on Twitter Tweet. 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 401 amounts of Cr and V.

Accordingly, investigation is conducted to lower the temperature of combustion chamber walls. Accordingly, knocking can be suppressed without needing such control as to delay ignition timing, keeping high thermal efficiency.

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

The extended European search report, dated Mar. Next Patent Gas turbine engine v 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. Each rectangular cross-sectioned wire of 1.

JIS G – Spring steels (Foreign Standard)

What is claimed is: The spheroidal cementite preferably has an average particle size of 0. In Examples 1, jsi and 5, and Comparative Examples 1, 2 and 5, the thermal conductivity was measured by a laser flash method. 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. Steel jks good wear resistance. Thus, among the three basic functions of piston rings, a gas-sealing function, a thermal conduction function iis an oil control function, the thermal conduction function is utilized.

A wire used for the production of the compression ring of the present invention is produced h melting steel SUP10 having a composition comprising by mass 0. The compression ring jia the present invention has a composition comprising by mass 0.

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 spheroidal cementite has preferred particle size and area ratio. When the microwelding occurs, the torque of a rotating shaft 2 changes, accompanied by temperature elevation. SUP9A steel Rectangular pieces can be sawn from flat bar or plate to your specific sizes.

  ANEMIE MEGALOBLASTIQUE PDF

The compression ring of the present invention is obtained from the above wire drawn to have a predetermined cross section shape, usually by forming the wire to a free form ring by a cam machine, conducting a strain-removing heat treatment, and grinding the side surfaces, peripheral surface, gap, etc.

However, higher compression ratios generally elevate combustion chamber temperatures, so that knocking easily occurs. In Example 3 with a manganese phosphate coating, the difference of a substrate did not change the microwelding resistance life. This appears to be 48801 to influence by the surface roughness of the manganese phosphate coating.

United States Patent About Our Company Otai Special Steel was established in to provide a wide range of high quality steel to the global market. 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.

To meet the above demand, for example, JP A proposes a proper composition comprising C, Si, Mn and Cr, which is defined by parameters in predetermined ranges, for piston rings having excellent thermal conductivity and thermal sag resistance, which are usable as compression rings.

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.

High-hardness, high-toughness 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. Alloying elements 1 and thermal conductivities of steels for piston rings.

The method of the present invention for producing a compression ring having a composition comprising by mass 0. Share on Google Plus Share.