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測試件測試方法及步驟-中英對照

發布時間:2013-1-2      閱讀次數:1575

測試件測試方法及步驟-中英對照
底部—一個平的環形底部牢牢固定在滲透測量裝置上,且在測試中對樣品施加力以測定出上表面的準確位置。
5.1.5 振動裝置—舉例,一個用電操作的蜂鳴器,輕微振動儀器以克服輕微摩擦力;不應超過次要負荷的5%。
本裝置在沒有摩擦力時可以略去。
6. 測試樣件
6.1 測試是用于比較同樣厚度的樣品,且樣品要求表面平滑,上下表面是平行的。當數量到達3個測試件時可以堆放以達到要求的厚度,樣品的尺寸取決于測試硬度所要求的測試類型。
6.2 類型 S1和S2—類型S1和S2的樣品厚度不惜在8-10
毫米之間。非標測試件可能稍厚或稍薄,但是厚度差不得大于2毫米。標準和非標樣品的側向尺寸不得根據小于表2給出的與測試件邊沿合適的距離而測得。
6.3 類型M—類型M 樣品顯微硬度測試的厚度應為2+0.5毫米。非標樣品可能會稍厚或稍薄,但是差異不得大于1毫米,
標準和非標的側向尺寸不能根據離邊沿少于2毫米的距離測得。當樣品的厚度大于宏觀測試計厚度4毫米時,由于側向滲透測量裝置上, 尺寸或平面面積不允許在標準測試計上進行測試,測試應該在盡可能離邊沿遠的地方進行。曲面測試件,例如:O型環,
表2 在距離測試件邊沿最小的距離進行測試(適合于所有類型,除了類型M以外)
如果樣品安裝的方式不變測試中運動的情況下,可使用顯微硬度測試計測試,但是所得的數值與平坦的樣品測試結果沒有可比性。
6.4 類型 L—類型 L樣品的厚度應為10 至15 毫米。標準樣品可能稍厚或稍薄,但是差異不得超過2毫米。非標樣品也可能稍厚或稍薄,但差異不得超過6毫米。標準和非標樣品的側向尺寸不得根據小于表2給出的與測試件邊沿合適的距離而測得。
6.5 類型H—參考 6.2 (類型S1和S2).
7. 測試溫度
7.1 正常的測試溫度應為23+ 2°C(73.4+3.6°F)。在進行測試前,測試件應在此溫度下保持至少3小時。對大氣濕度敏感的樣品應調節大氣壓,并控制在50+5 %的相對濕度(RH%)下長達24小時。
D 1415-05
當試驗在更高或者更低的溫度條件下進行時, 樣品在試驗的條件保持一段時期,直到與測試室里溫度一致。溫度符合D 1349指定的要求,或通過用戶和供應者雙方協商并一致同意。
8.程序
8.1.根據7.1樣品條件的要求。稍微用滑石粉擦抹試驗樣品的上表面和下表面。在水平的硬質表面上放置樣品,并且降低放置樣品的表面裝置的底座。對柱塞施加壓力,同時用較小力量施加在鋸齒形的球體上,方向與樣品垂直,保持5 秒鐘。
8.2.如果量規符合IRHD要求,轉動量規的玻璃框,將指針指向100(練習避免施加任何垂直方向的壓力給量規)。將主要力量施加給柱塞并對球體保持壓力30 秒鐘 (注意事項3)。記錄量規上顯示的IRHD的硬度讀數。
注意事項3--在負荷的過程中,輕微的振動儀器,克服任何形式的磨擦。.
8.3.如果測量裝置采用英寸單位,記錄30 秒鐘范圍內,由主要負荷應用引起的柱塞運動,如果使用型號為M的顯微硬度檢測器,將運動的標度因數增加為6。對照表格3把測得的數值轉成IRHD,或在圖表中標明。
8.4.如果測量裝置采用公制單位,注意柱塞由另外鋸齒形受力(主要負荷)引起不同凹口,尺寸 (精確到毫米百分位)變化。如果使用的顯微硬度的檢測器的型號為M, 按照表格3的要求, 將運動的標度因數增加為6。型號為S1 和S2,表格3( b )型號為H, 表格3(c)型號為L . 對照表格3(a-c)把測得的數值轉成IRHD或在圖表中標明。
8.5.在樣品平均分配的3 或者5 個不同點中測量尺寸。取顯示裝置測量的最接近IRHD的中間值,(模擬儀器的全部數值和電子儀表數值為0.1,如果采用該裝備),記錄為硬度值結果。
5.1.4 Foot—A flat annular-shaped foot that is rigidly fas
tened to the penetration-measuring device and normal to the
 axis of the plunger, and which during the test is forced against the specimen in order to determine accurately the position of the upper surface.
 5.1.5 Vibrating Device—For example, an electrically oper¬ated buzzer, for gently vibrating the apparatus to overcome any slight friction; this should not

