Name: How to make the abrasive tools that have been made soft down?
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How to make the abrasive tools that have been made soft down?

The ceramic bond abrasive is immersed in a sodium hydroxide or potassium hydroxide solution, heated to the boiling point, and the concentration of the alkali solution and the boiling time are controlled to appropriately reduce the hardness of the abrasive. Refer to Table 1 for the compatible concentration boiling time.

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Table 1 Alkali treatment to reduce the hardness of the abrasive reference table
Abrasive Grit	Boiling time（h）	Original hardness of abrasive tool
		K	L	M	N	P	Q	R	S	T	Y
		Alkaline concentration（%）
		10	20	30	10	20	30	10	20	30	40
24#	124	123	234	234	113	123	223	123	234	345	235
46#	124	234	345	356	134	234	245	112	123	234	123
60#	124	123	234	346	123	234	235	112	123	233	133

The strength of the grinding wheel after the treatment will be reduced. Therefore, it must be passed after passing the rotary inspection, especially the grinding wheel with a hardness reduction of 3~4, and more attention should be paid to prevent the grinding wheel from breaking when it is used.