The invention provides a water-soluble metal-working oil agent, including a component A, a component B, a component C, and a component D, wherein the component A is an ester compound which has a characteristic temperature, as measured in accordance with JIS K2242, of 570°C or higher and which is contained in the water-soluble metal-working oil agent in an amount of 10 mass% or more with respect to the entire amount of the agent; the component B is at least one condensed fatty acid which is selected from a condensed fatty acid (1), produced through dehydration condensation of a hydroxycarboxylic acid, and a condensed fatty acid (2), produced through dehydration condensation of an alcoholic hydroxyl group of the condensed fatty acid (1) with a monovalent carboxylic acid, which has a characteristic temperature, as measured in accordance with JIS K2242, of 650°C or higher, and which is contained in the water-soluble metal-working oil agent in an amount of 7.5 mass% or more with respect to the entire amount of the agent; the component C is a carboxylic acid which is contained in the water-soluble metal-working oil agent in an amount of 2 mass% or more with respect to the entire amount of the agent; and the component D is a basic compound contained in such a neutralization equivalent that at least the component B and component C are neutralized to cancel out the sum of the acid values thereof. The agent can provide excellent workability with a hard-to-work material and can prolong tool life.
本发明提供了一种
水溶性
金属加工油剂,包括 A 组分、B 组分、C 组分和 D 组分,其中 A 组分是一种
酯类化合物,根据 JIS K2242 测量,其特征温度为 570°C 或更高,且在
水溶性
金属加工油剂中的含量占整个油剂的 10 质量%或更多;组分 B 是至少一种缩合
脂肪酸,选自羟基
羧酸脱
水缩合生成的缩合
脂肪酸 (1) 和缩合
脂肪酸 (2)、通过缩合
脂肪酸(1)的醇羟基与一价
羧酸脱
水缩合生成的缩合
脂肪酸(2),其特征温度(根据 JIS K2242 测量)为 650°C 或更高,其在
水溶性
金属加工油剂中的含量为 7.组分 C 是一种
羧酸,其在
水溶性
金属加工油剂中的含量为该油剂总量的 2 质量%或更高;组分 D 是一种碱性化合物,其中和当量至少为组分 B 和组分 C 的中和量,以抵消其酸值之和。该剂可为难加工材料提供出色的加工性,并可延长工具寿命。