自我國(guó)《GB/T230.1-2018金屬材料 洛氏硬度試驗(yàn) 第1部分：試驗(yàn)方法》 頒布以來(lái)陸續(xù)接到鋼鐵生產(chǎn)企業(yè)、第三方檢測(cè)機(jī)構(gòu)咨詢對(duì)鍍錫板產(chǎn)品的硬度檢測(cè)問(wèn)題。針對(duì)此類問(wèn)題小編會(huì)陸續(xù)推出一些相關(guān)的標(biāo)準(zhǔn)和文章供廣大技術(shù)人員相互交流學(xué)習(xí)。為尊重原創(chuàng)及知識(shí)產(chǎn)權(quán)我們?cè)谖恼?后做了相關(guān)參考文獻(xiàn)的描述，內(nèi)容涉及的**及知識(shí)產(chǎn)權(quán)本平臺(tái)不負(fù)責(zé)。今天給大家大家推送的是《ASTM A623M鍍錫薄板產(chǎn)品技術(shù)規(guī)范和一般要求附錄A.1》的翻譯稿件，不足之處請(qǐng)指正為盼。

A1. ROCKWELL HARDNESS TESTING OF TIN MILL PRODUCTS ^［1］

鍍錫薄板產(chǎn)品洛氏硬度測(cè)試

(Mandatory Information)

(規(guī)范性附錄)

A1.1 Scope范圍

A1.1.1 This annex covers the application to tin mill prod-ucts of Rockwell superficial hardness tests using the 15TS and 30TS scales. Tests shall be made in accordance with themethods outlined in Test Methods E18 and Test Methods and Definitions A370 with the exceptions given in the following sections.

本附件涵蓋了使用15TS和30TS標(biāo)準(zhǔn)進(jìn)行洛氏表面硬度測(cè)試的鍍錫薄板產(chǎn)品的應(yīng)用。測(cè)試應(yīng)按照ASTM E18測(cè)試方法和ASTM A370中描述的方法進(jìn)行，以下章節(jié)給出了例外情況。

A1.2 Anvil 測(cè)砧及壓頭

A1.2.1 All tests shall be made using the diamond spot anvil and a 1.588 mm hardened steel ball indenter.

所有測(cè)試應(yīng)使用金剛石點(diǎn)砧和?1.588 mm淬火鋼球壓頭。

A1.3 Specimens 試樣

A1.3.1 Thickness—The recommendations given in Table 12 of Test Methods E18 shall not apply to tests on tin mill products. The Rockwell superficial scale to be used shall be determined from the nominal thickness of the material as given in the following table:

試樣厚度-試驗(yàn)方法E18表12中給出的建議不適用于鍍錫薄板產(chǎn)品的測(cè)試。使用的表面洛氏標(biāo)尺應(yīng)根據(jù)材料的公稱厚度確定，如下表所示:

Nominal sheet Thickness mm 薄板公稱厚度	Rockwell superficial Scale 表面洛氏標(biāo)尺	Major Load,kgf *大試驗(yàn)力
0.212 和更薄的	15TS	15
0.547-0.213	30TS	30

 

A1.3.2 Surface Finish—The surface of the specimen in contact with the diamond spot anvil shall be flat, smooth, and free from dirt or surface irregularities. When necessary, both specimen surfaces shall be sanded smooth to remove surface irregularities that may affect the test results. Sanding debris shall be removed from the sample before testing. Unless otherwise agreed upon, the tin coating shall not be removed from the surface on which the indentation is made.

表面粗糙度-試樣與金剛石點(diǎn)砧接觸的表面應(yīng)平整、光滑、無(wú)污垢或表面不平整。必要時(shí)，兩個(gè)試樣表面都應(yīng)打磨光滑，以去除可能影響試驗(yàn)結(jié)果的表面不平整。在測(cè)試前，應(yīng)將砂屑從樣品中除去。除非另有約定，否則不得從壓痕處的表面除去鍍錫層。

A1.4 Reports 試驗(yàn)報(bào)告

A1.4.1 Number of Tests—The Rockwell scale value to be reported shall be the average of at least three impressions.

測(cè)試次數(shù)-洛氏硬度值應(yīng)為至少三次試驗(yàn)的平均值。

A1.4.2 Conversion—Hardness tests made on the 15TS scale may be converted to the 30TS scale by the use of Table A1.1. It is recognized that such conversions are for convenience in reporting and that conversion, particularly from tests on thin and soft materials, is not an accurate process.

硬度值換算-在15TS標(biāo)尺上進(jìn)行的轉(zhuǎn)換硬度測(cè)試可通過(guò)表A1.1轉(zhuǎn)換為30TS標(biāo)尺。人們認(rèn)識(shí)到，這種轉(zhuǎn)換僅是為了方便報(bào)告，而且這種轉(zhuǎn)換，特別是從薄和軟材料的測(cè)試中進(jìn)行的轉(zhuǎn)換，這種轉(zhuǎn)換過(guò)程不是很準(zhǔn)確，僅供參考。

 

圖1. 時(shí)代全自動(dòng)洛氏硬度計(jì)TIMEH1110在軸承行業(yè)典型應(yīng)用

TABLE A1.1 Conversion Table (Approximation) Rockwell Hardness Testing

表A1.1 換算表(近似)洛氏硬度試驗(yàn)

HR30TS	HR15TS	HR30TS	HR15TS
82.0	93.0	65.0	84.0
81.5	92.5	64.0	...
81.0	...	63.5	83.5
80.5	92.0	62.5	83.0
80.0	...	62.0	...
79.0	91.5	61.5	82.5
78.5	...	60.5	82.0
78.0	91.0	60.0	...
77.5	90.5	59.5	81.5
77.0	...	58.5	81.0
76.0	90.0	58.0	...
75.5	89.5	57.0	80.5
75.0	...	56.5	...
74.5	89.0	56.0	80.0
74.0	88.5	55.0	79.5
73.5	...	54.5	...
73.0	88.0	54.0	79.0
72.0	87.5	530.0	78.5
71.5	...	52.5	...
71.0	87.0	51.5	78.0
70.0	86.5	51.0	77.5
69.5	...	50.5	...
69.0	86.0	49.5	77.0
68.0	85.5	49.0	76.5
67.5	...	48.5	...
67.0	85.0	47.5	76.0
66.0	...	47.0	75.5
65.5	84.5	46.0	...

 

［1］  Standard Specification for Tin  Mill  Products, General Requirements [Metric]. ASTM A623, 2016.A.1