Металлургия met.

[kofemanka]

Мне необходимо выполнить перевод немаленького текста, но вот этот пункт меня мучает уже полдня. Помогите пожалуйста!!!

Hardenability testing for "H" band steels shall be conducted in accordance with SAE J406. Unless otherwise specified in the individual specification the hardenability aim shall be the center 50% of the hardenability band specified in SAE J1268. To qualify H BANDS, limited data points namely - J4, J8, J12 will be used. Hardenability of NON "H" grades shall be
calculated by the "Caterpillar" procedures (SAE J406 Appendix B-85) using DI

[rpsob]

Нужен металлург. Но первое предложение особых трудностей не имеет.
"Испытания на прокаливаемость стальной ленты Н (обладающей как раз повышенной прокаливаемостью) следует проводить в соответствии с SAE (Standards in Automotive) J406. "
(Прокаливаемость - глубина проникновения зоны закаливания.
МТ - широк и могуч. М.б. и еще кто-нибудь внесет свою лепту...)

[kofemanka]

rpsob, спасибо за ответ ;-)
как раз то первое предложение я для контекста написала, а вот с остальным дурдом самый настоящий...

[kofemanka]

Я еще не понимаю смысла слова aim в данном контексте... да и the center 50%, и DI окончательно ломает голову...

[Ivanog]

"H" band steels - закаливаемые стали с гарантированной нормой твердости (напр. 4140H в отличие от обычной сталт 4140). H-band - разброс значений твердости, измеряемой по длине образца после торцевой закалки. Что за aim - непонятно, надо стандарт читать или у спецов спрашивать.

SAE J406, Scope:
This SAE Standard prescribes the procedure for making hardenability tests and recording results on shallow and medium hardening steels, but not deep hardening steels that will normally air harden.
Included are procedures using the 25 mm (1 in) standard hardenability end-quench specimen for both medium and shallow hardening steels and subsize method for bars less than 32 mm (1-1/4 in) in diameter. Methods for determining case hardenability of carburized steels are given in SAE J1975.
Any hardenability test made under other conditions than those given in this document will not be deemed standard and will be subject to agreement between supplier and user. Whenever check tests are made, all laboratories concerned must arrange to use the same alternate procedure with reference to test specimen and method of grinding for hardness testing.
For routine testing of the hardenability of successive heats of steel required to have hardenability within certain limits, it is sufficient to designate hardenability simply in terms of distance from the quenched end to the point at which a certain hardness is obtained. This designation may also be adequate for comparing steels of different compositions to see whether they have similar hardenability.
Hardenability limits for specifying steel in this manner are obtained by measuring the hardenability of a steel which has proved satisfactory for the use intended. The hardenability test may be used in this way as an empirical test.
For new components where manufacturing experience is lacking, hardenability data may be effectively used to estimate the hardness profile provided by any given steel. Attendantly, the ability to predict hardenability from chemical composition has become increasingly important when comparing various steel grades or developing new steels for specific applications. One such procedure is described in Appendix A. Other hardenability prediction methods are available from the selected references in Section 2. However, it should be emphasized that the use of any hardenability prediction procedure does not preclude the importance of conducting Jominy end-quench tests to determine the actual hardenability of any specific grade of steel.
Hardenability data may be used to estimate hardnesses obtainable with any steel in new machine parts not yet in production and not similar to any parts on which production experience is available. Various hardenability application methods are described in the selected references, Section 2.1, 23 to 25. It appears none of these methods are precise, but these are often useful for estimation purposes. Final correlation on actual parts is necessary.

[Ivanog]

J - расстояние, измеряемое в 1/16 дюйма (правда не очень понятно от чего измеряют) http://www.timken.com/en-us/Knowledge/engineers/handbook/Pages/pdm045.aspx

[Esperantia]

Если еще актуально.

Unless otherwise specified in the individual specification the hardenability aim shall be the center 50% of the hardenability band specified in SAE J1268.

Если (in the individual specification - заказчиком?) не указано иное, желаемое значение прокаливаемости должно быть в пределах центральных 50 % полосы прокаливаемости, указанной в SAE J1268. (центральные 50 % - это 25+50+25, т.е. средние две четверти из четырех. Полоса прокаливаемости - это график, если что. Нехило бы стандарт посмотреть, может, смысл следующего предложения станет ясен оттуда...)