exceed 5 % of the minor load. This device may be omitted on apparatus without any friction.
6. Test Specimen
6.1 Tests intended to be comparable must be made on
specimens of the same thickness that have smooth, flat, and
parallel upper and lower surfaces. Up to three specimens may
be plied to obtain the required thickness. The dimensions of the
specimen depend on the test type being used to measure the
hardness.
6.2 Types S1 andS2—The Types S1 and S2 specimens shall
be between 8 and 10 mm in thickness. Nonstandard specimens
may be either thicker or thinner but in no case less than 2 mm
thick. The lateral dimensions of both standard and nonstandard
specimens shall be such that no test is made at a distance from
the edge of the specimen less than the appropriate distance
shown in Table 2.
6.3 Type M—The Type M specimen micro-hardness tests
shall be 2 6 0.5 mm in thickness. Nonstandard specimens may
be either thicker or thinner but in no case less than 1 mm thick.
The lateral dimensions of both standard and nonstandard
specimens shall be such that no test is made at a distance from
the edge of less than 2 mm. When specimens thicker than 4 mm
are tested on the micro tester because lateral dimensions or area
of flatness do not permit testing on a standard tester, the test
shall be made at a distance from the edge as great as possible.
Curved specimens, for example, O-rings, may be tested with
TABLE 2 Minimum Distance from Edge of Specimen at Which Test is Made (All types except M)
Total Thickness of Specimen Minimum Distance from Edge
mm in. mm in.
4 0.16 7.0 0.28
6 0.25 8.0 0.31
8 0.3 9.0 0.35
10 0.4 10.0 0.40
15 0.6 11.5 0.45
25 1.0 13.0 0.50
the micro-hardness tester if the specimens are mounted in such a manner as to prevent movement during the test, but the values obtained may not be comparable to those obtained with flat specimens.
6.4 Type L—The Type L specimens shall be 10 to 15 mm in
thickness. Standard specimens may be either thicker or thinner
but in no case less than 2 mm. Nonstandard specimens may be
either thicker or thinner but in no case less than 6 mm. The
lateral dimensions of both standard and nonstandard specimens
shall be such that no test is made at a distance from the edge
of the specimen less than the appropriate distance shown in
Table 2.
6.5 Type H—Refer to 6.2 (Types S1 and S2).
7. Test Temperature
 7.1 The test shall be normally carried out at 23 6 2°C (73.4 ± 3.6°F). The specimens shall be maintained at the test temperature for at least 3 h

 immediately prior to testing. Specimens that are sensitive to atmospheric moisture shall be conditioned in an atmosphere controlled to 50 6 5 % relative

humidity (RH%) for at least 24 h. When tests are made at
D 1415-05
higher or lower temperatures, the specimens shall be main¬tained at the conditions of test for a period of time sufficient to reach temperature equilibrium with the testing chamber, and the temperatures shall be chosen from those specified in Practice D 1349, or as otherwise agreed upon between cus¬tomer and supplier.
8. Procedure
8.1 Condition the specimen in accordance with 7.1. Slightly
dust the upper and lower surfaces of the test specimen with
talc. Support the specimen on a horizontal rigid surface, and
lower the foot to rest on the surface of the specimen. Press the
plunger, with the minor force on the indenting ball, vertically
onto the specimen for 5 s.
8.2 If the gage is graduated directly in IRHD, turn the bezel
of the gage so that the pointer indicates 100 (exercise care to
avoid exerting any vertical pressure on the gage). Add the
major force to the plunger and maintain the total force on the
ball for 30 s (Note 3). Record the reading on the gage as the
hardness in IRHD.
NOTE 3—During the loading periods, the apparatus shall be gently vibrated to overcome any friction.
8.3 If the measuring device is graduated in inch units, record
the movement of the plunger caused by application of the
major load for 30 s. If the Type M micro-hardness tester is
used, multiply this movement by the scale factor of 6. Convert
the value obtained into IRHD by using Table 3 or a graph
constructed therefrom.
8.4 If the measuring device is graduated in metric units, the
differential indentation, D, (in hundredths of a millimetre) of
the plunger caused by the additional indenting force (the major
load) for 30 s, shall be noted. If the Type M micro-hardness
tester is used, multiply this movement by the scale factor of 6,
as given in Table 3 (a) for Types S1 and S2, Table 3 (b) for
Type H, and Table 3 (c) for Type L. Convert the value obtained
into IRHD by using Table 3 (a-c) or a graph constructed
therefrom.
8.5 Make one measurement at each of three or five different
points distributed evenly over the specimen. Take the median
of these measurements rounded to the nearest displayed unit of
IRHD (whole numbers for analog instruments and 0.1 units for
digital instruments, if so equipped), and record the result as the
hardness value.

2013.1.2

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